# AC20 vs Schlüter®

The clearest difference is update cadence: Schlüter® at every 2 weeks against AC20's every 21 months. AC20's advantage is iOS requirement (12.0 vs 16.0). 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.

AC20 ships an update every 21 months, Schlüter® every 2 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | AC20 | Schlüter® |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 weeks** |
| Size | 45 MB | 106 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Daikin Electronic Devices Malaysia Sdn Bhd](https://appshunter.io/developer/1558022132) | [Schlueter-Systems KG](https://appshunter.io/developer/915757337) |

## What reviewers say

### AC20

[App page](https://appshunter.io/ios/app/ac20/id1604080534)

**Features:** macOS Compatibility

**In-app purchases:** none


### Schlüter®

[App page](https://appshunter.io/ios/app/schluter-tr-control/id6749083068)

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

**In-app purchases:** none


## Frequently asked questions

### Is AC20 free?

AC20 is free to download, with no in-app purchases.

### Is Schlüter® free?

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

### Do AC20 or Schlüter® have ads?

Neither AC20 nor Schlüter® shows ads.

### Which is updated more often, AC20 or Schlüter®?

AC20 ships an update every 21 months, and Schlüter® every 2 weeks. Most recently, AC20 was updated on November 7, 2026 and Schlüter® on November 5, 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.*