# BFI by Stayhealthy — Measure, track, and change

> Phone-based body composition analysis, activity tracking, and AR health education. (iPhone/iPad app by Stayhealthy.)

- Source: https://appshunter.io/ios/app/bfi-by-stayhealthy/id1462106901 (this page in markdown: same URL + `.md`)
- Developer: [Stayhealthy](https://appshunter.io/developer/1435974933)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.00/5 from 7 App Store ratings
- Age rating: 17+
- Requires: iOS 12.4 · 88 MB
- Languages: English
- Released: 2019-06-06
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/bfi-by-stayhealthy/id1462106901/reviews.md

## What is BFI by Stayhealthy?

Have you heard of BFI? Body Fact Index is the first true innovation in body composition since the highly inaccurate BMI was developed in the 1830's. BFI predicts your body fat and lean mass percentages, is up to 98% accurate, and does not require any wearables - you just need your phone.

In addition to calculating and tracking your body fat percentage, this app also provides medical grade activity tracking technology to track your movement and calories burned more accurately than any other device or app in the market - all with just your phone!

You can also learn about your health and wellbeing through our engaging augmented reality (AR) experiences and the Daily Stayhealthy Fact.

To help turn the tide on the obesity epidemic and get people involved, we're also giving away free prizes every month to our users. Be sure to download the app today.

No matter what your health goals are - from losing weight and increasing activity to preventing cancer - Stayhealthy's BFI app is here to help you. Our patented algorithms and engaging visual tools are sure to help you meet your fitness goals, and track and change your life for the better. 

If you are a member of one of the following employee wellness programs, you may qualify for premium app access at no extra charge: Attentive Health and Wellness. Check with your wellness program today.

In-app purchases: In-app purchases are available to unlock access to premium features after the first 30 days of complimentary access. Premium features include the Activity Tracker, AR experiences, and Prizes. If you decide to not upgrade to Premium after the first 30 days, the BFI and Daily Health Fact will still be available at no cost.

The Premium purchase options available are: 
1) "Unlock Premium content (monthly)": a monthly auto-renewable subscription for a price of $1.99/month, which will renew each month. 
Or 
2) "Unlock Premium content (yearly)": an annual auto-renewable subscription for a price of $19.99/year, which will renew each year. 

Subscription will be charged to your Apple ID account at the confirmation of purchase. The subscription will automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription by going to your account settings on the App Store after purchase. Terms of Use can be found here: https://www.stayhealthy.com/bfi-terms.html.

## Key features

- Body fat percentage measurement
- Lean mass percentage calculation
- Phone-based accuracy
- Medical-grade activity tracking
- Calorie burn estimation
- Augmented reality health experiences

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium (Yearly) | $19.99 | per year |
| Premium (Monthly) | $1.99 | per month |



## Frequently asked questions about BFI by Stayhealthy

### How accurate is BFI's body fat measurement?

BFI boasts up to 98% accuracy in predicting body fat and lean mass percentages, offering a significant innovation over older methods like BMI.

### Does BFI require any special devices to work?

No, BFI is designed to work using just your phone, eliminating the need for any wearables for its core body composition measurements.

### What kind of activity tracking does BFI offer?

BFI provides medical-grade activity tracking technology to monitor your movement and calories burned more accurately than many other devices or apps.

### Can I access premium features for free?

You receive 30 days of complimentary access to premium features. After this period, premium features like the Activity Tracker, AR experiences, and Prizes require a subscription.

### What are the subscription options for BFI Premium?

You can choose between a monthly subscription for $1.99/month or a yearly subscription for $19.99/year to unlock premium content.

### How do I manage or cancel my BFI subscription?

You can manage and cancel your subscription by going to your account settings on the App Store after purchase. Cancellations must be made at least 24 hours before the end of the current period.

### Is BFI suitable for all ages?

BFI has an age rating of 17+, indicating it is intended for adult users.

### Does BFI offer any incentives for users?

Yes, BFI gives away free prizes every month to its users as part of an initiative to combat the obesity epidemic and encourage participation.

## Version history (last 5 releases)

### 1.3.1 — 2020-06-11

-Minor fixes and performance improvements.

### 1.3.0 — 2020-01-14

-Bug fixes and performance improvements.

### 1.2.3 — 2019-08-02

-Bug fixes and performance improvements.

### 1.2.2 — 2019-07-20

-Addition of other wellness program options.
-Minor feature enhancements.

### 1.2.1 — 2019-07-08

-Minor enhancements and fixes.

## Apps similar to BFI by Stayhealthy

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Weighed](https://appshunter.io/ios/app/weighed/id1464576107) | 5.0 (2) | Free | Health & Fitness |
| [My Heart Visit](https://appshunter.io/ios/app/my-heart-visit/id1559983298) | — | Free | Health & Fitness |
| [Trainalyzer](https://appshunter.io/ios/app/trainalyzer/id1563533987) | 5.0 (4) | Free | Health & Fitness |
| [Body Heat Pro: Health Tracker](https://appshunter.io/ios/app/body-heat-pro-health-tracker/id6448482916) | 4.4 (30) | $0.99 | Health & Fitness |
| [Powerplantbody Fitness App](https://appshunter.io/ios/app/powerplantbody-fitness-app/id1329104353) | 5.0 (3) | Free | Health & Fitness |
| [BSF Fitness](https://appshunter.io/ios/app/bsf-fitness/id1529171556) | 5.0 (33) | Free | Health & Fitness |

## More apps by Stayhealthy

- [Color Quest AR](https://appshunter.io/ios/app/color-quest-ar/id1435974934)
- [OWL Cancer Survivor Platform](https://appshunter.io/ios/app/owl-cancer-survivor-platform/id1486526954)
- [Color Quest: Memory Game](https://appshunter.io/ios/app/color-quest-memory-game/id1509556219)
- [Diet Free Life App](https://appshunter.io/ios/app/diet-free-life-app/id1514697023)
- [Les Paul](https://appshunter.io/ios/app/les-paul/id1573019686)

All apps by Stayhealthy: https://appshunter.io/developer/1435974933

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*