# TEMS™ OnDevice vs TestK

The clearest difference is update cadence: TestK at every 2 months against TEMS™ OnDevice's every 6 months. TestK also leads on iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

TEMS™ OnDevice ships an update every 6 months, TestK every 2 months. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TEMS™ OnDevice | TestK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 9 MB | 18 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [InfoVista](https://appshunter.io/developer/417612552) | [Maine Avenue Technologies SL](https://appshunter.io/developer/391487306) |

## What reviewers say

### TEMS™ OnDevice

[App page](https://appshunter.io/ios/app/tems-ondevice/id1548649639)

**Features:** macOS Compatibility

**In-app purchases:** none


### TestK

[App page](https://appshunter.io/ios/app/testk-test-devices/id1583270148)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TEMS™ OnDevice free?

TEMS™ OnDevice is free to download, with no in-app purchases.

### Is TestK free?

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

### Do TEMS™ OnDevice or TestK have ads?

Neither TEMS™ OnDevice nor TestK shows ads.

### Which is updated more often, TEMS™ OnDevice or TestK?

TEMS™ OnDevice ships an update every 6 months, and TestK every 2 months. Most recently, TEMS™ OnDevice was updated on October 6, 2026 and TestK on October 25, 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.*