# PROZENTBUCH vs Kai Sushi

The clearest difference is ads: PROZENTBUCH at none against Kai Sushi's shown. PROZENTBUCH also leads on update cadence (every 6 months vs every 76 months). Kai Sushi's advantage is iOS requirement (11.0 vs 15.0). On price, 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.

PROZENTBUCH ships an update every 6 months, Kai Sushi every 76 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | PROZENTBUCH | Kai Sushi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 months** | Every 76 months |
| Size | 17 MB | 30 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [pro100 network schweiz ag](https://appshunter.io/developer/453754989) | [Kai Sushi](https://appshunter.io/developer/1412450591) |

## What reviewers say

### PROZENTBUCH

[App page](https://appshunter.io/ios/app/prozentbuch/id459690263)

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

**In-app purchases:** none


### Kai Sushi

[App page](https://appshunter.io/ios/app/kai-sushi/id1412450592)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PROZENTBUCH free?

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

### Is Kai Sushi free?

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

### Do PROZENTBUCH or Kai Sushi have ads?

Kai Sushi shows ads; PROZENTBUCH does not.

### Which is updated more often, PROZENTBUCH or Kai Sushi?

PROZENTBUCH ships an update every 6 months, and Kai Sushi every 76 months. Most recently, PROZENTBUCH was updated on October 9, 2026 and Kai Sushi on October 7, 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.*