KeyItem vs Mono
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
KeyItem
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A mechanism for Universal Basic IncomeUniversal Basic Income through Gaming KeyItem is a virtual universe where everyone can join. Game List: -RENDA!! -Dragotchi Parkour Race -Puzzle Match All games are now available to play for free! ( *｀ω´)
Mono
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.
- Single stone objective
- Jump over stones to eliminate
- Vertical and horizontal jumps
- Minimalist design
- Brain-training gameplay
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This is a puzzle game where the goal is to make the number of stones (black circles) on the board just one. Each stone can jump over another stone next to it in the vertical and horizontal directions. The stone that is jumped over disappears, reducing the number of stones on the board by one. Keep doing this until there is only one stone left on the board.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | KeyItem | Mono |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 days | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 979 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | YUL Foundation | Tomohiro Ichiba |
In-app purchases
KeyItem
No in-app purchases
Mono
No in-app purchases
