# I vs BPM Calc

The clearest difference is iOS requirement: I at 8.0 against BPM Calc's 15.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

I ships an update every 4 months, BPM Calc every 5 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | I | BPM Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Size | 11 MB | 2 MB |
| Requires iOS | **8.0** | 15.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Spetrotec LTD](https://appshunter.io/developer/660726738) | [Bev Fremin](https://appshunter.io/developer/1575107004) |

## What reviewers say

### I

[App page](https://appshunter.io/ios/app/i-watcher/id660726735)

**Features:** macOS Compatibility

**In-app purchases:** none


### BPM Calc

[App page](https://appshunter.io/ios/app/bpm-calc/id1629516593)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is I free?

I is free to download, with no in-app purchases.

### Is BPM Calc free?

BPM Calc is free to download, with no in-app purchases.

### Do I or BPM Calc have ads?

Neither I nor BPM Calc shows ads.

### Which is updated more often, I or BPM Calc?

I ships an update every 4 months, and BPM Calc every 5 months. Most recently, I was updated on October 6, 2026 and BPM Calc on September 27, 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.*