B.L.A.C.K. vs Chordical
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
B.L.A.C.K.
Explore music with interactive audio controls. Isolate individual instruments, create custom mixes, and hear each part of a song distinctly. Access notation and video tutorials online.
- Isolate individual instruments
- Create custom mixes
- Select speaker outputs for tracks
- Multiple play buttons
- Highlighted active instruments
- Access notation and tabs online
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Music composed and performed by Ron Jarzombek Graphics by Ron Jarzombek IDE programming by Ron Jarzombek and Gurpreet Singh Matharoo Produced, mixed and engineered by Ron Jarzombek Midi programming by Ron Jarzombek Also available: 'BLACK - Eye', 'BLACK - Cat', 'BLACK - Widow' and 'BLACK - Tar' from various downloading/streaming outlets. Ron Jarzombek - - lead guitarist and composer of Blotted Science, Spastic Ink and WatchTower, as featured on the CDs… ‘Blotted Science – The Animation Of Entomology’, ‘Blotted Science – The Machinations Of Dementia’, ‘Spastic Ink – Ink Complete’, ‘Spastic Ink – Ink Compatible’, ‘Ron Jarzombek – Solitarily Speaking Of Theoretical Confinement’ 'Ron Jarzombek - PHHHP Plus!' ‘WatchTower – Control And Resistance’, 'WatchTower - Math Concepts: Book One' Other apps: 'Play The Name' 'Razor Blade Babies' a.k.a. 'Rabies' …having also recorded/performed live with Chris Adler (Lamb Of God), Marty Friedman (Megadeth), Alex Webster (Cannibal Corpse), Jeff Loomis (Nevermore), Jens Johansson (Yngwie Malmsteen), Protest The Hero, Obscura, and Gordian Knot. - featured in Joel McIver's '100 Top Metal Guitarists' book (#32) ‘Beyond Life And Cosmic Kinetics' appears via the App 6 track audio player designed by Ron Jarzombek App 6 track operation - Multiple Play buttons let you start from selected points in the song - Highlighted instruments indicate when tracks are active - Each track contains two "speaker" buttons which let you select which instrument you want to hear. You can hear each recorded part by itself or not at all. - The "speaker" buttons also alternate between two different recorded parts or instruments, allowing you various combinations of tracks. Possibilities and options... - Solo each track to hear exactly what is being played. - Create your own mix by choosing whatever tracks you want to hear. - Turn down the lead tracks to compose your own leads and melodies to the original rhythm tracks. - all notation and tab sheets for all tracks are avaiable at http://www.ronjarzombek.com/AppTabs.html - View video tutorial at www.ronjarzombek.com/Apps.html
Chordical
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Chordical is a flashcard-style tool for helping musicians practice and memorize their chords. You can select individual chords and chord qualities you'd like to practice or you can even try the new diatonic chord mode that cycles between random chords in the keys you've selected. Chordical also supports MIDI input, so you can use any MIDI instrument to practice (as long as it supports playing a chord!). The app also supports MIDI clock input so you can sync a backing track from a DAW with the app while you practice so things are a bit more fun. :)
Screenshots
Verdict
The clearest difference is update cadence: Chordical at daily against B.L.A.C.K.'s every 4 months. B.L.A.C.K.'s advantage is iOS requirement (8.0 vs 16.0). 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.
B.L.A.C.K. ships an update every 4 months, Chordical daily. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.
| Parameter | B.L.A.C.K. | Chordical |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 4 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 684 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Ron Jarzombek | Kyle Pointer |
In-app purchases
B.L.A.C.K.
No in-app purchases
Chordical
No in-app purchases



