12 Best Smart Scales (July 2026) Honest Reviews

The best smart scales do more than show a number: they turn repeat weigh-ins into a readable weight and body-composition trend. I would choose one for dependable weight readings, an app I will actually open, and a clear view of progress rather than treating its body-fat percentage as a medical verdict.

This guide compares 12 documented smart bathroom scales, from simple Bluetooth models to eight-electrode designs with handles. I checked each listing for measurement resolution, capacity, displayed metrics, charging or battery approach, user profiles, supported health platforms, review volume, and the limitations called out in product data.

A smart scale is useful when you want a consistent record for weight loss tracking or training, not when you need a diagnosis. Community discussions make the same point repeatedly: the trend on one scale, measured in the same conditions, is more useful than chasing agreement with a clinic device on one morning.

My short answer is simple: Etekcity is the all-around pick for rechargeable convenience and broad app sync, Alcedo is the straightforward value pick, and RENPHO MorphoScan Nova is for people who want handle-based segmental analysis. The reviews below also call out strong Wi-Fi options, wide platforms, large displays, and longer warranty coverage for different homes in 2026.

Top 3 Picks for Best Smart Scales (July 2026)

These three cover the most common buying paths: a rechargeable all-rounder, a simple Bluetooth body composition scale, and a detailed handle model. Pick based on the way you weigh in and sync data, not on a long list of estimated metrics alone.

Editor’s Choice: Etekcity Smart Rechargeable Scale. It combines 0.1-pound readout accuracy, 13 listed metrics, USB-C charging, a privacy-minded Secret Mode, and connections to Apple Health, Google Fit, Fitbit, Samsung Health, and MyFitnessPal.

Best Value: Alcedo Smart Body Fat Scale. Its documented 400-pound capacity, 0.1-pound resolution, Bluetooth connection, color-changing status lights, and 20 key metrics make it the least complicated route to consistent routine tracking.

Premium Pick: RENPHO MorphoScan Nova. Choose it when a handle and eight-electrode, dual-frequency measurements matter more than a basic feet-only scale; it also lists USB-C charging and up to 150 days of battery life per charge.

Best Smart Scales In 2026

The comparison below keeps the choice focused on facts that change daily ownership: how the scale connects, how it measures, what it displays, and how much weight it is rated to hold. Body-metric totals are useful for app exploration, but weight consistency and easy syncing should decide most purchases.

1. Etekcity Smart Rechargeable Scale is the best all-around choice for simple tracking.

Etekcity earns the lead position because its feature set stays focused on the daily routine. The bright LED scale tracks weight, BMI, body fat, and muscle mass among 13 listed metrics, while the VeSync app expands the record with 12 more metrics.

I like that USB-C removes the small but recurring task of replacing batteries. Its 330-pound capacity is lower than many 400-pound competitors here, so capacity is the first fact I would check for a shared household.

The privacy detail is unusually practical: Secret Mode hides the exact weight on the display. Baby Mode and Zero-Current Mode add flexibility, and the documented 0.1-pound readout supports a fine-grained trend log.

The app connections make Etekcity a strong everyday choice.

The listing names Apple Health, Google Fit, Fitbit, Samsung Health, and MyFitnessPal syncing. That breadth matters if you already keep nutrition, activity, or weight data in more than one place and do not want a manual-entry chore.

Bluetooth is the connection method, so sync happens when the phone and scale can communicate rather than automatically over home Wi-Fi. For a person who weighs in with their phone nearby, that is a sensible trade for a rechargeable design.

The 330-pound limit makes Etekcity less suitable for every household.

This is the right model for an adult who values simple recharging, privacy on the display, and a broad health-app bridge. Its 14k-plus reviews and 4.7 rating offer more confidence in the user experience than a new product with only a small review history.

Pick a 400-pound platform from this list if that added capacity is a requirement. Also treat all impedance metrics as estimated trends, including the readings this scale provides, and keep your weigh-in time and conditions stable.

2. Alcedo Smart Body Fat Scale is the clearest basic choice for weight trends.

Alcedo is the uncomplicated pick when you want a Bluetooth body fat scale without a handle or Wi-Fi setup. It lists 20 key body metrics, four high-precision G-sensors, 0.1-pound or 0.05-kilogram resolution, and a 400-pound capacity.

