# Japanese Numbers Trainer vs Gravity

The clearest difference is in-app purchases: Japanese Numbers Trainer at none against Gravity's 6. Gravity's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Gravity sells 6 in-app purchases, starting at $4.99 per month. Japanese Numbers Trainer asks for nothing beyond the download.

## The numbers

| Metric | Japanese Numbers Trainer | Gravity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (39 ratings)](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 69.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 109 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IAN PATRICK MAHONEY](https://appshunter.io/developer/1871647044) | [Heimdall Space Inc.](https://appshunter.io/developer/1896698357) |

## What reviewers say

### Japanese Numbers Trainer

[App page](https://appshunter.io/ios/app/japanese-numbers-trainer/id6760585902)

**In-app purchases:** none


### Gravity

[App page](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394)

Learn Japanese by capturing real-world text from your surroundings. This app creates personalized flashcards and study plans based on the vocabulary you encounter daily, making learning practical and context-driven.

**Highlights:** Personalized learning plans, Instant vocabulary extraction from photos, Smart review system, Context-based flashcards, Immersion-focused learning, Daily learning sessions

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| special offer | $4.99 | per month |
| Fluency | $6.99 | per 7 days |
| Immersive Monthly | $8.99 | per month |
| Immersive Monthly | $11.99 | per month |
| Immersion | $14.99 | per month |
| Polyglot | $69.99 | per year |


## Frequently asked questions

### Is Japanese Numbers Trainer free?

Japanese Numbers Trainer is free to download, with no in-app purchases.

### Is Gravity free?

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

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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.*