# Reflex Training vs Harmonic Drive

The clearest difference is rating: Harmonic Drive at 5.0 against Reflex Training's 4.3. Harmonic Drive also leads on ads (none vs shown). Reflex Training's advantage is monetization model (ad-supported vs free with in-app purchases) and ratings volume (4 vs 1). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Reflex Training sells 1 one-off in-app purchase and Harmonic Drive sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Harmonic Drive holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Reflex Training ships an update every 5 days, Harmonic Drive weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Reflex Training | Harmonic Drive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/reflex-training-piano-rush/id6757512194/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/harmonic-drive/id6760219038/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 7 MB | 658 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hai Nam Trinh](https://appshunter.io/developer/1139152400) | [Kareel Hicks](https://appshunter.io/developer/1872282657) |

## What reviewers say

### Reflex Training

[App page](https://appshunter.io/ios/app/reflex-training-piano-rush/id6757512194)

This rhythm game challenges you to catch falling musical notes to complete famous songs. Slide to collect blue notes and avoid red ones to keep the melody flowing. Enjoy a modern visual experience with progressive difficulty and compete globally.

**Highlights:** Catch falling music notes, Complete famous songs note by note, Avoid red discord notes, Progressive difficulty levels, Modern neon-style interface, Global leaderboard competition, 100% public domain music

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Premium | $1.99 | one-time |


### 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 Reflex Training free?

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

### Is Harmonic Drive free?

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

### Which has better reviews, Reflex Training or Harmonic Drive?

Harmonic Drive is rated higher. Reflex Training averages 4.3 out of 5 from 4 ratings, while Harmonic Drive averages 5.0 from 1 ratings.

### Do Reflex Training or Harmonic Drive have ads?

Reflex Training shows ads; Harmonic Drive does not.

### Which is updated more often, Reflex Training or Harmonic Drive?

Reflex Training ships an update every 5 days, and Harmonic Drive weekly. Most recently, Reflex Training was updated on November 5, 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.*