# Satori Reader vs JP Number：数字

The clearest difference is in-app purchases: JP Number：数字 at none against Satori Reader's 8. JP Number：数字 also leads on iOS requirement (8.0 vs 15.0). Satori Reader's advantage is ads (none vs shown) and update cadence (every 3 months vs every 19 months). On price and device support there is nothing between them.

Both are free to download. Satori Reader sells 3 in-app purchases, starting at $8.99 per month. JP Number：数字 asks for nothing beyond the download.

Satori Reader ships an update every 3 months, JP Number：数字 every 19 months. The most recent releases landed on September 29, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Satori Reader | JP Number：数字 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (215 ratings)](https://appshunter.io/ios/app/satori-reader/id1382950847/reviews)** | — |
| Number of ratings | **215** | — |
| Positive reviews | 90.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 123 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Brak Software, Inc.](https://appshunter.io/developer/304088759) | [Hajime Sasaki](https://appshunter.io/developer/1495619502) |

## What reviewers say

### Satori Reader

[App page](https://appshunter.io/ios/app/satori-reader/id1382950847)

Enhance your Japanese reading and listening skills with engaging stories written by native speakers. Features adaptive kanji, smart definitions, and spaced repetition to build vocabulary. Get clarity with friendly annotations and human feedback.

**Highlights:** Compelling stories by native speakers, Audio narration by voice actors, Adaptive kanji presentation, Smart word definitions, Friendly annotations, Spaced repetition vocabulary review, Human feedback and support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Satori Reader Monthly | $8.99 | per month |
| Satori Reader Annual | $89.99 | per year |
| Satori Reader Annual | $89.99 | per year |

**What reviewers like**

- 🚀 Excellent for improving reading and listening skills
- 👍 Detailed grammar and vocabulary explanations
- 🎨 Customizable display settings for kanji/furigana
- 💡 Integrated spaced repetition flashcard system
- 🎧 High-quality voice acting and audio

**What reviewers complain about**

- 🐛 Occasional app crashes or sync issues
- 🕰️ Lack of speed control for audio playback
- 💰 Subscription-based model can be expensive
- 🔍 Limited search/navigation functionality

**Reported bugs**

- Login issues and account creation problems
- Syncing and loading delays on some devices

**Requested features**

- Dark mode option
- Ability to loop audio playback
- Kanji lookup/learning tools integration
- More advanced/diverse content selection


### JP Number：数字

[App page](https://appshunter.io/ios/app/jp-number/id1495619503)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Satori Reader free?

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

### Is JP Number：数字 free?

JP Number：数字 is free to download, with no in-app purchases.

### Do Satori Reader or JP Number：数字 have ads?

JP Number：数字 shows ads; Satori Reader does not.

### Which is updated more often, Satori Reader or JP Number：数字?

Satori Reader ships an update every 3 months, and JP Number：数字 every 19 months. Most recently, Satori Reader was updated on September 29, 2026 and JP Number：数字 on September 20, 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.*