# RhythmKey vs Bubl Timer

The clearest difference is rating: Bubl Timer at 5.0 against RhythmKey's 2.0. Bubl Timer also leads on in-app purchases (none vs 3) and ratings volume (4 vs 1). RhythmKey's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RhythmKey sells 3 one-off in-app purchases. Bubl Timer asks for nothing beyond the download.

Bubl Timer holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

RhythmKey ships an update every 3 days, Bubl Timer every 4 days. Both last shipped on October 5, 2026.

## The numbers

| Metric | RhythmKey | Bubl Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/rhythmkey-find-bpm-and-keys/id6739074803/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/bubl-timer/id6808853522/reviews)** |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Robin Nap](https://appshunter.io/developer/1782983860) | [FEEL THE ENERGY LLC](https://appshunter.io/developer/6808845018) |

## What reviewers say

### RhythmKey

[App page](https://appshunter.io/ios/app/rhythmkey-find-bpm-and-keys/id6739074803)

Easily determine the tempo and musical key of your audio tracks. This tool offers precise BPM detection through tapping or manual adjustment, along with key matching capabilities to enhance your music production and DJ sets.

**Highlights:** Tap to find BPM, Manual tempo adjustment, Half-time and double-time tempo display, Major scale key matching, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fresh Croissant | $1.99 | one-time |
| Croissant & Jam | $3.99 | one-time |
| Deluxe Breakfast | $5.99 | one-time |


### Bubl Timer

[App page](https://appshunter.io/ios/app/bubl-timer/id6808853522)

This app provides a unique interval timer experience using interactive bubbles. Customize your timers with various visual fills and track your time with live activities and widgets. It offers a simple, intuitive interface for pacing activities without constant attention.

**Highlights:** Bubble-based interval timers, Customizable visual fills (Liquid, Smoke, Snow, Crystals), Live Activities for Lock Screen and Dynamic Island, Home Screen and Lock Screen widgets, Customizable timer symbols, colors, and durations, Historical data visualization (List, Lanes, Cloud), Haptic feedback options

**In-app purchases:** none


## Frequently asked questions

### Is RhythmKey free?

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

### Is Bubl Timer free?

Bubl Timer is free to download, with no in-app purchases.

### Which has better reviews, RhythmKey or Bubl Timer?

Bubl Timer is rated higher. RhythmKey averages 2.0 out of 5 from 1 ratings, while Bubl Timer averages 5.0 from 4 ratings.

### Do RhythmKey or Bubl Timer have ads?

Neither RhythmKey nor Bubl Timer shows ads.

### Which is updated more often, RhythmKey or Bubl Timer?

RhythmKey ships an update every 3 days, and Bubl Timer every 4 days. Most recently, RhythmKey was updated on October 5, 2026 and Bubl Timer on October 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.*