# The Dojo vs Oyster | Middle School Math

The clearest difference is update cadence: Oyster | Middle School Math at every 10 days against The Dojo's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. The Dojo sells 2 in-app purchases, starting at $11.99 per month and Oyster | Middle School Math sells 2 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

The Dojo ships an update every 3 weeks, Oyster | Middle School Math every 10 days. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | The Dojo | Oyster | Middle School Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 4 MB | 70 MB |
| Requires iOS | **17.0** | 17.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomas Alves Pereira](https://appshunter.io/developer/6792901903) | [Bulvar.co Limited](https://appshunter.io/developer/6799644570) |

## What reviewers say

### The Dojo

[App page](https://appshunter.io/ios/app/the-dojo-math-from-zero/id6792901901)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Pass · 1 month | $11.99 | per month |
| The Pass · 1 year | $95.99 | per year |


### Oyster | Middle School Math

[App page](https://appshunter.io/ios/app/oyster-middle-school-math/id6799644568)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oyster Premium (Monthly) | $19.99 | per month |
| Oyster Premium (Yearly) | $129.00 | per year |


## Frequently asked questions

### Is The Dojo free?

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

### Is Oyster | Middle School Math free?

Oyster | Middle School Math is free to download, with in-app purchases available.

### Do The Dojo or Oyster | Middle School Math have ads?

Neither The Dojo nor Oyster | Middle School Math shows ads.

### Which is updated more often, The Dojo or Oyster | Middle School Math?

The Dojo ships an update every 3 weeks, and Oyster | Middle School Math every 10 days. Most recently, The Dojo was updated on October 20, 2026 and Oyster | Middle School Math on October 1, 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.*