# REISSER vs SCHELL

The clearest difference is update cadence: SCHELL at every 2 weeks against REISSER's every 3 months. REISSER's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

REISSER ships an update every 3 months, SCHELL every 2 weeks. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | REISSER | SCHELL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 20 MB | 183 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SCT Schiele GmbH](https://appshunter.io/developer/483354490) | [SCHELL Armaturentechnologe GmbH & Co KG](https://appshunter.io/developer/1151157542) |

## What reviewers say

### REISSER

[App page](https://appshunter.io/ios/app/reisser/id536570435)

**Features:** macOS Compatibility

**In-app purchases:** none


### SCHELL

[App page](https://appshunter.io/ios/app/schell/id6444608310)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is REISSER free?

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

### Is SCHELL free?

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

### Do REISSER or SCHELL have ads?

Neither REISSER nor SCHELL shows ads.

### Which is updated more often, REISSER or SCHELL?

REISSER ships an update every 3 months, and SCHELL every 2 weeks. Most recently, REISSER was updated on September 10, 2026 and SCHELL on September 18, 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.*