Best body fat apps of 2026: photo scanners compared

Reviewed by Andrew Menechian, Head of Fitness

The best body fat app depends on what you want next to the number. If you want a three-photo body fat number with food and workouts in one iPhone app, that is FitCommit. If you want 3D posture and 20+ metrics on a Face ID iPhone, pick Bodymapp. If you want research-backed scanning, pick Spren. On Android, pick Zing AI. For a progress photo timeline, pick GainFrame. For the lowest yearly price, pick trackBod. For a scan inside a workout planner, pick FitnessAI.

This guide is built from each app's own App Store page and website, not from hands-on testing. Prices are US App Store lists, checked November 2026.

Which app estimates body fat from a photo?

Five apps here work from ordinary phone photos: FitCommit, GainFrame, trackBod, Zing AI and Spren. Bodymapp and FitnessAI BodyScan use a 3D scan from the iPhone instead. Bodymapp needs the Face ID sensor.

The table shows how each app measures, which phones it runs on, what it costs and who it suits. Where a rival's listing does not state a free trial, the table says so.

How accurate are body fat apps?

We did not test accuracy, and we do not rank these apps by it. Every accuracy figure you will see in this space comes from the company that makes the app, so treat it as a claim, not a result.

Here is what each company says. Spren lists peer-reviewed validation studies, and its site says 122 universities and research labs use it. We did not review the studies. FitnessAI says BodyScan is "nearly as accurate as a DEXA scan." That is a company claim. GainFrame calls its numbers estimates and says more poses make them more precise. Bodymapp's accuracy figures are the company's own.

FitCommit's line is: "As precise as an InBody scan, not a DEXA scan." For how DEXA, InBody and other methods differ, read our body fat testing guide. To see where FitCommit and an InBody scan sit side by side, read FitCommit vs InBody.

Free vs paid body fat apps

All seven apps are free to download. Each also lists paid plans, and we did not verify what any free tier includes. Do not assume a free download gives you a scan.

Three things change the real cost:

• Trials. FitCommit has a free 3-day trial. GainFrame and trackBod do not state a trial on their listings.
• Add-ons. Zing AI sells its Body Scan Report separately, on top of Premium. Spren lists paid add-ons.
• Plan spread. Most apps list several prices for the same period. The table shows the range.

For a wider list of options beyond these seven, see FitCommit alternatives. If food tracking matters more to you than the scan, read how to choose a paid nutrition app.

The seven apps, one by one

FitCommit

FitCommit is an iPhone app with four features: Body Scan, Future You, Nutrition and Workouts. Body Scan gives you body fat as one whole number from three guided photos, plus lean mass and fat mass. The precision line is: "As precise as an InBody scan, not a DEXA scan."

Future You is an illustration of your body at your goal, based on following your plan. It is not a promise of results.

Strength: the scan, food and workouts live in one app. Limit: it is iPhone only and not on Android. Price: a free 3-day trial, then $1.99 a week (about $8/month). An annual plan is $39.99 a year. FitCommit on the US App Store. Checked November 2026.

GainFrame

GainFrame is a progress photo app. Its strength is the timeline: side-by-side photo compare, 12 muscle groups, and links to Apple Health, Hevy and Strava. Its App Store page shows 4.9 from 73 ratings.

It reads body fat from photos and says more poses make the figure more precise. It calls those figures estimates, and it also offers "Future You physique projections." It is on iPhone, and we found no Google Play listing. Pro costs $3.99 to $9.99 a week, $5.99 to $7.99 a month or $39.99 to $49.99 a year. Trial not stated. Note that a different app with the same name exists on the App Store. We mean GainFrame: Gym Progress Photos from gainframe.app. Checked November 2026.

trackBod

trackBod takes front and side photos plus a few questions. Its strength is a simple flow, and its App Store page shows 4.7 from 1,105 ratings. Its yearly plans start at $29.99, the lowest yearly entry price on this list.

The limit: analysis needs a subscription, so there are no results without paying, and no website is listed. Plans are $3.99 to $9.99 a week, $9.99 a month or $29.99 to $59.99 a year. Trial not stated. iPhone only, with no Google Play listing found. trackBod on the US App Store. Checked November 2026.

