# The Invisible Puzzle vs SortFlow

The clearest difference is in-app purchases: The Invisible Puzzle at none against SortFlow's 3. The Invisible Puzzle also leads on iOS requirement (8.0 vs 17.6). SortFlow's advantage is update cadence (every 6 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. SortFlow sells 3 one-off in-app purchases. The Invisible Puzzle asks for nothing beyond the download.

The Invisible Puzzle ships an update every 5 weeks, SortFlow every 6 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | The Invisible Puzzle | SortFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (4 ratings)](https://appshunter.io/ios/app/the-invisible-puzzle/id1051337548/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | Free | — |
| Size | 13 MB | 13 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Retina Italia Onlus](https://appshunter.io/developer/1450163371) | [Isaac Cocar](https://appshunter.io/developer/1885512860) |

## What reviewers say

### The Invisible Puzzle

[App page](https://appshunter.io/ios/app/the-invisible-puzzle/id1051337548)

Challenge your audio perception by recognizing drawings based solely on sound. Navigate through seven chapters of increasingly complex puzzles, from simple points to detailed objects and characters. This game is designed for everyone and is fully accessible via VoiceOver.

**Highlights:** Audio-based drawing recognition, Seven chapters of puzzles, Accessible via VoiceOver, Simple touch controls, Collects anonymous usage data for research

**Features:** macOS Compatibility

**In-app purchases:** none


### SortFlow

[App page](https://appshunter.io/ios/app/sortflow/id6760651183)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Coins | $0.99 | one-time |
| 1,800 Coins | $2.99 | one-time |
| 4,000 Coins | $4.99 | one-time |


## Frequently asked questions

### Is The Invisible Puzzle free?

The Invisible Puzzle is free to download, with no in-app purchases.

### Is SortFlow free?

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

### Do The Invisible Puzzle or SortFlow have ads?

Neither The Invisible Puzzle nor SortFlow shows ads.

### Which is updated more often, The Invisible Puzzle or SortFlow?

The Invisible Puzzle ships an update every 5 weeks, and SortFlow every 6 days. Most recently, The Invisible Puzzle was updated on November 6, 2026 and SortFlow on November 5, 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.*