# PhysiqueAI - AI Body Fat Estimates From a Photo

> A convenient way to estimate body fat percentage from a phone photo and track the trend over time. No equipment, no appointments.

PhysiqueAI is a web and iOS app that estimates body fat percentage from a photo. A third-party, general-purpose AI vision model rates visible features (muscle definition, proportions), and the app combines that with published BMI-based body fat equations (Deurenberg 1991; CUN-BAE 2012) using the user's height, weight, age, and sex. Analysis usually takes 10-30 seconds.

Results are AI visual estimates, not medical measurements. PhysiqueAI has not run a validation study against DEXA, so it does not claim a specific accuracy. Estimates are best used to follow your own trend across several scans taken with consistent photos (same lighting, pose, and time of day).

## Key Features

### Body Composition Estimates
- Estimated body fat percentage from a photo
- Estimated muscle mass, lean mass, and fat mass (derived from the body fat estimate)
- Confidence score for each scan

### Progress Tracking
- Scan history and trend charts
- Goal tracking toward a target body fat percentage
- Streaks and badges
- Export your data anytime (JSON)

### AI Features (Premium)
- AI coaching insights after each scan
- Vision: AI-generated, illustrative preview of you at a goal body fat (motivational, not a prediction)
- Weekly progress email

### Privacy
- Photos encrypted in transit and at rest
- Photos are sent to our AI provider for analysis; our admin tools don't show photos to our team
- Optional automatic photo deletion after each scan
- Delete all your data at any time

## Pricing

| Plan | Cost | Body scans | Results |
|------|------|------------|---------|
| Free | $0 | Can scan | Blurred until you upgrade |
| Premium | $12.99/month or $59.99/year | Unlimited | Full results, full history, AI coaching, Vision |

- Creating a free account doesn't require a credit card.
- There is no free trial, on the web or in the iOS app. You're charged when you subscribe.
- Subscriptions renew automatically; cancel anytime.

## How It Works

1. **Snap** - Take a mirror photo with your phone
2. **Upload** - Select or capture your photo in the app
3. **Analyze** - Usually 10-30 seconds
4. **Track** - Follow your trend over time

Best practice: scan about once a week at the same time of day, with similar lighting and pose. Daily scans mostly pick up noise from water weight and lighting.

## Body Fat Percentage Categories (ACE)

| Category | Men | Women |
|----------|-----|-------|
| Essential fat | 2-5% | 10-13% |
| Athletes | 6-13% | 14-20% |
| Fitness | 14-17% | 21-24% |
| Acceptable | 18-24% | 25-31% |
| Obesity | over 25% | over 32% |

Source: American Council on Exercise, Percent Body Fat Calculator (archived): http://web.archive.org/web/20201224091844/https://www.acefitness.org/education-and-resources/lifestyle/tools-calculators/percent-body-fat-calculator/

## How Other Methods Compare (published research)

- **DEXA:** A common reference method, but also an estimate: against a five-compartment lab model, standard error of about 3 percentage points (Sullivan et al., J Clin Densitom 2022, https://pubmed.ncbi.nlm.nih.gov/34756706/). Usually paid out of pocket; university labs charge about $75-$125 (e.g. https://www.boisestate.edu/humanperformance/body-composition-test/, https://eslab.ehe.osu.edu/body-composition/).
- **US Navy tape method:** About 4-6 percentage points from DEXA (RMSE) in 1,904 soldiers (Taylor et al., Obes Sci Pract 2024, https://pmc.ncbi.nlm.nih.gov/articles/PMC11026907/).
- **Skinfold calipers:** Standard error of about 3.5 percentage points; depends on the tester's skill (ACE, link above).
- **Consumer smart scales (bioimpedance):** About 3-6 percentage points from DEXA on average (Majmudar et al., npj Digit Med 2022, https://pubmed.ncbi.nlm.nih.gov/35768575/; Ferreira et al., npj Digit Med 2025, https://pubmed.ncbi.nlm.nih.gov/39827323/). Sensitive to hydration (Kyle et al., Clin Nutr 2004, https://pubmed.ncbi.nlm.nih.gov/15556267/).
- **Photo-based AI methods (other apps):** Studies of other smartphone-photo methods found average errors of about 1.5-2.2 percentage points vs DEXA, with individual results off by 5 points or more (Majmudar 2022; Ferreira 2025). These studies did not test PhysiqueAI.
- **PhysiqueAI:** Free account; Premium $12.99/month. Scan anywhere, results in under a minute. Accuracy not independently validated.

