PolyFill vs Mono
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
PolyFill
A brain-training puzzle game where you race against the clock to assemble geometric shapes. Earn points based on difficulty and speed, and compete on leaderboards. Unlock additional complexity and scoring through optional in-app purchases.
- Brain-training puzzles
- Timed challenges
- Geometric shape assembly
- Scoring based on difficulty and time
- Game Center leaderboards
- Achievement awards
- In-app purchases for complexity
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Exercise your brain by racing against the clock to build different geometric shapes from assorted puzzle pieces. Points are awarded based on degree of difficulty and time taken to complete the puzzle. Optionally logging into Game Center allows you to publish your score to a leaderboard and earn achievement awards. Additional game complexity and scoring opportunity can be purchased from within the game.
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 rating: Mono at 5.0 against PolyFill's 2.3. Mono also leads on in-app purchases (none vs 3) and update cadence (every 4 days vs every 6 months). PolyFill's advantage is ratings volume (3 vs 1). On price, ads, device support and iOS requirement 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. PolyFill sells 3 one-off in-app purchases. Mono asks for nothing beyond the download.
Mono holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
PolyFill ships an update every 6 months, Mono every 4 days. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.
| Parameter | PolyFill | Mono |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 6 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 15 MB | 32 MB |
| Age rating | 17+ | 4+ |
| Developer | Kelly Technology Inc. | Tomohiro Ichiba |
In-app purchases
PolyFill
- Remove ads.$1.99
- Unlock level 2$1.99
- Unlock level 3$1.99
Mono
No in-app purchases
