Delvr vs Chord Trees
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delvr
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How Delvr Works Delvr helps you understand any topic through layered explanations: • Simple – a clear, plain-language overview • Why / How – deeper context and reasoning • Expert Peek – a more advanced look for curious learners Users can enter a question and immediately explore explanations at different depths, all within a single flow. Access & Usage • Delvr is currently fully free to use. • No account, login, or subscription is required. • All explanation layers are available without restrictions.
Chord Trees
This interactive tool helps musicians visualize and understand chord connections. Explore harmony, compare instrument voicings, and practice ear training with arpeggio loops. Designed for students, songwriters, producers, and teachers.
- Interactive chord tree visualization
- Piano chord inversions
- Guitar chord fingerings
- Diatonic harmony exploration
- Arpeggio loop playback
- Multiple instrument sounds
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Chord Trees is an interactive harmony practice tool by Nathaniel School of Music for musicians who want to see, hear, and understand how chords connect. Build chord trees from notes, explore diatonic harmony, compare piano inversions and guitar fingerings, and loop arpeggios with real instrument sounds. The app is designed for students, songwriters, producers, and teachers who want a visual way to internalize chord progressions. FEATURES * Interactive chord tree visualization * Piano chord inversions and keyboard layouts * Guitar chord fingerings and voicing options * Diatonic mode with major-scale harmony and modes * Arpeggio loop playback for ear training * Instrument combinations including piano, guitar, strings, brass, synth, harp, and marimba * Beginner, intermediate, and advanced learning modes * Works without an account BY NATHANIEL SCHOOL OF MUSIC Built for practical music learning, chord fluency, and composition practice.
Screenshots
Verdict
The clearest difference is update cadence: Chord Trees at every 5 days against Delvr's fortnightly. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Delvr ships an update fortnightly, Chord Trees every 5 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | Delvr | Chord Trees |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Maevin Labs LLC | Jason Zachariah |
In-app purchases
Delvr
No in-app purchases
Chord Trees
No in-app purchases









