# BMI Calculator・Weight Tracker vs WatchBMI

The clearest difference is price: BMI Calculator・Weight Tracker at Free against WatchBMI's $0.99. WatchBMI's advantage is in-app purchases (none vs 5) and update cadence (daily vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

BMI Calculator・Weight Tracker is free to download; WatchBMI costs $0.99 up front. BMI Calculator・Weight Tracker sells 5 in-app purchases, starting at $9.99 per month. WatchBMI asks for nothing beyond the download.

BMI Calculator・Weight Tracker ships an update every 2 months, WatchBMI daily. The most recent releases landed on September 13, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | BMI Calculator・Weight Tracker | WatchBMI |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.8 (508 ratings)](https://appshunter.io/ios/app/bmi-calculatorweight-tracker/id1560499972/reviews)** | — |
| Number of ratings | **508** | — |
| Positive reviews | 84.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Freemium | — |
| Size | 53 MB | 0 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 17+ | 17+ |
| Developer | [AboutMe Apps, Inc.](https://appshunter.io/developer/1088980079) | [James Nachbar](https://appshunter.io/developer/1755655828) |

## What reviewers say

### BMI Calculator・Weight Tracker

[App page](https://appshunter.io/ios/app/bmi-calculatorweight-tracker/id1560499972)

Easily calculate your Body Mass Index (BMI) and track your weight progress. Visualize your trends with graphs, gain predictive insights, and set goals for your health journey. Supports metric and imperial systems, with Apple Watch integration.

**Highlights:** BMI Calculation, Weight Tracking, Metric and Imperial Systems, Apple Watch Integration, Graphs and Stats, Predictive Insights

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monitor your weight & progress | $9.99 | per month |
| Monthly Premium | $9.99 | per month |
| Predict your future weight＋BMI | $19.99 | per year |
| Premium Year | $19.99 | per year |
| Premium 3 Months | $19.99 | per 3 months |

**What reviewers like**

- 👍 Simple and easy-to-use interface
- 📊 Effective weight tracking and logging
- 🎨 Aesthetically pleasing design
- ⚡ Quick daily input process
- 🏥 Integrates with Apple Health

**What reviewers complain about**

- 🐛 App crashes after recent updates
- 🐛 App won't open on iOS 17.5.1
- 😔 Potentially negative psychological impact with BMI labels
- 🎨 Loss of color customization options

**Reported bugs**

- App stopped working after June 2024 update
- Crashes on iPad Air (5th Generation) with iOS 17.5.1
- Unable to open app on latest iOS versions
- App fails to launch after recent updates

**Requested features**

- Restore different color options for tracking
- More sensitive language for BMI categorization


### WatchBMI

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

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is BMI Calculator・Weight Tracker free?

BMI Calculator・Weight Tracker is free to download, with in-app purchases available.

### Is WatchBMI free?

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

### Do BMI Calculator・Weight Tracker or WatchBMI have ads?

Neither BMI Calculator・Weight Tracker nor WatchBMI shows ads.

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

BMI Calculator・Weight Tracker ships an update every 2 months, and WatchBMI daily. Most recently, BMI Calculator・Weight Tracker was updated on September 13, 2026 and WatchBMI on September 6, 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.*