The feature that stands out is its app-configured seven-color lighting. The scale can use color-coded weight-status lights, which may give a fast visual cue without asking you to interpret a graph at 6 a.m.

Its 4.7 rating comes from 552 reviews, with 87% marked five-star in the analyzed data. That is a favorable early signal, although it is a much smaller evidence base than the higher-volume models farther down this guide.

The 400-pound capacity makes Alcedo easy to share.

The full 400-pound rating makes it more accommodating than the Etekcity for family use. A flat form factor and backlit LED display also suit a bathroom where the scale will stay in one predictable spot.

The best setup is still a firm, level surface and a repeat routine. I would weigh without shoes, after the same part of the morning routine, because a clean series tells you more than one supposedly perfect body-fat estimate.

The Bluetooth-only approach suits people who keep their phone nearby.

Alcedo makes sense for a person who wants a digital weight scale with an app but does not need continuous cloud syncing. Color customisation requires the app, so it is a poor fit only if you want all controls available directly on the platform.

It is also worth remembering that its listed measurements describe consumer tracking, not medical testing. The scale can show movement over weeks, while hydration, meals, training, and time of day can shift BIA results from one day to the next.

3. RENPHO MorphoScan Nova is the premium pick for handle-based body analysis.

RENPHO MorphoScan Nova moves beyond feet-only BIA with eight electrodes and a handle. Its dual-frequency, segmental approach is designed to report more than 50 metrics, including muscle and fat analysis by body segment.

The 4.3-inch TFT-LCD handle screen shows nine pages of detailed measurement data, so you can see more than weight before opening the app. Voice broadcast provides measurement guidance, which may help someone build a consistent stance routine.

The rechargeable system is another strength: the listing claims up to 150 days on one USB-C charge. It also specifies a 400-pound capacity and 0.02-kilogram readout accuracy, roughly 0.04 pound.

The handle and segmental reports suit data-focused training routines.

This is a good match for someone who wants to compare longer-term body-composition patterns alongside weight and has room to store a handle scale. The handle can add information, but it also adds a technique step: hold it consistently and follow its prompts each time.

RENPHO lists Apple Health, Google Fit, and MyFitnessPal compatibility, plus unlimited user profiles. That makes it a plausible choice for a household where several adults maintain separate logs.

The extra measurements still work best as trend markers.

More reported metrics do not make consumer BIA a clinical scan. I would use the Nova to spot direction over weeks, then pair that information with training performance, waist measurements, and advice from a qualified clinician where health decisions are involved.

Its 4.5 rating across more than 10k reviews shows an established user base, yet the slightly lower score than the leading two picks is a reason to buy it for its handle-based features rather than for an imagined precision guarantee.

4. Wyze Scale Ultra is the strongest choice for automatic Wi-Fi syncing.

Wyze Scale Ultra is built for people who dislike waiting for a Bluetooth sync after every weigh-in. It offers both Wi-Fi and Bluetooth, a 4.3-inch customizable color TFT display, 13 body metrics including heart rate, and 0.1-pound readout accuracy.

The 400-pound capacity and automatic recognition for up to eight users suit a busy home. It also lists Baby, Pet, and Luggage modes, so the platform has uses beyond adult body-composition tracking.

Its review history is substantial, with a 4.6 rating from more than 25k reviews. That scale of feedback does not eliminate individual app or connection issues, but it gives the model a more established record than a recent listing.

The Wi-Fi connection makes Wyze easier for hands-off logging.

Wi-Fi is helpful when you want data to upload through the home network instead of relying only on a phone being close by. That can make the daily record feel less fussy, particularly when more than one family member uses the scale.

Wyze also lists Apple Health, Health Connect, and Fitbit sync. I would confirm the exact permissions in the companion app during setup, since platform connections can change and the cleanest system is the one that does not duplicate entries.

The display makes Wyze a better fit for screen-first users.

The color screen provides a more immediately readable experience than a basic LED weight readout. If you prefer fewer visual cues or want a rechargeable body composition scale, Etekcity may be the calmer choice.

Wyze uses four AAA batteries, so keep that ownership task in mind. The added display and Wi-Fi are compelling only if you will use the automatic sync and on-scale information instead of treating them as features to configure once and forget.

