# Block Harmonics vs Illusion Corridor

The clearest difference is in-app purchases: Block Harmonics at none against Illusion Corridor's 1. Block Harmonics also leads on device support (3 vs 1). Illusion Corridor's advantage is ads (none vs shown) and update cadence (every 2 days vs every 8 days). On price and iOS requirement there is nothing between them.

Both are free to download. Illusion Corridor sells 1 one-off in-app purchase. Block Harmonics asks for nothing beyond the download.

Block Harmonics ships an update every 8 days, Illusion Corridor every 2 days. The most recent releases landed on October 15, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Block Harmonics | Illusion Corridor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/illusion-corridor/id6800756593/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 3 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ikuya Terasaka](https://appshunter.io/developer/1163471139) | [Qingyu Chen](https://appshunter.io/developer/1629701754) |

## What reviewers say

### Block Harmonics

[App page](https://appshunter.io/ios/app/block-harmonics/id6752220613)

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

**In-app purchases:** none


### Illusion Corridor

[App page](https://appshunter.io/ios/app/illusion-corridor/id6800756593)

This isometric puzzle game challenges players to manipulate perspective and mechanisms to create impossible paths. Explore seven chapters with 65 handcrafted levels, featuring rotating bridges, sliding platforms, and more. Enjoy a quiet, offline experience with no ads or in-app purchases after the initial unlock.

**Highlights:** Isometric perspective puzzles, Manipulate mechanisms and platforms, 65 handcrafted levels, Offline play, No ads or subscriptions, Multiple languages supported

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game | $2.99 | one-time |


## Frequently asked questions

### Is Block Harmonics free?

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

### Is Illusion Corridor free?

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

### Do Block Harmonics or Illusion Corridor have ads?

Block Harmonics shows ads; Illusion Corridor does not.

### Which is updated more often, Block Harmonics or Illusion Corridor?

Block Harmonics ships an update every 8 days, and Illusion Corridor every 2 days. Most recently, Block Harmonics was updated on October 15, 2026 and Illusion Corridor on October 18, 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.*