Numbiro vs Immersion Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Numbiro
Practice recognizing spoken Japanese numbers to improve comprehension in everyday conversations. Choose number ranges from single digits to billions and practice Japanese counters. Compete against the clock to get as many correct as possible.
- Listen to spoken Japanese numbers
- Identify numbers by listening
- Select number ranges
- Practice Japanese counters
- Timed challenges
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Learning to say numbers is one thing. Understanding them in real conversation is another. With Numbiro, you listen to numbers spoken in one of 29 languages and identify what you hear. Practice anything from single digits to millions or even billions, and improve your speed and accuracy under pressure. Japanese learners can also practice counters, with 20 included in the free version. Challenge yourself to see how many answers you can get right in one minute. Supported languages include Arabic, Brazilian Portuguese, Cantonese, Catalan, Czech, Danish, Dutch, English, Finnish, French, German, Hindi, Icelandic, Italian, Japanese, Korean, Mandarin, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish and Welsh. Numbiro is ad-supported. Premium removes ads and unlocks additional features, including preset management and advanced Japanese counters, available with either a one-time purchase or subscription. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Screenshots
Verdict
The clearest difference is ads: Immersion Reader at none against Numbiro's shown. Immersion Reader also leads on update cadence (every 6 days vs every 3 months) and ratings volume (26 vs 7). Numbiro's advantage is rating (4.4 vs 4.0) and review sentiment (75% vs 62%). On price, in-app purchases, device support and iOS requirement 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. Numbiro sells 2 in-app purchases, starting at $0.49 per month and Immersion Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Numbiro holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 7 and 26 respectively. Written reviews point the same way: 75% of Numbiro's written reviews are positive against 62% of Immersion Reader's.
Numbiro ships an update every 3 months, Immersion Reader every 6 days. The most recent releases landed on August 22, 2026 and July 23, 2026 respectively.
| Parameter | Numbiro | Immersion Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) — better | 4.0 (26 ratings) |
| Positive reviews | 75.0% of reviews — better | 61.5% of reviews |
| Number of ratings | 7 | 26 — better |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 67 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Sulisoft Limited | Mathew Chan |
Customer experience
Numbiro
Immersion Reader
In-app purchases
Numbiro
- Premium Monthly$0.491 Month
- Premium Lifetime$3.99
Immersion Reader
- Immersion Reader Premium$4.99
Questions
Is Numbiro free?
Is Immersion Reader free?
Which has better reviews, Numbiro or Immersion Reader?
Do Numbiro or Immersion Reader have ads?
Which is updated more often, Numbiro or Immersion Reader?
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