# Unlock The Door! vs Impossible 50

The clearest difference is update cadence: Unlock The Door! at every 2 days against Impossible 50's every 9 days. Unlock The Door! also leads on device support (3 vs 1) and iOS requirement (9.0 vs 16.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unlock The Door! ships an update every 2 days, Impossible 50 every 9 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Unlock The Door! | Impossible 50 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/impossible-50-slice-puzzle/id6762080821/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Monetization | Free | Free |
| Size | 151 MB | 41 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [庆龙 刘](https://appshunter.io/developer/1462713107) | [Yigit ERKAL](https://appshunter.io/developer/1870976115) |

## What reviewers say

### Unlock The Door!

[App page](https://appshunter.io/ios/app/unlock-the-door/id1528931070)

A puzzle game where players sort chains to unlock doors. It's a simple yet engaging challenge to avoid getting tangled.

**Highlights:** Chain sorting gameplay, Door unlocking puzzles, Simple mechanics, Engaging challenge

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

**In-app purchases:** none


### Impossible 50

[App page](https://appshunter.io/ios/app/impossible-50-slice-puzzle/id6762080821)

A precision puzzle game where you draw a single line to cut various shapes as close to 50/50 as possible. It offers 150 handcrafted levels with increasing difficulty, from simple shapes to complex objects and animals, with no timers or pressure.

**Highlights:** Draw one line to cut shapes, Achieve 50/50 splits, 150 handcrafted levels, Multiple themed worlds, Precision-based scoring, Daily challenges, No timers

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

**In-app purchases:** none


## Frequently asked questions

### Is Unlock The Door! free?

Unlock The Door! is free to download, with no in-app purchases.

### Is Impossible 50 free?

Impossible 50 is free to download, with no in-app purchases.

### Do Unlock The Door! or Impossible 50 have ads?

Neither Unlock The Door! nor Impossible 50 shows ads.

### Which is updated more often, Unlock The Door! or Impossible 50?

Unlock The Door! ships an update every 2 days, and Impossible 50 every 9 days. Most recently, Unlock The Door! was updated on November 3, 2026 and Impossible 50 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.*