# 読書カレンダー vs Reading Memory

The clearest difference is review sentiment: Reading Memory at 100% against 読書カレンダー's 67%. 読書カレンダー's advantage is update cadence (every 10 days vs every 2 months) and iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 読書カレンダー sells 4 in-app purchases, starting at $1.99 per month and Reading Memory sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

読書カレンダー ships an update every 10 days, Reading Memory every 2 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 読書カレンダー | Reading Memory |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | Freemium | Freemium |
| Size | 54 MB | 48 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Manabu TsuTsui](https://appshunter.io/developer/1745681573) | [Kyoichi Taniguchi](https://appshunter.io/developer/1609440791) |

## What reviewers say

### 読書カレンダー

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

Visually track your reading habits with a calendar-style log. Easily register books by scanning barcodes or searching by title. Organize your read books on a digital bookshelf and analyze your progress with premium features.

**Highlights:** Calendar-style reading log, Book cover display on calendar, Barcode book registration, Searchable digital bookshelf, Reading status categorization, Reading progress visualization (premium)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額サブスクリプション | $1.99 | 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 |


### Reading Memory

[App page](https://appshunter.io/ios/app/reading-memory-book-tracker/id6751159926)

This app helps you build a consistent reading habit and retain information from the books you read. It allows you to track reading days, manage your to-read pile, and take private notes on your books. Advanced features like AI-powered key point extraction are available through an optional subscription.

**Highlights:** Build daily reading habits, Track reading streaks and finished books, Organize to-read and finished book piles, Take private notes and sticky notes, Search and add books via barcode or title, Generate reading cards and badges, AI-powered key point extraction (subscription)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| メモリープラス月額プラン | $3.99 | per month |
| メモリープラス年額プラン | $39.99 | per year |


## 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 Reading Memory free?

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

### Do 読書カレンダー or Reading Memory have ads?

Neither 読書カレンダー nor Reading Memory shows ads.

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

読書カレンダー ships an update every 10 days, and Reading Memory every 2 months. Most recently, 読書カレンダー was updated on November 6, 2026 and Reading Memory on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*