# BMI Calculator vs WatchBMI

The clearest difference is price: BMI Calculator at Free against WatchBMI's $0.99. WatchBMI's advantage is ads (none vs shown) and update cadence (daily vs every 11 days). On in-app purchases, device support and iOS requirement there is nothing between them.

BMI Calculator is free to download; WatchBMI costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BMI Calculator ships an update every 11 days, WatchBMI daily. The most recent releases landed on October 13, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | BMI Calculator | WatchBMI |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/bmi-calculator-weight-control/id6455786045/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 days | **Daily** |
| Monetization | Ad-supported | — |
| Size | 31 MB | 0 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Bosusoft](https://appshunter.io/developer/1700147552) | [James Nachbar](https://appshunter.io/developer/1755655828) |

## What reviewers say

### BMI Calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-weight-control/id6455786045)

Calculate your Body Mass Index (BMI) using your weight and height to estimate body fat and assess health risks. This tool supports weight loss programs and offers metric and imperial system options.

**Highlights:** BMI calculation, Weight tracking, Metric and imperial system support, Health risk assessment, Weight loss program aid

**Features:** macOS Compatibility

**In-app purchases:** none


### WatchBMI

[App page](https://appshunter.io/ios/app/watchbmi/id6514276372)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is BMI Calculator free?

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

### Is WatchBMI free?

WatchBMI costs $0.99, with no in-app purchases.

### Do BMI Calculator or WatchBMI have ads?

BMI Calculator shows ads; WatchBMI does not.

### Which is updated more often, BMI Calculator or WatchBMI?

BMI Calculator ships an update every 11 days, and WatchBMI daily. Most recently, BMI Calculator was updated on October 13, 2026 and WatchBMI on October 27, 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.*