KeyLinker vs GPchecker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeyLinker
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.
- Modify key parameters
- Customize lamplight settings
- Adjust vibration feedback
- Configure joystick and trigger
- Simultaneous device connection
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This app is used by handles that support keylinker protocol, which can be set to modify the parameters of more than ten functions of the handle, such as keys, lamplight, vibrations, joystick and trigger. Users can modify the parameters of the handle according to their habits. The flexible parameter settings greatly enhance the handle experience.The handle can be connected to this app and other equipment at the same time, and can be used at the same time
GPchecker
This utility app helps you test the functionality of game controllers connected to your iPhone. It allows you to verify the input values for sticks, triggers, and buttons, ensuring they are working correctly.
- Test gamepad sticks
- Test gamepad triggers
- Test gamepad buttons
- Check input values
- Verify controller function
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GPchecker is App to check the Stick, Trigger and Button function on Game Pad which connected to iPhone. When you worry about Stick and Trigger input, please check the input value using GPchecker. If Stick and Trigger input value reach 1.0 or -1.0, its function is OK.
Screenshots
Verdict
The clearest difference is review sentiment: GPchecker at 85% against KeyLinker's 30%. GPchecker also leads on rating (4.5 vs 2.3). KeyLinker's advantage is ads (none vs shown) and update cadence (every 2 months vs every 17 months). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GPchecker holds the better App Store score, 4.5 against 2.3. Both are backed by a comparable volume of ratings — 49 and 15 respectively. Written reviews point the same way: 30% of KeyLinker's written reviews are positive against 85% of GPchecker's.
KeyLinker ships an update every 2 months, GPchecker every 17 months. The most recent releases landed on October 7, 2026 and September 21, 2026 respectively.
| Parameter | KeyLinker | GPchecker |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (49 ratings) | 4.5 (15 ratings) — better |
| Positive reviews | 30.2% of reviews | 84.6% of reviews — better |
| Number of ratings | 49 — better | 15 |
| Update frequency | Every 2 months — better | Every 17 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 38 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | ShenZhen ZhiXu Technology Co., Ltd | Paraches Lifestyle Lab. |
Customer experience
KeyLinker
GPchecker
In-app purchases
KeyLinker
No in-app purchases
GPchecker
No in-app purchases
