# 11x13 vs Oyster | Middle School Math

The clearest difference is iOS requirement: 11x13 at 15.6 against Oyster | Middle School Math's 17.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 11x13 sells 2 in-app purchases, starting at $0.99 per month and Oyster | Middle School Math sells 5 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

11x13 ships an update every 2 weeks, Oyster | Middle School Math fortnightly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 11x13 | Oyster | Middle School Math |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free | — |
| Size | 3 MB | 70 MB |
| Requires iOS | **15.6** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Hennemeyer](https://appshunter.io/developer/352918135) | [Bulvar.co Limited](https://appshunter.io/developer/6799644570) |

## What reviewers say

### 11x13

[App page](https://appshunter.io/ios/app/11x13/id1345978316)

This app offers daily math practice to improve number familiarity and overcome math reservations. It focuses on basic arithmetic operations with visual progress tracking through charts and grids. Daily practice sessions can enhance fundamental mathematical skills.

**Highlights:** Daily math practice, Basic arithmetic operations, Progress visualization, Personalized calculation levels, Leaderboard integration, Number range grids

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Everything – monthly | $0.99 | per month |
| Everything | $5.99 | one-time |


### Oyster | Middle School Math

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oyster Premium (Yearly) | $19.99 | per month |
| Premium Monthly Full Math Lessons | $19.99 | per month |
| Oyster Premium (Monthly) | $19.99 | per month |
| Oyster Premium (Yearly) | $129.00 | per year |
| Premium Yearly Full Math Lessons | $129.99 | per year |


## Frequently asked questions

### Is 11x13 free?

11x13 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 11x13 or Oyster | Middle School Math have ads?

Neither 11x13 nor Oyster | Middle School Math shows ads.

### Which is updated more often, 11x13 or Oyster | Middle School Math?

11x13 ships an update every 2 weeks, and Oyster | Middle School Math fortnightly. Most recently, 11x13 was updated on November 2, 2026 and Oyster | Middle School Math 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.*