---
title: Best AI Body Fat Apps (2026): 9 Scanners Compared Honestly
url: https://progresslens.app/best-ai-body-fat-apps/
language: en
updated: 2026-11-13
---

# The best AI body fat apps in 2026, compared honestly

By the [ProgressLens team](https://progresslens.app/about/) · Updated November 13, 2026

Nine apps that estimate body fat or body shape from your phone camera, what each is good at, and why consistency matters more than any single scan.

Short answer

The best AI body fat app for tracking is ProgressLens, because it combines an AI read of your photos with tape measurements and your history, so the estimate stays consistent, and it runs on iPhone and Android in 11 languages. GainFrame (iPhone, English) has the broadest feature set; trackBod and LeanLens are quick one-photo scans; bodyfatAI also runs on Android.

**On this page**
- [Quick comparison](#quick)
- [The apps](#apps)
- [Which to pick](#verdict)
- [FAQ](#faq)

**Disclosure:** we make ProgressLens. Details about other apps come from their own store listings and websites as of November 2026; prices and features change, so check the listing before you pay. We name each app’s weaknesses and our own.

## Quick comparison

| App | Platforms | What it estimates | Price model |
| ProgressLens | iPhone, iPad, Android | Body-fat range from photos + tape + history; fat vs muscle; verdict | $39.99/year |
| GainFrame | iPhone, iPad (no Android) | AI body fat, FFMI, physique and muscle-group scores from photos, AI coach | Subscription (listing shows weekly, monthly and $39.99–49.99 yearly tiers) |
| trackBod | iPhone | AI body scan from front and side photos: body fat, muscle ratings, physique card | Weekly or yearly subscription |
| LeanLens | iPhone (App Store) | Body-fat range and physique rating from one photo, more angles optional, AI comparison of two scans | Free download with paid features |
| bodyfatAI | iPhone, Android | AI body fat and muscle estimates from several photos, monthly analytics | Monthly or yearly subscription |
| Spren | iPhone | Phone-camera body composition scan with PDF reports and AI coaching | Subscription (one of the pricier options) |
| MeThreeSixty | iPhone, Android | 3D avatar from front and side photos, body fat and lean mass, GLP-1 dose tracking | Free with Premium subscription |
| ZOZOFIT | iPhone, some Android phones | 3D body scan with 16 measurements, posture and GLP-1 logs | Free plan; Premium monthly, yearly or lifetime |
| Recomp AI | iPhone | 3D scan from photos: body fat, lean mass, circumferences | Weekly or yearly subscription |

## The apps

### 1. ProgressLens

- iPhone, iPad, Android
- AI Progress Report
- Free download, Pro in-app
- 11 languages
- No account

**Best for:** tracking body fat over time and knowing what to do next, on any phone, in 11 languages.

The only app here that combines an AI read of your photos with the US Navy tape-measure formula and your own history. That’s why its estimate stays steady from week to week (the same photos always give the same result), and each report adds what changed, a fat vs muscle signal and a cut or bulk verdict.

#### Good

- AI Analyze: body-fat range, what changed, fat vs muscle, cut or bulk verdict
- Reads photos and tape measurements together, so estimates stay consistent
- Same app and AI on iPhone and Android, in 11 languages
- No account; photos stay on your phone, analyzed photos aren’t stored or used for training
- Ghost overlay of your last photo, six measurements with charts

#### Watch out

- No calorie, workout or dose tracking
- No video timelapse export (use our free web tool)
- No Apple Health or Health Connect sync
- No app-specific passcode (use your phone’s lock)

[Get ProgressLens →](https://progresslens.app/ai-body-fat-from-photo-and-tape-measure/)

### 2. GainFrame

- iPhone, iPad (no Android)
- Subscription (listing shows weekly, monthly and $39.99–49.99 yearly tiers)

**Best for:** iPhone users who want body fat, 12 muscle-group scores and a chat coach in one app.

An AI-first physique app for iPhone with body fat estimates, 12 muscle-group scores and a chat coach. AI body fat, FFMI, physique and muscle-group scores from photos, AI coach.

#### Good

- Broad AI feature set
- Body fat trends over time

#### Watch out

- iPhone only
- English only
- Photos sent to an AI service

[Full comparison →](https://progresslens.app/compare/progresslens-vs-gainframe/)

### 3. trackBod

- iPhone
- Weekly or yearly subscription

**Best for:** a fast two-photo scan with muscle ratings.

A front-and-side photo scan that estimates body fat and rates muscle groups. AI body scan from front and side photos: body fat, muscle ratings, physique card.

#### Good

- Simple scan
- Large user base (about 1,100 ratings)

#### Watch out

- iPhone only
- Subscription

[Full comparison →](https://progresslens.app/compare/progresslens-vs-trackbod/)

### 4. LeanLens

- iPhone (App Store)
- Free download with paid features

**Best for:** a one-photo body-fat range and physique rating.

An AI body analysis app that gives a body-fat range and physique rating from a photo. Body-fat range and physique rating from one photo, more angles optional, AI comparison of two scans.

