# KeyLinker vs 아차 충전 !

The clearest difference is rating: 아차 충전 ! at 5.0 against KeyLinker's 2.3. 아차 충전 ! also leads on update cadence (fortnightly vs every 2 months). KeyLinker's advantage is in-app purchases (none vs 3) and ratings volume (49 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 아차 충전 ! sells 3 in-app purchases, starting at $0.99 per 7 days. KeyLinker asks for nothing beyond the download.

아차 충전 ! holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: KeyLinker has 49 ratings behind it against 2, so its average is the more settled of the two.

KeyLinker ships an update every 2 months, 아차 충전 ! fortnightly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KeyLinker | 아차 충전 ! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (49 ratings)](https://appshunter.io/ios/app/keylinker/id1472490585/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id6450749898/reviews)** |
| Number of ratings | **49** | 2 |
| Positive reviews | 30.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 38 MB | 1 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ShenZhen ZhiXu Technology Co., Ltd](https://appshunter.io/developer/1472490584) | [Dongyeong Kang](https://appshunter.io/developer/1689765727) |

## 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


### 아차 충전 !

[App page](https://appshunter.io/ios/app/id6450749898)

Easily monitor your controller's battery level while gaming. Avoid interruptions due to low battery and enjoy a seamless gameplay experience. Offers both free and premium features for enhanced convenience.

**Highlights:** Check controller battery in-app, Receive battery notifications, Monitor while using other apps, Subscription options available, Automatic renewal

**Features:** Game Controller support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 아차 충전 ! 프리미엄 스탠다드 | $0.99 | per 7 days |
| 아차 충전 ! 프리미엄 스탠다드 | $2.99 | per month |
| 아차 충전 ! 프리미엄 스탠다드 | $29.99 | per year |


## Frequently asked questions

### Is KeyLinker free?

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

### Is 아차 충전 ! free?

아차 충전 ! is free to download, with in-app purchases available.

### Which has better reviews, KeyLinker or 아차 충전 !?

아차 충전 ! is rated higher. KeyLinker averages 2.3 out of 5 from 49 ratings, while 아차 충전 ! averages 5.0 from 2 ratings.

### Do KeyLinker or 아차 충전 ! have ads?

Neither KeyLinker nor 아차 충전 ! shows ads.

### Which is updated more often, KeyLinker or 아차 충전 !?

KeyLinker ships an update every 2 months, and 아차 충전 ! fortnightly. Most recently, KeyLinker was updated on October 7, 2026 and 아차 충전 ! on October 1, 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.*