# Immersion Reader vs MaruMori

The clearest difference is rating: MaruMori at 5.0 against Immersion Reader's 4.0. MaruMori also leads on review sentiment (100% vs 62%) and in-app purchases (none vs 1). Immersion Reader's advantage is update cadence (every 6 days vs every 5 weeks) and iOS requirement (13.0 vs 15.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Immersion Reader sells 1 one-off in-app purchase. MaruMori asks for nothing beyond the download.

MaruMori holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 27 and 11 respectively. Written reviews point the same way: 62% of Immersion Reader's written reviews are positive against 100% of MaruMori's.

Immersion Reader ships an update every 6 days, MaruMori every 5 weeks. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Immersion Reader | MaruMori |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (27 ratings)](https://appshunter.io/ios/app/immersion-reader/id6443721334/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/marumori/id6642702724/reviews)** |
| Number of ratings | **27** | 11 |
| Positive reviews | 61.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 80 MB | 134 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mathew Chan](https://appshunter.io/developer/1441199099) | [Lucien Bos](https://appshunter.io/developer/1572710967) |

## 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 |


### MaruMori

[App page](https://appshunter.io/ios/app/marumori/id6642702724)

Embark on a Japanese learning adventure with comprehensive grammar lessons, reading exercises, and minigames. Master kanji and vocabulary through spaced repetition and custom study lists, all crafted by human experts.

**Highlights:** In-depth grammar lessons (N5-N1), Engaging reading exercises, Minigames for learning, Spaced Repetition System (SRS) for kanji/vocabulary, 2000 kanji and 8000 vocabulary, Custom study lists, Human-created content

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Immersion Reader free?

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

### Is MaruMori free?

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

### Which has better reviews, Immersion Reader or MaruMori?

MaruMori is rated higher. Immersion Reader averages 4.0 out of 5 from 27 ratings, while MaruMori averages 5.0 from 11 ratings.

### Do Immersion Reader or MaruMori have ads?

Neither Immersion Reader nor MaruMori shows ads.

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

Immersion Reader ships an update every 6 days, and MaruMori every 5 weeks. Most recently, Immersion Reader was updated on October 24, 2026 and MaruMori on October 23, 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.*