## Pages & Resources

- [Homepage](https://www.usephysiqueai.com) - Overview
- [Body Fat Calculator](https://www.usephysiqueai.com/body-fat-calculator) - Free US Navy tape-measure calculator
- [AI Body Fat Calculator](https://www.usephysiqueai.com/ai-body-fat-calculator) - About photo-based body fat estimates
- [AI Coach](https://www.usephysiqueai.com/ai-coach) - AI coaching insights
- [Progress Tracking](https://www.usephysiqueai.com/progress-tracking) - Body transformation tracker
- [TDEE Calculator](https://www.usephysiqueai.com/tdee-calculator) - Free total daily energy expenditure calculator
- [Macro Calculator](https://www.usephysiqueai.com/macro-calculator) - Protein, carbs, and fat targets
- [One Rep Max Calculator](https://www.usephysiqueai.com/one-rep-max-calculator) - Estimate your 1RM
- [Lean Body Mass Calculator](https://www.usephysiqueai.com/lean-body-mass-calculator) - Lean body mass estimates
- [FFMI Calculator](https://www.usephysiqueai.com/ffmi-calculator) - Fat-Free Mass Index
- [Ideal Weight Calculator](https://www.usephysiqueai.com/ideal-weight-calculator) - Ideal weight formulas
- [BMI Calculator](https://www.usephysiqueai.com/bmi-calculator) - Body Mass Index
- [Body Fat Percentage Chart](https://www.usephysiqueai.com/body-fat-percentage-chart) - Body fat categories
- [Calorie Deficit Calculator](https://www.usephysiqueai.com/calorie-deficit-calculator) - Calories for weight loss
- [Waist to Hip Ratio Calculator](https://www.usephysiqueai.com/waist-to-hip-ratio-calculator) - WHR
- [Body Recomposition Calculator](https://www.usephysiqueai.com/body-recomposition-calculator) - Recomp planning
- [Features](https://www.usephysiqueai.com/features) - Feature breakdown
- [Pricing](https://www.usephysiqueai.com/pricing) - Plan comparison
- [Blog](https://www.usephysiqueai.com/blog) - Articles by the PhysiqueAI Team
- [About](https://www.usephysiqueai.com/about) - What we built and how it works
- [Privacy Policy](https://www.usephysiqueai.com/privacy)
- [Terms of Service](https://www.usephysiqueai.com/terms)
- [Contact](https://www.usephysiqueai.com/contact)

## Common Questions

**Q: Is PhysiqueAI accurate?**
A: It gives an AI visual estimate, not a medical measurement, and it hasn't been validated against DEXA. It's designed for following your trend with consistent photos. For a clinical measurement, see a provider who offers DEXA.

**Q: How often should I scan?**
A: About once a week, same time of day. Daily measurements add noise; body fat doesn't change that fast.

**Q: What if I'm self-conscious about photos?**
A: Photos are encrypted and sent to our AI provider for analysis; our admin tools don't show them to our team. You can turn on automatic deletion after each scan, or delete everything anytime.

**Q: Does it work for all body types?**
A: It's designed for adults of any fitness level, but because the estimate is visual, it can be less reliable at very low or very high body fat, or when clothing or lighting hides your shape.

## Get Started

Visit [usephysiqueai.com](https://www.usephysiqueai.com) to create a free account and try a scan. Full results require Premium.

## Contact

- Website: https://www.usephysiqueai.com
- Email: support@usephysiqueai.com