5. LOFTILLA 8-Electrode Smart Scale is a proven high-review handle-scale alternative.

LOFTILLA combines a hands-and-feet measurement system with a large 5.4-inch LED display. The documented eight-electrode dual-frequency design reports eight core metrics on the scale and more than 50 through the Feelfit app.

It is rated to 400 pounds with 0.1-pound readout accuracy, includes three AAA batteries, and comes with a one-year warranty. Its 4.6 rating from more than 34k reviews is the largest review base in this roundup.

For a buyer looking for a best smart scale with a handle, that established record is meaningful. It suggests plenty of owners have lived with the platform, app, and measurement workflow rather than only trying it once.

The hands-and-feet contact supports a more detailed routine.

The handle lets the scale gather readings through both hands and feet, which is different from conventional feet-only electrode sensors. It is a sensible route if segmental reports interest you, though stable positioning still matters to repeatability.

LOFTILLA lists multi-user support with auto-recognition and Apple Health plus Google Fit syncing. Those basics make it suitable for a household that wants one shared scale without sharing all of its progress data.

The battery system is the main long-term trade-off.

AAA batteries are easy to replace, but they are another item to monitor. If charging with a cable sounds easier, look instead at the Etekcity, RENPHO Elis Evo, MorphoScan Nova, or Runstar models.

The Feelfit app has the larger metric set, while the display covers the core readings. I would start by following weight and one or two personally useful trends, rather than letting a long dashboard create pressure to react to normal day-to-day movement.

6. arboleaf Smart Scale with Handle is best for a large platform and broad metric display.

The arboleaf handle model makes its case with a broad 12 by 13 inch platform, eight electrodes, and a carry handle. It shows seven core metrics on its LED screen and expands to more than 50 metrics in the app.

It is rated for 400 pounds, supports unlimited users with auto-recognition for up to nine profiles, and connects with Apple Health, Health Connect, and Samsung Health. The 4.7 rating from nearly 8k reviews is a strong signal for this category.

The stated readout accuracy is 0.2 pound, not 0.1 pound. That is still enough for normal trend tracking, but a buyer comparing spec sheets should know that the smaller increment belongs to other options here.

The large platform makes arboleaf appealing for steadier footing.

A wider standing surface can feel more comfortable, particularly for taller users or anyone who does not like balancing on a compact square. The handle also makes the 4.8-pound unit easier to move when cleaning the bathroom.

Because it displays seven metrics directly, arboleaf can work well for people who want feedback without checking a phone every morning. I would still use the app only after confirming it works with the health platform you already trust.

The 0.2-pound resolution makes arboleaf a trend tool, not a micro-change tracker.

The arboleaf is well suited to a home where user capacity, the larger footprint, and display depth are more important than showing every tiny weight fluctuation. Its segmental BIA format is also attractive for fitness-minded users who can hold the handle correctly each time.

Skip it if your main priority is a compact scale with USB-C charging. The product information describes its handle and display strengths, while it does not state a rechargeable battery system.

7. FITINDEX 8-Electrode Smart Scale is best for households with many app profiles.

FITINDEX is aimed squarely at detailed app reporting. It lists 50 body-composition measures, eight-electrode dual-frequency BIA, segmental muscle and fat analysis, and support for more than 30 user profiles.

The product describes reports for arms, trunk, and legs, along with BMI, body fat, water, protein, skeletal muscle, basal metabolic rate, bone mass, and metabolic age. It also lists compatibility with Apple Health, MyFitnessPal, and Samsung Health.

The hardware is rated at 400 pounds and uses a large platform plus a 59-inch elastic extension cable for the handle. Its stated 0.2-pound accuracy is adequate for gradual change, but it is not the tightest readout in this comparison.

The profile capacity makes FITINDEX practical for larger families or teams.

More than 30 profiles gives the companion app room for a large household without overwriting history. That is useful only when each person takes a consistent measurement; guest readings and inconsistent barefoot contact can make personal charts less meaningful.

The segmental reports can also appeal to a person tracking strength training. I would view left-right or limb readings as prompts to watch patterns, not as proof that one side changed after a single workout.

The handle posture makes repeat technique especially important.

FITINDEX directly warns that improper posture can disrupt current transmission and produce highly deviated results. That is candid and important: stand still, place hands as directed, and do not compare one rushed measurement against a carefully positioned one.

Choose it when profile capacity and app detail outweigh the appeal of a compact display-only scale. People who do not want a handle routine may be happier with Etekcity, Alcedo, or Wyze.

