# Kachi vs Rotaro

The clearest difference is in-app purchases: Kachi at none against Rotaro's 1. Kachi also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.0). Rotaro's advantage is update cadence (every 2 days vs monthly). On price and device support there is nothing between them.

Both are free to download. Rotaro sells 1 one-off in-app purchase. Kachi asks for nothing beyond the download.

Kachi ships an update monthly, Rotaro every 2 days. The most recent releases landed on October 30, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Kachi | Rotaro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 days** |
| Size | 39 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Ottek Harmony, S.A](https://appshunter.io/developer/1856661255) | [Martin Polacek](https://appshunter.io/developer/1447958461) |

## What reviewers say

### Kachi

[App page](https://appshunter.io/ios/app/kachi/id6755839188)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rotaro

[App page](https://appshunter.io/ios/app/rotaro-shift-work-calendar/id6806749128)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rotaro Pro | $4.99 | one-time |


## Frequently asked questions

### Is Kachi free?

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

### Is Rotaro free?

Rotaro is free to download, with in-app purchases available.

### Do Kachi or Rotaro have ads?

Rotaro shows ads; Kachi does not.

### Which is updated more often, Kachi or Rotaro?

Kachi ships an update monthly, and Rotaro every 2 days. Most recently, Kachi was updated on October 30, 2026 and Rotaro 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.*