# BMI Diary vs BMI Calculator・Weight Tracker

The clearest difference is rating: BMI Calculator・Weight Tracker at 4.8 against BMI Diary's 4.1. BMI Calculator・Weight Tracker also leads on ads (none vs shown) and ratings volume (517 vs 7). BMI Diary's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (12.0 vs 14.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. BMI Diary sells 1 one-off in-app purchase and BMI Calculator・Weight Tracker sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

BMI Calculator・Weight Tracker holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: BMI Calculator・Weight Tracker has 517 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 75% of BMI Diary's written reviews are positive against 84% of BMI Calculator・Weight Tracker's.

BMI Diary ships an update every 3 weeks, BMI Calculator・Weight Tracker every 2 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | BMI Diary | BMI Calculator・Weight Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/bmi-diary-bmi-calculator/id1521281509/reviews) | **[4.8 (517 ratings)](https://appshunter.io/ios/app/bmi-calculatorweight-tracker/id1560499972/reviews)** |
| Number of ratings | 7 | **517** |
| Positive reviews | 75.0% of reviews | **84.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 17 MB | 53 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) | [AboutMe Apps, Inc.](https://appshunter.io/developer/1088980079) |

## What reviewers say

### BMI Diary

[App page](https://appshunter.io/ios/app/bmi-diary-bmi-calculator/id1521281509)

Track your Body Mass Index (BMI) daily to manage weight and health effectively. Visualize your BMI trends in real-time to monitor progress. This tool is ideal for those focused on weight loss or bodybuilding.

**Highlights:** Daily BMI calculation, Save BMI values, Visualize BMI trends, Weight management, Health monitoring

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads forever | $0.99 | one-time |


### 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


## Frequently asked questions

### Is BMI Diary free?

BMI Diary is free to download, with in-app purchases available.

### Is BMI Calculator・Weight Tracker free?

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

### Which has better reviews, BMI Diary or BMI Calculator・Weight Tracker?

BMI Calculator・Weight Tracker is rated higher. BMI Diary averages 4.1 out of 5 from 7 ratings, while BMI Calculator・Weight Tracker averages 4.8 from 517 ratings.

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

BMI Diary shows ads; BMI Calculator・Weight Tracker does not.

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

BMI Diary ships an update every 3 weeks, and BMI Calculator・Weight Tracker every 2 months. Most recently, BMI Diary was updated on November 3, 2026 and BMI Calculator・Weight Tracker on November 7, 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.*