# Fixu vs Gravity

The clearest difference is rating: Fixu at 5.0 against Gravity's 4.2. Fixu also leads on review sentiment (100% vs 71%). Gravity's advantage is ratings volume (46 vs 2) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Fixu sells 3 in-app purchases, starting at $1.99 per 7 days and Gravity sells 6 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Fixu holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Gravity has 46 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Fixu's written reviews are positive against 71% of Gravity's.

Fixu ships an update every 4 days, Gravity weekly. The most recent releases landed on November 9, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Fixu | Gravity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/fixu-japanese-keyboard/id6763669208/reviews)** | [4.2 (46 ratings)](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394/reviews) |
| Number of ratings | 2 | **46** |
| Positive reviews | **100.0% of reviews** | 70.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Freemium | Free with in-app purchases |
| Size | 143 MB | 112 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Justin Fernando](https://appshunter.io/developer/1895428650) | [Heimdall Space Inc.](https://appshunter.io/developer/1896698357) |

## What reviewers say

### Fixu

[App page](https://appshunter.io/ios/app/fixu-japanese-keyboard/id6763669208)

This app provides real-time grammar and tone feedback for Japanese text, helping users learn and improve their writing. It also offers tools to study received messages and create personalized flashcards from conversations.

**Highlights:** Real-time grammar and tone feedback, Explanations for corrections, Study received messages with breakdowns, Personalized flashcards from conversations, Progress tracking dashboard, Works in all apps

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fixu Premium | $1.99 | per 7 days |
| Fixu Premium | $4.99 | per month |
| Fixu Premium | $35.99 | per year |


### Gravity

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

Learn Japanese and Mandarin Chinese through authentic videos and music. This immersion-first app uses real content, word-synced transcripts, and interactive flashcards to build practical language skills. Enjoy personalized learning tailored to your interests, from anime to C-dramas.

**Highlights:** Learn through native videos and music, Word-synced transcripts with translations, Interactive flashcards with spaced repetition, Karaoke Mode for song-based learning, Personalized learning feed, Supports Japanese and Mandarin Chinese

**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 Fixu free?

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

### Is Gravity free?

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

### Which has better reviews, Fixu or Gravity?

Fixu is rated higher. Fixu averages 5.0 out of 5 from 2 ratings, while Gravity averages 4.2 from 46 ratings.

### Do Fixu or Gravity have ads?

Neither Fixu nor Gravity shows ads.

### Which is updated more often, Fixu or Gravity?

Fixu ships an update every 4 days, and Gravity weekly. Most recently, Fixu was updated on November 9, 2026 and Gravity on November 11, 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.*