# Doors QA vs Aphelion

The clearest difference is in-app purchases: Doors QA at none against Aphelion's 1. Doors QA also leads on iOS requirement (12.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Aphelion sells 1 one-off in-app purchase. Doors QA asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on October 10, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Doors QA | Aphelion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (17 ratings)](https://appshunter.io/ios/app/aphelion-gravity-puzzles/id6783244546/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 days | Every 2 days |
| Monetization | — | Free with in-app purchases |
| Size | 100 MB | 29 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Michio Hara](https://appshunter.io/developer/1770449622) | [JIUSONG GAO](https://appshunter.io/developer/6783244548) |

## What reviewers say

### Doors QA

[App page](https://appshunter.io/ios/app/doors-qa/id6717586751)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aphelion

[App page](https://appshunter.io/ios/app/aphelion-gravity-puzzles/id6783244546)

Guide a comet through celestial bodies and obstacles using precise flicks. Solve physics-based puzzles across five distinct chapters with over 50 handcrafted levels. Experience a minimalist, timer-free approach to space exploration.

**Highlights:** Flick-based aiming and trajectory control, Gravity-driven orbital mechanics, 50 handcrafted levels across 5 chapters, Minimalist, timer-free gameplay, Steer comets and capture celestial bodies

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Hints | $3.99 | one-time |


## Frequently asked questions

### Is Doors QA free?

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

### Is Aphelion free?

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

### Do Doors QA or Aphelion have ads?

Both Doors QA and Aphelion show ads.

### Which is updated more often, Doors QA or Aphelion?

Doors QA ships an update every 2 days, and Aphelion every 2 days. Most recently, Doors QA was updated on October 10, 2026 and Aphelion on October 23, 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.*