Immersion Reader vs リーダー
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Immersion Reader
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.
- One-tap word lookup in Japanese ebooks
- Import Yomichan and frequency dictionaries
- Export vocabulary to Anki
- Light and dark mode themes
- Lookup neighboring words
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Look up Japanese words as you read! Features - One tap to look up words in Japanese Ebooks. Tabs to help you look up neighboring words - Import Yomichan dictionaries and frequency dictionaries - Export saved vocabulary to Anki via Anki Dojo - Light mode, dark mode, and other themes for the dictionary
リーダー
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With リーダー, you can: - Create manga titles by linking your AniList account - Add your own manga volumes that have been OCR-processed using Mokuro - Import Yomitan-compatible dictionaries for instant word lookup - Tap on any text box while reading to see the full sentence with definitions and grammar explanation - Export words to your Anki deck - Customize the appearance of text boxes to suit your reading preferences リーダー is built to make reading native Japanese content more accessible and engaging for learners. Whether you're just starting out or already reading fluently, it's a helpful companion on your language journey.
Screenshots
Verdict
The clearest difference is rating: リーダー at 5.0 against Immersion Reader's 4.0. リーダー 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 ratings volume (26 vs 1). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Immersion Reader sells 1 one-off in-app purchase. リーダー asks for nothing beyond the download.
リーダー holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Immersion Reader has 26 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Immersion Reader's written reviews are positive against 100% of リーダー's.
Immersion Reader ships an update every 6 days, リーダー every 5 weeks. The most recent releases landed on October 1, 2026 and September 13, 2026 respectively.
| Parameter | Immersion Reader | リーダー |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (26 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 61.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 26 — better | 1 |
| Update frequency | Every 6 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 80 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Mathew Chan | REULP |
Customer experience
Immersion Reader
リーダー
In-app purchases
Immersion Reader
- Immersion Reader Premium$4.99
リーダー
No in-app purchases
