# iCorrTool vs LeuTek Alarm

The clearest difference is update cadence: iCorrTool at every 3 months against LeuTek Alarm's every 7 months. iCorrTool also leads on iOS requirement (13 vs 15.6). 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.

iCorrTool ships an update every 3 months, LeuTek Alarm every 7 months. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | iCorrTool | LeuTek Alarm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Size | 48 MB | 28 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Steffel KKS GmbH](https://appshunter.io/developer/786166712) | [USU GmbH](https://appshunter.io/developer/1813862166) |

## What reviewers say

### iCorrTool

[App page](https://appshunter.io/ios/app/icorrtool/id786166709)

**Features:** macOS Compatibility

**In-app purchases:** none


### LeuTek Alarm

[App page](https://appshunter.io/ios/app/leutek-alarm/id1435897251)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iCorrTool free?

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

### Is LeuTek Alarm free?

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

### Do iCorrTool or LeuTek Alarm have ads?

Neither iCorrTool nor LeuTek Alarm shows ads.

### Which is updated more often, iCorrTool or LeuTek Alarm?

iCorrTool ships an update every 3 months, and LeuTek Alarm every 7 months. Most recently, iCorrTool was updated on October 29, 2026 and LeuTek Alarm on October 26, 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.*