# うにタン vs WithStudy

The clearest difference is in-app purchases: うにタン at none against WithStudy's 2. WithStudy's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. WithStudy sells 2 in-app purchases, starting at $4.99 per month. うにタン asks for nothing beyond the download.

うにタン ships an update every 2 weeks, WithStudy every 10 days. The most recent releases landed on September 28, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | うにタン | WithStudy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Size | 40 MB | 39 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [kohei yamashita](https://appshunter.io/developer/1864630137) | [Yoshihiro Shiozaki](https://appshunter.io/developer/1885735636) |

## What reviewers say

### うにタン

[App page](https://appshunter.io/ios/app/id6757112583)

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

**In-app purchases:** none


### WithStudy

[App page](https://appshunter.io/ios/app/withstudy/id6760686329)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WithStudy Premium (Monthly) | $4.99 | per month |
| WithStudy Premium (Annual) | $39.99 | per year |


## Frequently asked questions

### Is うにタン free?

うにタン is free to download, with no in-app purchases.

### Is WithStudy free?

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

### Do うにタン or WithStudy have ads?

うにタン shows ads; WithStudy does not.

### Which is updated more often, うにタン or WithStudy?

うにタン ships an update every 2 weeks, and WithStudy every 10 days. Most recently, うにタン was updated on September 28, 2026 and WithStudy on September 16, 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.*