# 読書カレンダー vs Cocoas

The clearest difference is in-app purchases: Cocoas at none against 読書カレンダー's 4. Cocoas also leads on iOS requirement (15.1 vs 17.0). 読書カレンダー's advantage is update cadence (every 8 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. 読書カレンダー sells 4 in-app purchases, starting at $2.99 per month. Cocoas asks for nothing beyond the download.

読書カレンダー ships an update every 8 days, Cocoas every 3 weeks. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 読書カレンダー | Cocoas |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 56 MB | 38 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Manabu TsuTsui](https://appshunter.io/developer/1745681573) | [KOJI ASAMIZU](https://appshunter.io/developer/1821761089) |

## What reviewers say

### 読書カレンダー

[App page](https://appshunter.io/ios/app/id6746183055)

This app helps book lovers beautifully record and manage their reading history using a calendar view. Easily register books via barcode scan or title search, and organize your digital bookshelf. Premium features offer advanced reading progress visualization and goal tracking.

**Highlights:** Calendar-style reading log, Visual book history on calendar, Barcode book registration, Digital bookshelf management, Reading progress visualization, Reading goal setting

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額サブスクリプション | $2.99 | per month |
| 年割サブスクリプション | $22.99 | per year |
| 買い切りプラン(24時間限定) | $14.99 | one-time |
| 買い切りプラン | $29.99 | one-time |


### Cocoas

[App page](https://appshunter.io/ios/app/cocoas/id6747536759)

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

**In-app purchases:** none


## Frequently asked questions

### Is 読書カレンダー free?

読書カレンダー is free to download, with in-app purchases available.

### Is Cocoas free?

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

### Do 読書カレンダー or Cocoas have ads?

Neither 読書カレンダー nor Cocoas shows ads.

### Which is updated more often, 読書カレンダー or Cocoas?

読書カレンダー ships an update every 8 days, and Cocoas every 3 weeks. Most recently, 読書カレンダー was updated on October 16, 2026 and Cocoas on October 3, 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.*