# 11x13 vs immlab

The clearest difference is in-app purchases: immlab at none against 11x13's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 11x13 sells 2 in-app purchases, starting at $0.99 per month. immlab asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 11x13 | immlab |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 3 MB | 49 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Hennemeyer](https://appshunter.io/developer/352918135) | [immlab](https://appshunter.io/developer/1773315086) |

## 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 |


### immlab

[App page](https://appshunter.io/ios/app/immlab/id6736770228)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 11x13 free?

11x13 is free to download, with in-app purchases available.

### Is immlab free?

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

### Do 11x13 or immlab have ads?

Neither 11x13 nor immlab shows ads.

### Which is updated more often, 11x13 or immlab?

11x13 ships an update every 2 weeks, and immlab every 2 weeks. Most recently, 11x13 was updated on October 12, 2026 and immlab on October 3, 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.*