# 集中読書 vs EchoNote

The clearest difference is device support: EchoNote at 4 against 集中読書's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 集中読書 sells 2 in-app purchases, starting at $1.99 per month and EchoNote sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

集中読書 ships an update every 2 weeks, EchoNote every 9 days. The most recent releases landed on October 27, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 集中読書 | EchoNote |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Size | 44 MB | 45 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [QOOQ inc.](https://appshunter.io/developer/446639722) | [koichi shimada](https://appshunter.io/developer/1895743581) |

## What reviewers say

### 集中読書

[App page](https://appshunter.io/ios/app/id6759477350)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間サブスクリプション | $1.99 | per month |
| 買い切り | $9.99 | one-time |


### EchoNote

[App page](https://appshunter.io/ios/app/echonote/id6764349230)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EchoNote Premium 月額 | $3.99 | per month |
| EchoNote Premium 年額 | $29.99 | per year |


## Frequently asked questions

### Is 集中読書 free?

集中読書 is free to download, with in-app purchases available.

### Is EchoNote free?

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

### Do 集中読書 or EchoNote have ads?

Neither 集中読書 nor EchoNote shows ads.

### Which is updated more often, 集中読書 or EchoNote?

集中読書 ships an update every 2 weeks, and EchoNote every 9 days. Most recently, 集中読書 was updated on October 27, 2026 and EchoNote on October 21, 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.*