# RTM vs Luftkanalrechner

The clearest difference is update cadence: RTM at every 6 weeks against Luftkanalrechner's every 55 months. RTM also leads on iOS requirement (15.0 vs 17.0). 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.

RTM ships an update every 6 weeks, Luftkanalrechner every 55 months. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | RTM | Luftkanalrechner |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 55 months |
| Monetization | Free | — |
| Size | 26 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RTM Systems AG](https://appshunter.io/developer/1144056287) | [Martin Wulf](https://appshunter.io/developer/1524684514) |

## What reviewers say

### RTM

[App page](https://appshunter.io/ios/app/rtm/id1144056288)

Track personal time, performance, and orders with this mobile solution. It offers automatic or manual time entry, reporting on jobs, and absence logging. The app calculates balances like overtime and vacation, and supports offline data capture.

**Highlights:** Automatic/manual time entry, Order and project reporting, Absence logging, Barcode scanning, Balance calculation (overtime, vacation), Offline data capture, Multilingual support

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

**In-app purchases:** none


### Luftkanalrechner

[App page](https://appshunter.io/ios/app/luftkanalrechner/id1524684512)

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

**In-app purchases:** none


## Frequently asked questions

### Is RTM free?

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

### Is Luftkanalrechner free?

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

### Do RTM or Luftkanalrechner have ads?

Neither RTM nor Luftkanalrechner shows ads.

### Which is updated more often, RTM or Luftkanalrechner?

RTM ships an update every 6 weeks, and Luftkanalrechner every 55 months. Most recently, RTM was updated on October 18, 2026 and Luftkanalrechner on October 25, 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.*