# BMI Calculator by DevTechie vs Weight Diary

The clearest difference is ads: BMI Calculator by DevTechie at none against Weight Diary's shown. Weight Diary's advantage is iOS requirement (16.4 vs 26.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. BMI Calculator by DevTechie sells 3 in-app purchases, starting at $4.99 per 7 days and Weight Diary sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

BMI Calculator by DevTechie ships an update every 4 weeks, Weight Diary every 2 weeks. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | BMI Calculator by DevTechie | Weight Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/weight-diary-bmi-and-log/id6773232228/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 65 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Anoop tomar](https://appshunter.io/developer/1283062106) | [Sergei Korneev](https://appshunter.io/developer/1777598475) |

## What reviewers say

### BMI Calculator by DevTechie

[App page](https://appshunter.io/ios/app/bmi-calculator-by-devtechie/id6752465975)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BMI Weekly Access | $4.99 | per 7 days |
| BMI Monthly Access | $8.99 | per month |
| BMI Yearly Access | $24.99 | per year |


### Weight Diary

[App page](https://appshunter.io/ios/app/weight-diary-bmi-and-log/id6773232228)

Easily track your weight with a simple interface and visual progress charts. Gentle animal companions offer encouragement as you work towards your health goals. Optional premium features enhance the experience with more customization and data management.

**Highlights:** Log weight in seconds, Clear progress charts, Automatic BMI calculation, Gentle animal companions, Multiple profiles (Premium), Manual backup (Premium)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $1.99 | per month |
| Premium (yearly) | $9.99 | per year |
| Premium (lifetime) | $14.99 | one-time |


## Frequently asked questions

### Is BMI Calculator by DevTechie free?

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

### Is Weight Diary free?

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

### Do BMI Calculator by DevTechie or Weight Diary have ads?

Weight Diary shows ads; BMI Calculator by DevTechie does not.

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

BMI Calculator by DevTechie ships an update every 4 weeks, and Weight Diary every 2 weeks. Most recently, BMI Calculator by DevTechie was updated on September 17, 2026 and Weight Diary on September 10, 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.*