# iokey vs MiniProf Criterion

The clearest difference is iOS requirement: iokey at 15.0 against MiniProf Criterion's 17.0. 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.

iokey ships an update every 4 months, MiniProf Criterion every 3 months. The most recent releases landed on September 24, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | iokey | MiniProf Criterion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 14 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dambee Technology Co., Ltd.](https://appshunter.io/developer/1470217773) | [Greenwood Engineering AS](https://appshunter.io/developer/1622549002) |

## What reviewers say

### iokey

[App page](https://appshunter.io/ios/app/iokey/id1502213625)

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

**In-app purchases:** none


### MiniProf Criterion

[App page](https://appshunter.io/ios/app/miniprof-criterion/id1622549000)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iokey free?

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

### Is MiniProf Criterion free?

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

### Do iokey or MiniProf Criterion have ads?

Neither iokey nor MiniProf Criterion shows ads.

### Which is updated more often, iokey or MiniProf Criterion?

iokey ships an update every 4 months, and MiniProf Criterion every 3 months. Most recently, iokey was updated on September 24, 2026 and MiniProf Criterion on September 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.*