# Gravity vs DSB1

The clearest difference is in-app purchases: DSB1 at none against Gravity's 6. On price, ads, device support 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. DSB1 asks for nothing beyond the download.

## The numbers

| Metric | Gravity | DSB1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (39 ratings)](https://appshunter.io/ios/app/gravity-language-immersion/id6769900394/reviews)** | — |
| Number of ratings | **39** | — |
| Positive reviews | 67.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 109 MB | 111 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heimdall Space Inc.](https://appshunter.io/developer/1896698357) | [Concept Interactive Inc.](https://appshunter.io/developer/1437684225) |

## 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 |


### DSB1

[App page](https://appshunter.io/ios/app/dsb1/id6779069476)

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

**In-app purchases:** none


## Frequently asked questions

### Is Gravity free?

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

### Is DSB1 free?

DSB1 is free to download, with no in-app purchases.

### Do Gravity or DSB1 have ads?

Neither Gravity nor DSB1 shows ads.

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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.*