# PolyFill vs Mono

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.

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.

## The numbers

| Metric | PolyFill | Mono |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/polyfill/id987147033/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mono-puzzles/id6475032746/reviews)** |
| Number of ratings | **3** | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 15 MB | 32 MB |
| Requires iOS | 14.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Kelly Technology Inc.](https://appshunter.io/developer/393931941) | [Tomohiro Ichiba](https://appshunter.io/developer/1686104527) |

## What reviewers say

### PolyFill

[App page](https://appshunter.io/ios/app/polyfill/id987147033)

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.

**Highlights:** Brain-training puzzles, Timed challenges, Geometric shape assembly, Scoring based on difficulty and time, Game Center leaderboards, Achievement awards, In-app purchases for complexity

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads. | $1.99 | one-time |
| Unlock level 2 | $1.99 | one-time |
| Unlock level 3 | $1.99 | one-time |


### 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 PolyFill free?

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

### Is Mono free?

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

### Which has better reviews, PolyFill or Mono?

Mono is rated higher. PolyFill averages 2.3 out of 5 from 3 ratings, while Mono averages 5.0 from 1 ratings.

### Do PolyFill or Mono have ads?

Both PolyFill and Mono show ads.

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

PolyFill ships an update every 6 months, and Mono every 4 days. Most recently, PolyFill was updated on September 18, 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.*