# KeyItem vs Mono

The clearest difference is ads: KeyItem at none against Mono's shown. Mono's advantage is update cadence (every 4 days vs every 11 days) and iOS requirement (13.4 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KeyItem ships an update every 11 days, Mono every 4 days. The most recent releases landed on September 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | KeyItem | Mono |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mono-puzzles/id6475032746/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 4 days** |
| Monetization | — | Ad-supported |
| Size | 979 MB | 32 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YUL Foundation](https://appshunter.io/developer/1809368563) | [Tomohiro Ichiba](https://appshunter.io/developer/1686104527) |

## What reviewers say

### KeyItem

[App page](https://appshunter.io/ios/app/keyitem/id6467468587)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mono

[App page](https://appshunter.io/ios/app/mono-puzzles/id6475032746)

A minimalist puzzle game where players aim to reduce the number of stones on a board to a single one. Stones can jump over adjacent stones, removing the jumped stone. This strategic elimination continues until only one stone remains.

**Highlights:** Single stone objective, Jump over stones to eliminate, Vertical and horizontal jumps, Minimalist design, Brain-training gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KeyItem free?

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

### Is Mono free?

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

### Do KeyItem or Mono have ads?

Mono shows ads; KeyItem does not.

### Which is updated more often, KeyItem or Mono?

KeyItem ships an update every 11 days, and Mono every 4 days. Most recently, KeyItem was updated on September 5, 2026 and Mono on September 15, 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.*