# 蓄積読書 vs READBASE (リードベース)

The clearest difference is ads: 蓄積読書 at none against READBASE (リードベース)'s shown. READBASE (リードベース)'s advantage is update cadence (every 3 days vs weekly) and iOS requirement (15.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 蓄積読書 sells 7 in-app purchases, starting at $2.99 per month and READBASE (リードベース) sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

蓄積読書 ships an update weekly, READBASE (リードベース) every 3 days. The most recent releases landed on October 4, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | 蓄積読書 | READBASE (リードベース) |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 52 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Yuki Yamagishi](https://appshunter.io/developer/1516430576) | [kaito kotaka](https://appshunter.io/developer/1848780372) |

## What reviewers say

### 蓄積読書

[App page](https://appshunter.io/ios/app/id1673784747)

This app helps adults build a reading habit by tracking progress, estimating completion times, and offering features to maintain reading streaks. It supports all book formats and allows for note-taking to capture insights.

**Highlights:** Real-time estimated reading completion time, Supports paper, e-books, and audiobooks, Streak maintenance with freeze items, Live Activity for lock screen progress, Note-taking for reading insights, Keyword search and barcode scanning for book registration

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 蓄積読書Plus＋ 月額プラン | $2.99 | per month |
| 蓄積読書Plus＋ 年額プラン | $22.99 | per year |
| 連続フリーズ | $0.29 | one-time |
| 連続フリーズ 2個 | $0.49 | one-time |
| 連続フリーズ 4個 | $0.99 | one-time |
| 連続フリーズ 3個 | $0.99 | one-time |
| 連続フリーズ 5個 | $1.99 | one-time |


### READBASE (リードベース)

[App page](https://appshunter.io/ios/app/readbase/id6754545629)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| gem3 | $0.99 | one-time |
| gem5 | $2.99 | one-time |
| gem30 | $6.99 | one-time |


## Frequently asked questions

### Is 蓄積読書 free?

蓄積読書 is free to download, with in-app purchases available.

### Is READBASE (リードベース) free?

READBASE (リードベース) is free to download, with in-app purchases available.

### Do 蓄積読書 or READBASE (リードベース) have ads?

READBASE (リードベース) shows ads; 蓄積読書 does not.

### Which is updated more often, 蓄積読書 or READBASE (リードベース)?

蓄積読書 ships an update weekly, and READBASE (リードベース) every 3 days. Most recently, 蓄積読書 was updated on October 4, 2026 and READBASE (リードベース) on September 29, 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.*