ChordBloom vs Audonia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ChordBloom
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ChordBloom turns music theory into a garden. Chords bloom as petals around the key you're in — tap to hear them, wander to neighboring keys, and watch harmony make sense visually. EXPLORE HARMONY BY TOUCH Diatonic chords, the circle of fifths, relative and parallel keys, tritone substitutions, modal interchange — each view lays the theory out as petals you can play. Long-press to cycle extensions (7ths, 9ths, 13ths), choose close, open, or spread voicings, and phrase chords as blocks, strums, or arpeggios. REAL SYNTHESIS, ON DEVICE A full SuperCollider synth engine runs right on your phone alongside classic synth voices — warm pads, plucks, bells, keys, and ambient textures. Every note is synthesized live, and it all works completely offline. AI IMPROVISATION Let the built-in improviser play melodies over your chord changes while you drive the harmony. SAVE YOUR PROGRESSIONS Collect chords into palettes and build progressions you can come back to. MIDI OUTPUT — OPTIONAL UNLOCK Turn ChordBloom into a chord controller for your whole studio: a one-time in-app purchase unlocks BLE MIDI to hardware synths and CoreMIDI to DAWs and other iOS music apps. No account. No ads. No data collected.
Audonia
Develop your musical ear with interactive exercises on intervals, chord qualities, and progressions. Practice essential music theory skills without a teacher, hearing realistic piano sounds and seeing your answers.
- Interval training
- Chord quality identification
- Cadence recognition
- Chord progression analysis
- Real piano sound samples
- Offline functionality
- Light/dark mode
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Ear-training exercises on intervals, chord qualities, cadences, and chord progressions. The cadences and progressions follow common-practice harmony and voice-leading, the style taught in university and conservatory theory courses: the leading tone rises to the tonic, sevenths resolve down, and parallel fifths and octaves are avoided. What you hear sounds like real music, not random notes. Practice the ear-training skills music schools teach and test, on your own, without a teacher at the piano. The exercises: • Intervals: Name the interval between two notes, ascending, descending, or harmonic. • Chord Qualities: Identify a chord's quality across voicings, played as a block or an arpeggio. • Cadences: Recognize Authentic, Plagal, Half, and Deceptive cadences. • Chord Progressions: Identify each chord in a functional progression, with optional inversions and the dominant seventh. Why Audonia: • Compare to hear the difference. After you answer, replay your pick against the correct one. • See what you heard. Every answer names what was played: the notes of an interval or chord, or the chords and their inversions in a cadence or progression. • Endless practice. Every exercise is generated fresh on your phone, so you never run out and never repeat a worksheet. • Works offline. Generation runs entirely on your device; no connection needed. • Light or dark mode. Follows your system preferences, or set it yourself in Settings. • Real piano. Sampled from an actual grand piano, not synthesized tones.
Screenshots
Verdict
The clearest difference is in-app purchases: Audonia at none against ChordBloom's 1. On price, update cadence, ads and device support 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
Both are free to download. ChordBloom sells 1 one-off in-app purchase. Audonia asks for nothing beyond the download.
ChordBloom ships an update every 4 days, Audonia weekly. The most recent releases landed on October 18, 2026 and October 16, 2026 respectively.
| Parameter | ChordBloom | Audonia |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 4 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | James Hurlbut | Nenufar Lane LLC |
In-app purchases
ChordBloom
- MIDI Output$4.99
Audonia
No in-app purchases