8. RENPHO Elis Evo is best for Wi-Fi syncing with dedicated pregnancy and athlete modes.

RENPHO Elis Evo brings Wi-Fi and Bluetooth to a rechargeable, feet-only scale format. Its TFT screen shows seven health metrics, while the RENPHO Health app records 18 total measurements, including 14 body-composition and four target metrics.

The product details list high-conductivity ITO coating, dual-frequency electrodes, and a 400-pound capacity. It also has Pregnancy, Baby, and Athlete modes, plus meal logging and calorie monitoring within the app.

At 4.6 stars from 202 reviews, it has much less review history than the established RENPHO MorphoScan Nova. I would see that as a reason to choose it for its specific Wi-Fi and mode combination, not simply for brand familiarity.

The Wi-Fi upload helps Elis Evo serve a connected health routine.

Its Wi-Fi connection allows cloud data upload, while Bluetooth provides another way to connect. That flexibility is useful if automatic logging is a priority and you would rather not open the app at the scale every time.

The large TFT display makes the current reading easier to review before you return to your phone. A visible display can be helpful, but a weekly chart remains a better lens for progress than reacting to a single result.

The specialized modes need careful interpretation.

Pregnancy Mode and Baby Mode are useful named features, but the scale’s general BIA-based body-composition readings should not be used as medical guidance. During pregnancy or with an implanted electronic medical device, follow the manufacturer’s instructions and consult a healthcare professional before using impedance features.

Elis Evo is the RENPHO pick for someone who wants Wi-Fi and a rechargeable platform without a handle. If you want segmental analysis and a more extensive review record, MorphoScan Nova is the better RENPHO fit.

9. Runstar 8-Electrode Smart Scale is best for a long stated warranty and retractable handle.

Runstar pairs eight-electrode measurement with a full-color TFT-LCD mounted on a retractable handle. It reports seven readings on the display, 28 body-composition metrics in the Starfit app, and a 400-pound capacity.

The 13 by 13 inch weighing surface is one of the roomier footprints in this group. It uses USB-C charging and supports unlimited users, with up to 24 profiles per account, so the app can accommodate frequent household use.

Its 30-month warranty is the standout ownership fact. Long-term durability is rarely explained well in roundup content, and a stated warranty period gives practical buyers a concrete support detail to compare.

The longer warranty makes Runstar a sensible durability-minded option.

A warranty does not predict a trouble-free product, but it can matter when a scale will be used every day for years. Keep the receipt and read the coverage terms, especially if the retractable handle will be moved often.

Runstar lists integration with Apple Health, Fitbit, Health Connect, and Fitdays through the Starfit app. That gives it credible ecosystem coverage for users who already record steps or workouts elsewhere.

The retractable handle keeps Runstar more compact between uses.

The handle can be stowed when not needed, which is useful in a shared bathroom. During measurement, it still requires the same consistent grip and posture as other handle-based BIA scales.

The stated 0.2-pound readout is fine for an overall weight direction but will not display every tiny shift. Choose Runstar for the warranty, broad platform, and handle screen rather than for the narrowest numerical increment.

10. GE Smart Scale is best for fast results on a bright handle display.

The GE Smart Scale is a handle model that prioritizes a quick, visible report. Its listing says it produces results in 10 to 15 seconds, displays data on a 5.3-inch color handle screen, and tracks more than 50 metrics with eight-electrode segmental BIA.

The non-slip platform measures 11.8 by 11.8 inches and has a 400-pound capacity. It also lists 0.1-pound readout accuracy, unlimited user profiles, and detailed charts and weekly reports inside the Fit Profile app.

Apple Health, Google Fit, Fitbit, Samsung Health, and Health Connect compatibility make it one of the more flexible Bluetooth app choices. The 4.4 rating from more than 1k reviews is solid, though below the leaders in this guide.

The fast screen result makes GE appealing when you do not want to bend for data.

The handle display puts results closer to eye level than a floor-only screen. That may make the routine more comfortable and lets you check the current report without immediately reaching for a phone.

Its Fit Profile app includes detailed charts and weekly reports, which are the right place to review gradual change. The fastest route to useful data is a repeatable schedule, not taking several back-to-back readings to find the most flattering result.

The stated safety warning makes GE unsuitable for some users.

