# Keys Tester vs Marshal Stack

The clearest difference is update cadence: Keys Tester at every 5 days against Marshal Stack's every 3 weeks. Keys Tester also leads on iOS requirement (15.1 vs 17.0). 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.

Keys Tester ships an update every 5 days, Marshal Stack every 3 weeks. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Keys Tester | Marshal Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 32 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [PUNCAK NIAGA BERSAMA SDN. BHD.](https://appshunter.io/developer/1700860371) | [Alexandr Degteari](https://appshunter.io/developer/1597066966) |

## What reviewers say

### Keys Tester

[App page](https://appshunter.io/ios/app/keys-tester/id6759716603)

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

**In-app purchases:** none


### Marshal Stack

[App page](https://appshunter.io/ios/app/marshal-stack/id6801763798)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Keys Tester free?

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

### Is Marshal Stack free?

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

### Do Keys Tester or Marshal Stack have ads?

Neither Keys Tester nor Marshal Stack shows ads.

### Which is updated more often, Keys Tester or Marshal Stack?

Keys Tester ships an update every 5 days, and Marshal Stack every 3 weeks. Most recently, Keys Tester was updated on September 29, 2026 and Marshal Stack on October 3, 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.*