# Qu4tro vs Mellow Blocks

The clearest difference is ads: Qu4tro at none against Mellow Blocks's shown. Qu4tro also leads on update cadence (every 5 days vs every 6 weeks). Mellow Blocks's advantage is iOS requirement (15.0 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Qu4tro sells 4 one-off in-app purchases and Mellow Blocks sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Qu4tro ships an update every 5 days, Mellow Blocks every 6 weeks. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Qu4tro | Mellow Blocks |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 6 weeks |
| Size | 7 MB | 211 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bruno Morgan](https://appshunter.io/developer/1706583103) | [Onder Genc](https://appshunter.io/developer/1896729124) |

## What reviewers say

### Qu4tro

[App page](https://appshunter.io/ios/app/qu4tro-divisible-by-4/id6759990283)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 40 coins | $0.99 | one-time |
| 120 coins | $1.99 | one-time |
| 360 coins | $3.99 | one-time |
| 1080 coins | $5.99 | one-time |


### Mellow Blocks

[App page](https://appshunter.io/ios/app/mellow-blocks/id6773086496)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Qu4tro free?

Qu4tro is free to download, with in-app purchases available.

### Is Mellow Blocks free?

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

### Do Qu4tro or Mellow Blocks have ads?

Mellow Blocks shows ads; Qu4tro does not.

### Which is updated more often, Qu4tro or Mellow Blocks?

Qu4tro ships an update every 5 days, and Mellow Blocks every 6 weeks. Most recently, Qu4tro was updated on October 9, 2026 and Mellow Blocks on October 8, 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.*