# Modulo vs GreyOut

The clearest difference is in-app purchases: Modulo at none against GreyOut's 1. Modulo also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). GreyOut's advantage is ads (none vs shown). On price and update cadence there is nothing between them.

Both are free to download. GreyOut sells 1 one-off in-app purchase. Modulo asks for nothing beyond the download.

Modulo ships an update every 9 days, GreyOut every 5 days. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Modulo | GreyOut |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 75 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mehmet Gueven](https://appshunter.io/developer/1802257582) | [Haktan Kocyigit](https://appshunter.io/developer/1896590261) |

## What reviewers say

### Modulo

[App page](https://appshunter.io/ios/app/modulo-infinite-logic-puzzle/id6757111303)

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

**In-app purchases:** none


### GreyOut

[App page](https://appshunter.io/ios/app/greyout-lights-off/id6768617894)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Expert Levels | $0.99 | one-time |


## Frequently asked questions

### Is Modulo free?

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

### Is GreyOut free?

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

### Do Modulo or GreyOut have ads?

Modulo shows ads; GreyOut does not.

### Which is updated more often, Modulo or GreyOut?

Modulo ships an update every 9 days, and GreyOut every 5 days. Most recently, Modulo was updated on October 21, 2026 and GreyOut on October 25, 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.*