# Flat vs Hidden Blocks

The clearest difference is in-app purchases: Flat at none against Hidden Blocks's 9. Hidden Blocks's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Hidden Blocks sells 9 one-off in-app purchases. Flat asks for nothing beyond the download.

Flat ships an update every 2 weeks, Hidden Blocks weekly. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Flat | Hidden Blocks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hidden-blocks-cube-counting/id6776471897/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 102 MB | 89 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [masanao matsui](https://appshunter.io/developer/1232130754) | [Logan Land](https://appshunter.io/developer/1896703411) |

## What reviewers say

### Flat

[App page](https://appshunter.io/ios/app/flat-daily-3d-brain-puzzle/id1609852968)

A minimalist 3D puzzle game where players move cubes into black holes to flatten the board. It offers 50 stages with increasing complexity and intuitive swipe controls for an immersive experience.

**Highlights:** 3D puzzle gameplay, Minimalist design, 50 challenging stages, Intuitive swipe controls, Progressive mechanics

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

**In-app purchases:** none


### Hidden Blocks

[App page](https://appshunter.io/ios/app/hidden-blocks-cube-counting/id6776471897)

This 3D logic puzzle challenges you to count blocks in stacked structures, including those hidden from view. It offers daily puzzles, practice modes, and competitive stages with leaderboards. Sharpen your spatial reasoning skills with engaging brain teasers.

**Highlights:** 3D block counting puzzles, Count all or hidden blocks, Daily challenges, Practice mode, Timed stages with leaderboards, Spatial reasoning training

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Gems | $0.99 | one-time |
| 20 Gems | $1.99 | one-time |
| Unlimited Play · 3 Hours | $2.99 | one-time |
| 50 Gems | $4.99 | one-time |
| Unlimited Play · 24 Hours | $6.99 | one-time |
| Remove ads | $7.99 | one-time |
| 125 Gems | $9.99 | one-time |
| 250 Gems | $19.99 | one-time |
| 700 Gems | $49.99 | one-time |


## Frequently asked questions

### Is Flat free?

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

### Is Hidden Blocks free?

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

### Do Flat or Hidden Blocks have ads?

Both Flat and Hidden Blocks show ads.

### Which is updated more often, Flat or Hidden Blocks?

Flat ships an update every 2 weeks, and Hidden Blocks weekly. Most recently, Flat was updated on October 24, 2026 and Hidden Blocks on October 28, 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.*