# OeDA vs MathArena Junior

The clearest difference is in-app purchases: OeDA at none against MathArena Junior's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MathArena Junior sells 3 in-app purchases, starting at $6.99 per month. OeDA asks for nothing beyond the download.

OeDA ships an update every 9 days, MathArena Junior every 2 weeks. The most recent releases landed on October 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | OeDA | MathArena Junior |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 16 MB | 111 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [iBros.ch GmbH](https://appshunter.io/developer/418187516) | [MatheArena GmbH](https://appshunter.io/developer/1424250411) |

## What reviewers say

### OeDA

[App page](https://appshunter.io/ios/app/oeda/id1659504170)

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

**In-app purchases:** none


### MathArena Junior

[App page](https://appshunter.io/ios/app/matharena-junior/id6443734276)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathArena Monthly Subscription | $6.99 | per month |
| MathArena Annual Subscription | $22.99 | per year |
| MatheArena Junior One Time | $69.99 | one-time |


## Frequently asked questions

### Is OeDA free?

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

### Is MathArena Junior free?

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

### Do OeDA or MathArena Junior have ads?

Neither OeDA nor MathArena Junior shows ads.

### Which is updated more often, OeDA or MathArena Junior?

OeDA ships an update every 9 days, and MathArena Junior every 2 weeks. Most recently, OeDA was updated on October 30, 2026 and MathArena Junior on September 29, 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.*