# BMI Diary vs BMI Calculator

The clearest difference is rating: BMI Calculator at 4.8 against BMI Diary's 4.1. BMI Calculator also leads on ratings volume (378 vs 7) and review sentiment (83% vs 75%). BMI Diary's advantage is update cadence (every 3 weeks vs every 13 months) and device support (4 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. BMI Diary sells 1 one-off in-app purchase and BMI Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

BMI Calculator holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: BMI Calculator has 378 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 83% of BMI Calculator's.

BMI Diary ships an update every 3 weeks, BMI Calculator every 13 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | BMI Diary | BMI Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (7 ratings)](https://appshunter.io/ios/app/bmi-diary-bmi-calculator/id1521281509/reviews) | **[4.8 (378 ratings)](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663/reviews)** |
| Number of ratings | 7 | **378** |
| Positive reviews | 75.0% of reviews | **83.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 13 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 37 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) | [Leap Health](https://appshunter.io/developer/1687598595) |

## 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

[App page](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663)

Calculate your Body Mass Index (BMI) using age, gender, height, and weight. Track your health progress, find your ideal weight, and receive tips for weight control. Supports metric and imperial units and syncs with Apple Health.

**Highlights:** Calculate BMI scientifically, Find ideal weight, Log BMI history, Track health progress, Sync data to Apple Health, Metric and imperial support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use and understand
- ✅ Accurate BMI calculation
- 📈 Helpful for tracking weight
- 😊 Improves self-esteem
- ✨ Pleasant visual design

**What reviewers complain about**

- 🤔 Discrepancy with doctor's advice
- ⚠️ Can cause insecurity about weight
- 📉 Graph scale not ideal for weight loss
- 🚫 Ads can be intrusive
- 🤷‍♀️ Some users disagree with weight categorization

**Reported bugs**

- App crashes when entering decimal weight
- App crashes when entering second day's weight
- App crashes when pressing the 'day' button
- App crashes on second day's input

**Requested features**

- Add messages and tips for different weight categories (underweight, overweight, obese)
- Implement dark mode
- Allow data storage for multiple users
- Adjust graph scale for better visibility of weight loss
- Allow input of decimal numbers for weight


## Frequently asked questions

### Is BMI Diary free?

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

### Is BMI Calculator free?

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

### Which has better reviews, BMI Diary or BMI Calculator?

BMI Calculator is rated higher. BMI Diary averages 4.1 out of 5 from 7 ratings, while BMI Calculator averages 4.8 from 378 ratings.

### Do BMI Diary or BMI Calculator have ads?

Both BMI Diary and BMI Calculator show ads.

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

BMI Diary ships an update every 3 weeks, and BMI Calculator every 13 months. Most recently, BMI Diary was updated on November 3, 2026 and BMI Calculator on November 3, 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.*