The listing says the scale is not recommended for people with pacemakers or implanted electronic medical devices and is not for pregnant women. This caution is important because BIA sends a small electrical current through the body to make estimates.

If those restrictions apply, do not use BIA features without professional guidance; a regular non-BIA scale may be the appropriate choice. For eligible users who want a large screen and a fast, handle-based routine, GE is a well-rounded option.

11. Withings Body Scan is best for advanced cardiovascular and segmental health data.

Withings Body Scan is the most health-data-focused model in this lineup. It offers segmental body-composition analysis, visceral-fat information, vascular-age estimation, heart-rate evaluation at weigh-in, and a high-visibility color screen.

The listing specifies weight precision of plus or minus 0.1 pound or 50 grams, a 400-pound capacity, USB-C charging, a wall handle mount, and a two-year manufacturer warranty. Its handle-style form is designed to locate potential muscle imbalance or excess fat across body areas.

It has a 4.2 rating from more than 8k reviews, and the reviewed data mentions some owner reports of accuracy inconsistencies. That combination calls for a measured view: its advanced reports may be useful, but no scale should replace clinical assessment.

The cardiovascular metrics make Body Scan a specialty health-tracking device.

Vascular age and heart-rate readings are the features that separate Body Scan from general fitness scales. They may give a motivated user additional context, yet they should be read as consumer tracking information, not a diagnosis or treatment decision.

It is a strong fit for someone who will study longer-term reports and understands that each metric has limits. If your only goal is to watch weight decline or rise, the extra reporting may be unnecessary.

The two-year warranty supports a long-term ownership case.

Body Scan includes a two-year manufacturer warranty, longer than the one-year coverage listed for LOFTILLA and shorter than Runstar’s 30 months. Comparing stated support periods is sensible for a device intended for frequent use.

Use the same floor, time of day, hydration pattern, and stance to give the trend a fair chance to settle. The product’s 50-gram precision is useful, but normal food, fluid, and exercise changes can still move a daily reading.

12. Withings Body Comp is best for Wi-Fi health monitoring with a baby weighing feature.

Withings Body Comp is a Wi-Fi and Bluetooth smart scale positioned around a broad health view. Its listed features include clinically validated body-composition analysis, weight tracking within 50 grams, cardiovascular monitoring, a high-resolution color display, and baby weighing capability.

The scale was first available in 2023, measures 12.7 by 12.7 inches, and weighs 5.5 pounds. It uses an included AAA battery and records details through the connected Withings system.

Its 3.9 rating from more than 1k reviews is the lowest in this guide, and the analyzed reviews identify owner reports of connectivity trouble. That does not erase its feature set, but it means stable app syncing should be tested promptly during the return period.

The Wi-Fi connection makes Body Comp practical for automatic data capture.

Wi-Fi plus Bluetooth gives Body Comp two ways to connect, which can be useful in a home that wants automatic uploads. Its color display also lets you see a weight trend at the scale rather than relying on the phone for every check-in.

The Baby mode provides a stated use case for parents who want to monitor a child’s weight. Follow the product directions closely and treat it as a convenient home record rather than a substitute for pediatric care.

The lower rating makes Body Comp a feature-specific rather than default choice.

Choose Body Comp if the Wi-Fi routine, baby feature, and Withings health reporting are the reasons you are shopping. If you prioritize the strongest feedback among Wi-Fi-capable options, Wyze Scale Ultra has a larger review history and a higher rating in the supplied data.

Since some owners report connection problems, do a full setup before you depend on it for a program. Confirm that your phone, home network, and preferred health platform all record a test weigh-in the way you expect.

How To Choose The Best Smart Scales?

Buying a smart scale is less about finding the largest metric count and more about choosing a system you will use consistently. Start with the measurement type, then check capacity, app destination, profile needs, display, power source, and safety warnings.

BIA works by estimating body composition through a small electrical current.

Most models here use bioelectrical impedance analysis, or BIA. Bare feet contact electrode sensors, the scale sends a small electrical current through the body, and its algorithm estimates metrics such as body fat, muscle mass, water, bone mass, visceral fat, and BMI.

Electricity moves differently through lean tissue and fat, which gives the scale an input for its estimate. The number can change when hydration, meals, alcohol, exercise, menstrual cycle, skin temperature, or foot contact changes, even if your actual body fat has not shifted in the same way.