#### Good

- Shows a range

#### Watch out

- New, few ratings

[Full comparison →](https://progresslens.app/compare/progresslens-vs-leanlens/)

### 5. bodyfatAI

- iPhone, Android
- Monthly or yearly subscription

**Best for:** Android or iPhone users who want multi-photo AI estimates.

Multi-photo AI body fat scans with monthly muscle analytics and a leaderboard. AI body fat and muscle estimates from several photos, monthly analytics.

#### Good

- On Android too
- Monthly muscle analytics

#### Watch out

- Account required
- Subscription

[Full comparison →](https://progresslens.app/compare/progresslens-vs-bodyfatai/)

### 6. Spren

- iPhone
- Subscription (one of the pricier options)

**Best for:** a detailed one-off composition report.

A guided body composition scan with lean mass, fat mass and a downloadable report. Phone-camera body composition scan with PDF reports and AI coaching.

#### Good

- PDF reports
- Lean and fat mass

#### Watch out

- iPhone only
- Expensive subscription

[Full comparison →](https://progresslens.app/compare/progresslens-vs-spren/)

### 7. MeThreeSixty

- iPhone, Android
- Free with Premium subscription

**Best for:** a 3D avatar and GLP-1 dose log.

A 3D body scanning app that builds an avatar from two photos. 3D avatar from front and side photos, body fat and lean mass, GLP-1 dose tracking.

#### Good

- 3D avatar
- Listing says photos stay on device

#### Watch out

- Pose detection can be strict for larger bodies (per reviews)

[Full comparison →](https://progresslens.app/compare/progresslens-vs-methreesixty/)

### 8. ZOZOFIT

- iPhone, some Android phones
- Free plan; Premium monthly, yearly or lifetime

**Best for:** circumference measurements from a 3D scan.

A 3D body scanner focused on circumference measurements rather than photos. 3D body scan with 16 measurements, posture and GLP-1 logs.

#### Good

- 16 measurements
- Lifetime option

#### Watch out

- Not a body fat estimate from photos
- Limited Android devices

[Full comparison →](https://progresslens.app/compare/progresslens-vs-zozofit/)

### 9. Recomp AI

- iPhone
- Weekly or yearly subscription

**Best for:** 3D scans for a recomposition phase.

A 3D scanner for recomposition with side-by-side scan comparisons. 3D scan from photos: body fat, lean mass, circumferences.

#### Good

- Side-by-side 3D comparisons

#### Watch out

- iPhone only
- Weekly plans; reviewers report billing friction

[Full comparison →](https://progresslens.app/compare/progresslens-vs-recomp-ai/)

## Which should you pick?

- Consistent estimate + a decision, any phone: ProgressLens.
- Most AI features on iPhone: GainFrame.
- Quick scan: trackBod or LeanLens.
- 3D avatar: MeThreeSixty.

## See how far you’ve come.

Take a check-in, tap AI Analyze and get your Progress Report: body-fat range, what changed, fat or muscle, and whether to cut or bulk. On iPhone, iPad and Android, with no account. Your photos stay on your phone.

**See also:** [Is GainFrame on Android?](https://progresslens.app/gainframe-android/) · [Apps like GainFrame](https://progresslens.app/apps-like-gainframe/) · [Best body scan apps](https://progresslens.app/best-body-scan-apps/) · [Body scan apps for Android](https://progresslens.app/body-scan-app-android/)

FAQ

## Frequently asked questions

**What is the best AI body fat app?**

For tracking change, ProgressLens: it combines an AI photo read with tape measurements and your history, so the estimate is consistent, and it runs on iPhone and Android. GainFrame is the broadest iPhone-only option; trackBod and LeanLens are quick one-photo scans.

**What is the most accurate AI body fat app?**

No app publishes an independent accuracy study for its photo estimates. Purpose-built smartphone methods show errors of about 3–4.5 points against DEXA in controlled conditions. Apps that add tape measurements, like ProgressLens, are more consistent, which matters most for tracking.

**Can ChatGPT estimate body fat from a photo?**

Roughly, but answers vary between chats. In our Reddit analysis, estimates from different AIs for the same person differed by 2 to 8 points. See [ProgressLens vs ChatGPT](https://progresslens.app/compare/progresslens-vs-chatgpt/).

**Is there a free AI body fat app?**

Most offer a free first scan and charge after that. A free, non-AI starting point: our [body fat estimator](https://progresslens.app/tools/body-fat-estimator/) runs in your browser and costs nothing.

**Do AI body fat apps work on Android?**

Some do: ProgressLens, bodyfatAI and MeThreeSixty. GainFrame, trackBod and Spren are iPhone-only.

## Sources

- App Store and Google Play listings for each app, accessed November 2026
- ProgressLens, [What lifters ask about body fat](https://progresslens.app/research/what-lifters-ask-about-body-fat/), November 2026

---
ProgressLens is an AI progress photo app for iPhone, iPad and Android that turns your check-in photos and tape measurements into a Progress Report: your body-fat range, what changed, whether you are losing fat or muscle, and whether to cut, lean bulk, recomp or maintain.
App Store: https://apps.apple.com/app/progresslens/id6806300575
Google Play: https://play.google.com/store/apps/details?id=app.progresslens