# Obby's Prison Escape vs Harmonic Drive

The clearest difference is review sentiment: Harmonic Drive at 100% against Obby's Prison Escape's 15%. Harmonic Drive also leads on rating (5.0 vs 2.9) and ads (none vs shown). Obby's Prison Escape's advantage is in-app purchases (none vs 10) and ratings volume (40 vs 1). On price and device support there is nothing between them.

Both are free to download. Harmonic Drive sells 10 one-off in-app purchases. Obby's Prison Escape asks for nothing beyond the download.

Harmonic Drive holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: Obby's Prison Escape has 40 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 15% of Obby's Prison Escape's written reviews are positive against 100% of Harmonic Drive's.

Obby's Prison Escape ships an update every 6 weeks, Harmonic Drive weekly. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Obby's Prison Escape | Harmonic Drive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (40 ratings)](https://appshunter.io/ios/app/obbys-prison-escape/id6449582334/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/harmonic-drive/id6760219038/reviews)** |
| Number of ratings | **40** | 1 |
| Positive reviews | 15.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 393 MB | 658 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | +4 | 4+ |
| Developer | [Aoi Sora](https://appshunter.io/developer/1425932277) | [Kareel Hicks](https://appshunter.io/developer/1872282657) |

## What reviewers say

### Obby's Prison Escape

[App page](https://appshunter.io/ios/app/obbys-prison-escape/id6449582334)

Test your bravery against a formidable opponent in this challenging game. Outwit your adversary by anticipating their every move and executing your strategy flawlessly. Prove your skills and emerge victorious.

**Highlights:** Strategic gameplay, Challenging opponent, Anticipate moves, Test your courage, Outwit adversary

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

**In-app purchases:** none


### Harmonic Drive

[App page](https://appshunter.io/ios/app/harmonic-drive/id6760219038)

Experience a high-energy rhythm game where precise timing is key. Tap, hold, and flow through dynamic note charts with vibrant visuals and challenging difficulty levels. Master the beat and chase high scores with a satisfying combo system.

**Highlights:** Dynamic note charts, Multiple difficulty levels, Multiplayer & Leaderboards, Responsive controls, Visually immersive interface, Performance-based scoring, Combo system

**Features:** Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Right Now | $0.99 | one-time |
| We Were Infinite | $0.99 | one-time |
| Say It | $0.99 | one-time |
| Open Skies | $0.99 | one-time |
| I Still Choose You | $0.99 | one-time |
| Space Drift | $0.99 | one-time |
| Lightwalk | $0.99 | one-time |
| I Found Your Name Inside A Notebook | $0.99 | one-time |
| Innerself v2 | $0.99 | one-time |
| Tenacity | $0.99 | one-time |


## Frequently asked questions

### Is Obby's Prison Escape free?

Obby's Prison Escape is free to download, with no in-app purchases.

### Is Harmonic Drive free?

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

### Which has better reviews, Obby's Prison Escape or Harmonic Drive?

Harmonic Drive is rated higher. Obby's Prison Escape averages 2.9 out of 5 from 40 ratings, while Harmonic Drive averages 5.0 from 1 ratings.

### Do Obby's Prison Escape or Harmonic Drive have ads?

Obby's Prison Escape shows ads; Harmonic Drive does not.

### Which is updated more often, Obby's Prison Escape or Harmonic Drive?

Obby's Prison Escape ships an update every 6 weeks, and Harmonic Drive weekly. Most recently, Obby's Prison Escape was updated on November 10, 2026 and Harmonic Drive on October 31, 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.*