# Gravity vs Nihongo Rush

The clearest difference is rating: Gravity at 4.1 against Nihongo Rush's 3.4. Gravity also leads on ads (none vs shown) and review sentiment (68% vs 50%). Nihongo Rush's advantage is update cadence (every 4 days vs every 9 days). On price, in-app purchases, monetization model 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 and Nihongo Rush sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Gravity holds the better App Store score, 4.1 against 3.4. That said, the two scores are not equally well evidenced: Gravity has 35 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 68% of Gravity's written reviews are positive against 50% of Nihongo Rush's.

Gravity ships an update every 9 days, Nihongo Rush every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Gravity | Nihongo Rush |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (35 ratings)](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394/reviews)** | [3.4 (5 ratings)](https://appshunter.io/ios/app/nihongo-rush-learn-japanese/id6811640536/reviews) |
| Number of ratings | **35** | 5 |
| Positive reviews | **67.9% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 109 MB | 255 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Heimdall Space Inc.](https://appshunter.io/developer/1896698357) | [Egemen Denizeri](https://appshunter.io/developer/6803117892) |

## What reviewers say

### 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 |


### Nihongo Rush

[App page](https://appshunter.io/ios/app/nihongo-rush-learn-japanese/id6811640536)

Learn Japanese vocabulary and grammar through an engaging arcade-style game. Progress through various districts, master words with spaced repetition, and improve listening skills with spoken audio. Daily challenges and achievements encourage consistent practice.

**Highlights:** Arcade-style learning gameplay, Spaced repetition for vocabulary retention, Listening comprehension exercises, JLPT N5 and N4 level content, Daily quests and achievements, Spoken Japanese words and sentences

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is Gravity free?

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

### Is Nihongo Rush free?

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

### Which has better reviews, Gravity or Nihongo Rush?

Gravity is rated higher. Gravity averages 4.1 out of 5 from 35 ratings, while Nihongo Rush averages 3.4 from 5 ratings.

### Do Gravity or Nihongo Rush have ads?

Nihongo Rush shows ads; Gravity does not.

### Which is updated more often, Gravity or Nihongo Rush?

Gravity ships an update every 9 days, and Nihongo Rush every 4 days. Most recently, Gravity was updated on October 25, 2026 and Nihongo Rush on October 24, 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.*