# Haptic Metronome vs Rainbow Keys

The clearest difference is price: Rainbow Keys at Free against Haptic Metronome's $0.99. Rainbow Keys also leads on update cadence (every 4 days vs every 7 months). Haptic Metronome's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17). On review sentiment, ads and in-app purchases there is nothing between them.

Rainbow Keys is free to download; Haptic Metronome costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Haptic Metronome ships an update every 7 months, Rainbow Keys every 4 days. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Haptic Metronome | Rainbow Keys |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/haptic-metronome/id1482536036/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 34 MB |
| Requires iOS | **13.0** | 17 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Luca Strazzullo](https://appshunter.io/developer/1037198989) | [Matthew Sefton](https://appshunter.io/developer/1726261512) |

## What reviewers say

### Haptic Metronome

[App page](https://appshunter.io/ios/app/haptic-metronome/id1482536036)

This app provides a visual and haptic metronome for musicians. It offers customizable beat groupings with accents and allows for tempo control via tap tempo. Audio can be optionally disabled for a silent practice experience.

**Highlights:** Visual beat pulses, Haptic feedback patterns, Optional audio metronome, Customizable time signatures, Tap Tempo feature, Beat grouping with accents, Spotlight search integration

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Rainbow Keys

[App page](https://appshunter.io/ios/app/rainbow-keys/id6476235636)

Learn piano scales and chords with augmented reality. This app overlays key names onto your keyboard, aiding real-time learning for improvisation and music theory.

**Highlights:** Augmented reality key display, Object recognition for keyboards, Selectable scales and chords, Real-time learning, Music theory education, Improvisation aid

**In-app purchases:** none


## Frequently asked questions

### Is Haptic Metronome free?

Haptic Metronome costs $0.99, with no in-app purchases.

### Is Rainbow Keys free?

Rainbow Keys is free to download, with no in-app purchases.

### Do Haptic Metronome or Rainbow Keys have ads?

Neither Haptic Metronome nor Rainbow Keys shows ads.

### Which is updated more often, Haptic Metronome or Rainbow Keys?

Haptic Metronome ships an update every 7 months, and Rainbow Keys every 4 days. Most recently, Haptic Metronome was updated on November 11, 2026 and Rainbow Keys on November 4, 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.*