# MemNum vs Cognito

The clearest difference is in-app purchases: MemNum at none against Cognito's 2. Cognito's advantage is iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | MemNum | Cognito |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 11 MB | 123 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mark Gumbs](https://appshunter.io/developer/1177993316) | [Pushp Raj Saurabh](https://appshunter.io/developer/1809537292) |

## What reviewers say

### MemNum

[App page](https://appshunter.io/ios/app/memnum-memory-number-puzzle/id1552442650)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cognito

[App page](https://appshunter.io/ios/app/cognito-brain-training-games/id6744846038)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cognito Pro Membership- Monthly | $4.99 | per month |
| Cognito Pro Membership- Yearly | $29.99 | per year |


## Frequently asked questions

### Is MemNum free?

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

### Is Cognito free?

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

### Do MemNum or Cognito have ads?

Neither MemNum nor Cognito shows ads.

### Which is updated more often, MemNum or Cognito?

MemNum ships an update every 3 weeks, and Cognito every 3 weeks. Most recently, MemNum was updated on October 25, 2026 and Cognito on October 9, 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.*