# BMI Calculator vs Interval Timer (Simple)

The clearest difference is ads: Interval Timer (Simple) at none against BMI Calculator's shown. Interval Timer (Simple) also leads on device support (3 vs 1) and iOS requirement (15.1 vs 26.2). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. BMI Calculator sells 3 in-app purchases, starting at $0.99 per month and Interval Timer (Simple) sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

BMI Calculator ships an update every 6 days, Interval Timer (Simple) weekly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | BMI Calculator | Interval Timer (Simple) |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Weekly |
| Size | 8 MB | 28 MB |
| Requires iOS | 26.2 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Pawel Malyszczuk](https://appshunter.io/developer/1795333871) | [Domett Xing](https://appshunter.io/developer/1876098022) |

## What reviewers say

### BMI Calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-weight-log/id6757407619)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $3.99 | per year |
| Premium Lifetime | $9.99 | one-time |


### Interval Timer (Simple)

[App page](https://appshunter.io/ios/app/interval-timer-simple/id6758968811)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $6.99 | one-time |


## Frequently asked questions

### Is BMI Calculator free?

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

### Is Interval Timer (Simple) free?

Interval Timer (Simple) is free to download, with in-app purchases available.

### Do BMI Calculator or Interval Timer (Simple) have ads?

BMI Calculator shows ads; Interval Timer (Simple) does not.

### Which is updated more often, BMI Calculator or Interval Timer (Simple)?

BMI Calculator ships an update every 6 days, and Interval Timer (Simple) weekly. Most recently, BMI Calculator was updated on October 2, 2026 and Interval Timer (Simple) on October 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.*