# Blue AI vs StudySojourn

The clearest difference is in-app purchases: StudySojourn at none against Blue AI's 2. StudySojourn also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Blue AI sells 2 in-app purchases, starting at $0.99 per 7 days. StudySojourn asks for nothing beyond the download.

Blue AI ships an update every 2 months, StudySojourn every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Blue AI | StudySojourn |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 173 MB | 63 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [InfinityBridgeLimited](https://appshunter.io/developer/1866466235) | [成 黄](https://appshunter.io/developer/6787037004) |

## What reviewers say

### Blue AI

[App page](https://appshunter.io/ios/app/blue-ai-fun-english-learning/id6775812213)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blue AI Unlimited – Weekly | $0.99 | per 7 days |
| Blue AI Unlimited – Annual | $9.99 | per year |


### StudySojourn

[App page](https://appshunter.io/ios/app/studysojourn/id6787097198)

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

**In-app purchases:** none


## Frequently asked questions

### Is Blue AI free?

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

### Is StudySojourn free?

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

### Do Blue AI or StudySojourn have ads?

Blue AI shows ads; StudySojourn does not.

### Which is updated more often, Blue AI or StudySojourn?

Blue AI ships an update every 2 months, and StudySojourn every 3 days. Most recently, Blue AI was updated on October 31, 2026 and StudySojourn on October 31, 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.*