Bodymapp

Bodymapp does a 3D scan with the iPhone TrueDepth sensor, the same hardware as Face ID. Its strength is depth: 20+ body metrics plus posture. For a side-by-side with FitCommit, see FitCommit vs Bodymapp.

The limits: it needs an iPhone X or later (not the SE) on iOS 17 or newer, and its accuracy figures are the company's own. Premium is $19.99 a month, $29.99 a quarter or $49.99 a year. Bodymapp on the US App Store and bodymapp.co. Checked November 2026.

Spren

Spren scans from a full-body phone camera photo. Its strength is evidence: it lists peer-reviewed validation studies, and its site says 122 universities and research labs use it. We did not review the studies. See FitCommit vs Spren for a direct comparison.

The limit: many plans and add-ons make it hard to compare. Listed prices run $14.99 to $19.99 a month, $59.99 a quarter and $69.99 to $119.99 a year, plus paid add-ons. iPhone only, with no Google Play listing found. Spren on the US App Store and spren.com. Checked November 2026.

Zing AI

Zing AI is a workout app first. Its strength is camera form feedback and almost 500 exercises, and it is the Android option on this list: it runs on iPhone and Android. Its body scan uses front and side photos in a Body Scan Report. See FitCommit vs Zing AI.

The limit: the scan costs extra. Premium is $18.99 to $59.99 depending on the period, and the Body Scan Report is a separate $19.99 purchase. Zing AI on the US App Store and on Google Play (coach.zing.fitness). Checked November 2026.

FitnessAI BodyScan

FitnessAI BodyScan uses a 3D scan with the iPhone camera. Its strength is the plan around it: it comes with AI workout planning. See FitCommit vs FitnessAI BodyScan.

The limits: BodyScan is an add-on to a workout app, and the "nearly as accurate as a DEXA scan" line is the company's own claim. BodyScan is $9.99 a month on its site. The app lists $3.99 a week, $9.99 to $19.99 a month and $59.99 to $89.99 a year. The workout app is also on Android, but we could not verify BodyScan there. fitnessai.com/bodyscan and FitnessAI on the US App Store. Checked November 2026.

How we compared

FitCommit publishes this guide, so we held ourselves to the same rules as everyone else. We list FitCommit's limits next to its strengths, and we name a real strength for each rival.

• Sources. Each app's own App Store page and website. No review sites.
• What we compared. How it measures, which phones it runs on, the US price, and what it does well.
• Prices. US App Store in-app purchase lists in USD. Apps list several prices for the same period, so we show ranges. If a source did not state a trial, we say "trial not stated."
• Claims. When a company says its scan is validated or close to DEXA, we attribute it to the company.
• What we did not do. We did not run hands-on accuracy tests.

Prices and features change. Each app section shows the month we checked.

FAQ

Can an app measure body fat from a photo?

Yes, several apps return a body fat figure from photos. FitCommit, GainFrame, trackBod, Zing AI and Spren work from photos. Bodymapp and FitnessAI use 3D scans from the iPhone. Each app uses its own method, so compare readings within one app over time rather than across apps.

Which body fat app is most accurate?

We did not test accuracy, so we do not name a winner. Accuracy figures on this list are each company's own claims. Spren lists peer-reviewed validation studies. FitCommit says: "As precise as an InBody scan, not a DEXA scan." Ask any app what its number was compared against before you trust it.

Is there a free body fat app?

All seven apps are free to download, but each lists paid plans, and we did not verify what any free tier includes. FitCommit has a free 3-day trial, then $1.99 a week. GainFrame and trackBod do not state a trial on their listings. Check the plan before you scan.

Body fat app vs smart scale: which is better?

A smart scale measures at home from a device you stand on. A photo app reads your body from pictures and needs no extra hardware. They use different methods, so their numbers may not match. Pick one tool, use it the same way each time, and follow your own trend. Our body fat testing guide compares the main methods.

Is there a body fat app for Android?

Zing AI is the clear Android option here: it runs on iPhone and Android, and its Body Scan Report is a separate $19.99 purchase. FitnessAI's workout app is on Android, but we could not verify BodyScan there. The other five are iPhone only, as far as we found.

How often should I scan?

Once a week or every two weeks works well. FitCommit lets you scan once every 7 days. Scan at the same time of day, in the same light and clothing. Compare with your last scan, not yesterday's. Scan when you can act on the result.