# Immersion Reader vs Yomu

The clearest difference is update cadence: Immersion Reader at every 6 days against Yomu's fortnightly. Immersion Reader also leads on iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Immersion Reader sells 1 one-off in-app purchase and Yomu sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Immersion Reader ships an update every 6 days, Yomu fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Immersion Reader | Yomu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (27 ratings)](https://appshunter.io/ios/app/immersion-reader/id6443721334/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 61.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 80 MB | 128 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mathew Chan](https://appshunter.io/developer/1441199099) | [Igor Kulman](https://appshunter.io/developer/1859561306) |

## What reviewers say

### Immersion Reader

[App page](https://appshunter.io/ios/app/immersion-reader/id6443721334)

Easily look up Japanese words while reading ebooks with a single tap. Import custom dictionaries and export saved vocabulary for spaced repetition learning. Offers customizable themes for a comfortable reading experience.

**Highlights:** One-tap word lookup in Japanese ebooks, Import Yomichan and frequency dictionaries, Export vocabulary to Anki, Light and dark mode themes, Lookup neighboring words

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Immersion Reader Premium | $4.99 | one-time |


### Yomu

[App page](https://appshunter.io/ios/app/yomu-japanese-reader/id6756255670)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | one-time |


## Frequently asked questions

### Is Immersion Reader free?

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

### Is Yomu free?

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

### Do Immersion Reader or Yomu have ads?

Neither Immersion Reader nor Yomu shows ads.

### Which is updated more often, Immersion Reader or Yomu?

Immersion Reader ships an update every 6 days, and Yomu fortnightly. Most recently, Immersion Reader was updated on October 24, 2026 and Yomu on October 24, 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.*