That is why I would use a BIA scale for directional tracking. Weigh at the same time, on the same level floor, with dry bare feet, and compare weekly or monthly patterns instead of treating a one-day body-fat result as fact.

Weight readings are generally more useful than a single body-fat reading.

A quality digital weight scale can provide a repeatable weight log when it is placed on a hard, level surface. Its body-composition outputs are estimates; they are better for checking whether a trend is broadly moving with your training and eating plan.

Do not compare one model’s body-fat percentage directly to another model’s number. Pick one scale, use it under the same conditions, and read the moving trend alongside how clothes fit, performance in the gym, measurements, and professional advice when needed.

For a clean routine, step on once after using the bathroom and before food or drink, then let the scale settle. Repeating the measurement many times just adds noise and can lead to overreacting to ordinary fluid shifts.

App compatibility should match the health record you already keep.

Bluetooth scales typically sync when a nearby phone connects; Wi-Fi scales can upload through the home network. Bluetooth can be entirely adequate for a single person who has their phone nearby, while Wi-Fi is convenient for people who want automatic transfers or several users.

For Apple Health, the verified listings name Etekcity, arboleaf, Wyze Scale Ultra, FITINDEX, RENPHO MorphoScan Nova, Runstar, and GE as compatible. RENPHO Elis Evo’s supplied feature list does not explicitly name Apple Health, so check the current companion-app support before choosing it for that ecosystem.

Keep the data flow simple. If a scale sends weight to Apple Health, Google Fit, Fitbit, Samsung Health, Health Connect, or MyFitnessPal, check for duplicate entries after setup and decide which app will be the main record.

A capacity and platform check can prevent the most obvious mismatch.

Most scales in this guide list a 400-pound capacity. Etekcity lists 330 pounds, so it is not interchangeable with the others for capacity needs even though its app support and USB-C charging are appealing.

Platform dimensions matter too. arboleaf and Runstar list 13 by 13 inch platforms, GE lists 11.8 by 11.8 inches, and Withings Body Comp lists 12.7 by 12.7 inches; a wider surface may feel steadier underfoot.

Check where the scale will live before choosing a handle model. Handle designs offer additional electrode contact and a raised display, but they require room, correct grip, and a short extra step every time you weigh.

Power and display choices determine small daily annoyances.

USB-C charging is available on Etekcity, RENPHO MorphoScan Nova, RENPHO Elis Evo, and Runstar. Rechargeable models save battery replacements, but they need a charging habit; MorphoScan Nova claims up to 150 days from a charge.

AAA-powered options such as LOFTILLA, Wyze, GE, and Withings Body Comp can be ready without a cable but need replacements. A simple LED weight display is enough for many people, while the color TFT or handle screens on Wyze, RENPHO, Runstar, GE, and Withings add more visible information.

Do not assume a larger screen means a more accurate body-fat estimate. Choose it because seeing the data easily will make you follow your routine, not because it changes the fundamental limits of BIA.

Safety and privacy questions deserve an upfront check.

People with pacemakers or other implanted electronic medical devices should not use BIA features unless a clinician and the manufacturer say it is appropriate. GE specifically says its model is not recommended for implanted electronic medical devices and is not for pregnant women, and those cautions should be taken seriously.

Pregnant users should follow the product instructions and seek medical advice before using impedance-based measurements. A standard weight-only scale is often the more appropriate option when BIA is unsuitable.

For privacy, download the official app, use a strong unique password, review the permissions it requests, and read the company’s current privacy policy before adding sensitive health details. A scale that syncs reliably is useful, but you should be comfortable with where the data goes.

FAQs

The Etekcity is the best smart scale for most people in 2026.

Etekcity is my default recommendation because it joins a rechargeable USB-C design, 0.1-pound readout, privacy feature, 13 metrics, and unusually broad health-app support in one straightforward body composition scale. Alcedo is the sensible simpler alternative, while RENPHO MorphoScan Nova, LOFTILLA, arboleaf, FITINDEX, Runstar, and GE make stronger cases when a handle or segmental reporting matters.

Choose Wyze or RENPHO Elis Evo when Wi-Fi syncing is the habit you need, and reserve Withings models for buyers who will genuinely use their advanced health data. Whichever model you select, measure under the same conditions, protect your app account, respect BIA safety warnings, and let several weeks of data tell the story.