RhythmBud vs Harmonicer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RhythmBud
This app transforms incoming MIDI messages into custom rhythmic patterns using an intuitive editor. It supports various audio routing methods and offers features like snapshots, record mode, and undo/redo.
- MIDI effect processing
- Timeline editor for rhythm patterns
- Strumming, arpeggios, transposition effects
- Snapshots for saving configurations
- Record mode for tapping rhythms
- Undo/redo functionality
- Quantization options
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RhythmBud is a MIDI effect application that would transform incoming MIDI messages into the rhythmic pattern you will create on its editor. Supports AUv3 Audio Unit plugin, Audiobus, Inter-App Audio (IAA), Ableton Link and Core MIDI (Standalone). It sits between a MIDI sender (external hardware or any MIDI controller/sequencer app) and a MIDI receiver (any audio app or external hardware). As long as you connect its MIDI input and output you are good to go. It has a pretty easy-to-use timeline editor, where you can create rhythm patterns. You may add different effects for your every pattern by tapping them on the timeline, such as strumming effects, arpeggios, transposition, velocity manipulation, ratchets and so on. When you are ready, press the play button and start the RhythmBud engine. As long as it receives MIDI notes, it will generate your rhythm pattern and send it to your assigned MIDI output port. Even if you change the playing note/chord, it will adapt instantly! It has a neat feature called “Snapshots” where you can save the current RhythmBud configuration instantly and come back later. You may also control your snapshots via MIDI CC messages or Audio Unit Parameters. You can create a whole song with that feature in your project. It also supports “User Presets” in AUv3 mode. Another great feature is the “Record Mode” where you can record a pattern by tapping the toolbar—like clapping your hands or snapping your fingers for creating a rhythm pattern! Press the “Done” button when you are done. If you are not happy, you can always undo/redo your actions as well. You can also quantize your pattern on different timing levels. If you want to clear everything and start over again, just press the clear button. RhythmBud is using the open-source AudioKit framework under the hood. Also, it offers some other open-source frameworks as well. Check them out on GitHub! AudioKit: https://github.com/AudioKit/AudioKit MusicTheorySwift: https://github.com/cemolcay/MusicTheory MIDIEventKit: https://github.com/cemolcay/MIDIEventKit RBEditorViewController: https://github.com/cemolcay/RBEditorViewController *** Disclaimer: This is not an audio app! It does not generate audio. This is a MIDI effect app that needs both MIDI input and MIDI output routing. It does not transform the MIDI until you creating a pattern and pressing the play button.
Harmonicer
This app generates musical inspiration by combining MIDI quantization, harmonization, and arpeggiation. It offers extensive scale support and allows for the creation of complex chords and rhythmic patterns to enhance musical compositions.
- MIDI Quantizer with 20+ scales
- Custom scale support
- Harmonizer with up to 4 voices
- Arpeggiator with 10 modes
- Process MIDI from any source
- Standalone use with internal keyboard
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Instant Inspiration at Your Fingertips Harmonicer combines MIDI Quantizer, Harmonizer and Arpeggiator into one convenient package. At the core of Harmonicer lies its Quantizer feature with over 20 pre defined scales and support for custom scales. Whether you're a seasoned composer or a novice musician, Harmonicer empowers you to effortlessly create melodies that are harmonically rich and sonically captivating. Unlock Limitless Harmonic Possibilities Harmonicer's Harmonizer functionality takes your compositions to new heights by automatically generating lush chords and harmonies. With up to 4 additional voices and intuitive controls, you can explore a vast array of harmonic possibilities and infuse your music with depth and emotion. Unleash Your Creativity with Dynamic Arpeggiation With Harmonicer's Arpeggiator, intricate rhythmic patterns and melodic sequences are just a few taps away. Whether you're crafting pulsating basslines, mesmerizing synth leads, or intricate melodies, the Arpeggiator empowers you to infuse your tracks with movement and energy, adding a dynamic edge to your music. Combining Power and Versatility What sets Harmonicer apart is its seamless integration of these three powerful tools, allowing users to utilize them individually or in combination to achieve complex compositions with ease. Whether you're looking to fine-tune a melody, enrich your harmonies, or add rhythmic complexity, Harmonicer provides the tools you need to inspire your musical vision and bring it to life. Specs: - Quantizer with support for 20+ pre defined as well as custom scales - Harmonizer with up to 4 additional voices - Arpeggiator with 10 modes, note repeates, ratchets and more - Process MIDI from any source - Standalone use via internal keyboard Supports: - Standalone - AUv3
Screenshots
Verdict
The clearest difference is update cadence: Harmonicer at every 4 days against RhythmBud's monthly. Harmonicer also leads on review sentiment (80% vs 55%). RhythmBud's advantage is price ($4.99 vs $7.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
RhythmBud costs $4.99 and Harmonicer $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.6 for RhythmBud against 4.7 for Harmonicer. Both are backed by a comparable volume of ratings — 21 and 12 respectively. Written reviews are what separate them: 55% of RhythmBud's written reviews are positive against 80% of Harmonicer's.
RhythmBud ships an update monthly, Harmonicer every 4 days. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | RhythmBud | Harmonicer |
|---|---|---|
| Price | $4.99 — better | $7.99 |
| Rating | 4.6 (21 ratings) | 4.7 (12 ratings) — better |
| Positive reviews | 55.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 21 — better | 12 |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Cem Olcay | Kai Aras |
Customer experience
RhythmBud
Harmonicer
In-app purchases
RhythmBud
No in-app purchases
Harmonicer
No in-app purchases









