# KeyLinker vs Controller Diagnostics

The clearest difference is iOS requirement: KeyLinker at 13.0 against Controller Diagnostics's 16.0. 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.

KeyLinker ships an update every 2 months, Controller Diagnostics every 5 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | KeyLinker | Controller Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (52 ratings)](https://appshunter.io/ios/app/keylinker/id1472490585/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 30.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 38 MB | 2 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ShenZhen ZhiXu Technology Co., Ltd](https://appshunter.io/developer/1472490584) | [Lykketronic AS](https://appshunter.io/developer/1297619408) |

## What reviewers say

### KeyLinker

[App page](https://appshunter.io/ios/app/keylinker/id1472490585)

Customize and enhance your controller experience with this utility app. Modify parameters for keys, lighting, vibration, and more to suit your personal preferences. Enjoy a more personalized and responsive gaming setup.

**Highlights:** Modify key parameters, Customize lamplight settings, Adjust vibration feedback, Configure joystick and trigger, Simultaneous device connection

**Features:** Vision Pro support

**In-app purchases:** none


### Controller Diagnostics

[App page](https://appshunter.io/ios/app/controller-diagnostics/id6444090201)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KeyLinker free?

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

### Is Controller Diagnostics free?

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

### Do KeyLinker or Controller Diagnostics have ads?

Neither KeyLinker nor Controller Diagnostics shows ads.

### Which is updated more often, KeyLinker or Controller Diagnostics?

KeyLinker ships an update every 2 months, and Controller Diagnostics every 5 weeks. Most recently, KeyLinker was updated on October 26, 2026 and Controller Diagnostics on October 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.*