# HayaiLearn vs Gravity

The clearest difference is rating: HayaiLearn at 4.5 against Gravity's 4.1. On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. HayaiLearn sells 8 in-app purchases, starting at $12.99 per month 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.

HayaiLearn holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 39 and 35 respectively. Written reviews complicate that: 60% of HayaiLearn's written reviews are positive against 68% of Gravity's, so the app with the better star average is not the one people write more warmly about.

HayaiLearn ships an update every 2 weeks, Gravity every 9 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | HayaiLearn | Gravity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (39 ratings)](https://appshunter.io/ios/app/hayailearn/id6743055074/reviews)** | [4.1 (35 ratings)](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394/reviews) |
| Number of ratings | **39** | 35 |
| Positive reviews | 60.0% of reviews | **67.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 112 MB | 109 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Fallen Cloud Studios LLC](https://appshunter.io/developer/1801046973) | [Heimdall Space Inc.](https://appshunter.io/developer/1896698357) |

## What reviewers say

### HayaiLearn

[App page](https://appshunter.io/ios/app/hayailearn/id6743055074)

This platform uses AI-powered video immersion to help you learn Japanese. It provides translations, explanations, and vocabulary breakdowns for YouTube videos, making learning fun and natural.

**Highlights:** AI subtitle translations and explanations, Interactive word meaning lookup, 10,000+ pre-processed YouTube videos, SRS video review and sentence mining, Shadowing for pronunciation practice, Word frequency lists and stats tracking

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $12.99 | per month |
| Pro Access | $12.99 | per month |
| Platinum | $24.99 | per month |
| Pro Access | $69.99 | per year |
| Pro Access | $99.99 | per year |
| Platinum | $129.99 | per year |
| Platinum | $184.99 | per year |
| Pro Access | $249.99 | one-time |


### 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 HayaiLearn free?

HayaiLearn 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, HayaiLearn or Gravity?

HayaiLearn is rated higher. HayaiLearn averages 4.5 out of 5 from 39 ratings, while Gravity averages 4.1 from 35 ratings.

### Do HayaiLearn or Gravity have ads?

Neither HayaiLearn nor Gravity shows ads.

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

HayaiLearn ships an update every 2 weeks, and Gravity every 9 days. Most recently, HayaiLearn was updated on October 25, 2026 and Gravity on October 25, 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.*