# Numbiro vs Immersion Reader

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.

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.

## The numbers

| Metric | Numbiro | Immersion Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/numbiro/id1610373472/reviews)** | [4.0 (26 ratings)](https://appshunter.io/ios/app/immersion-reader/id6443721334/reviews) |
| Number of ratings | 7 | **26** |
| Positive reviews | **75.0% of reviews** | 61.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 67 MB | 80 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sulisoft Limited](https://appshunter.io/developer/1610373474) | [Mathew Chan](https://appshunter.io/developer/1441199099) |

## What reviewers say

### Numbiro

[App page](https://appshunter.io/ios/app/numbiro/id1610373472)

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.

**Highlights:** Listen to spoken Japanese numbers, Identify numbers by listening, Select number ranges, Practice Japanese counters, Timed challenges

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.49 | per month |
| Premium Lifetime | $3.99 | one-time |


### 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 |


## Frequently asked questions

### Is Numbiro free?

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

### Is Immersion Reader free?

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

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

Numbiro is rated higher. Numbiro averages 4.4 out of 5 from 7 ratings, while Immersion Reader averages 4.0 from 26 ratings.

### Do Numbiro or Immersion Reader have ads?

Numbiro shows ads; Immersion Reader does not.

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

Numbiro ships an update every 3 months, and Immersion Reader every 6 days. Most recently, Numbiro was updated on August 22, 2026 and Immersion Reader on July 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.*