# AB BMI Plus vs Watch Heartbeat

The clearest difference is update cadence: Watch Heartbeat at every 3 weeks against AB BMI Plus's every 3 months. Watch Heartbeat also leads on iOS requirement (13.0 vs 16.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AB BMI Plus ships an update every 3 months, Watch Heartbeat every 3 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | AB BMI Plus | Watch Heartbeat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 9 MB | 3 MB |
| Requires iOS | 16.5 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPod, Apple Watch** |
| Age rating | +4 | 4+ |
| Developer | [Alexander Berkovich](https://appshunter.io/developer/1460157188) | [Super Tools Technology Co., Limited](https://appshunter.io/developer/1565672297) |

## What reviewers say

### AB BMI Plus

[App page](https://appshunter.io/ios/app/ab-bmi-plus/id1622389050)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Watch Heartbeat

[App page](https://appshunter.io/ios/app/watch-heartbeat/id6733222459)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is AB BMI Plus free?

AB BMI Plus is free to download, with no in-app purchases.

### Is Watch Heartbeat free?

Watch Heartbeat is free to download, with no in-app purchases.

### Do AB BMI Plus or Watch Heartbeat have ads?

Neither AB BMI Plus nor Watch Heartbeat shows ads.

### Which is updated more often, AB BMI Plus or Watch Heartbeat?

AB BMI Plus ships an update every 3 months, and Watch Heartbeat every 3 weeks. Most recently, AB BMI Plus was updated on November 7, 2026 and Watch Heartbeat on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*