Capo puts Sonid’s chord and scale library on an interactive fretboard for guitar, bass, ukulele, mandolin, and more. The mobile app launches July 4, 2026 — here’s everything waiting on the neck.
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If you learn theory in Sonid and play a stringed instrument, you have probably wished you could see that theory straight on your instrument. Capo by Sonid is that companion: an interactive neck powered by the same chord, scale, and interval catalog as sonid.app, built for study sessions, teaching, and songwriting.
Capo launches on July 4, 2026 on iOS and Android. Explore the product site at getcapo.sonid.app today.
From a quick chord lookup to deep scale study, Capo is the practice surface for Sonid theory on stringed instruments. Switch instruments, tunings, and display modes without leaving the fretboard.
Interactive fretboard
Explore chords, scales, and intervals on a responsive neck diagram. Tap any note for pitch, interval names, chord tones, and links back to Sonid articles.
Sonid theory library
Search and favorite notes, intervals, chords, and scales from the same catalog that powers Sonid — with difficulty filters and tonic controls.
Voicings & positions
Switch between curated guitar voicings from Sonid and study practical fingering for any chord type or root.
Full-neck view
Highlight every chord tone or scale degree across the entire neck instead of staying in one position.
Sonid 3.6.4 is live on iOS and Android with smoother Learn & Analyse, guided tours, a visible streak, and a bigger florin store (boosts, streak shields, combo starters, lesson tokens, and more). On sonid.app: practice deep links, listen & solfege examples, the Music Theory Playground—and Sonid Classroom for teachers is coming soon.
Learn tab
Read theory articles pulled from Sonid for the chord or scale you are viewing, without leaving the app.
Per-note colors & flexible labels
Color each pitch with the Sonid palette. Show note names, interval abbreviations, or fret numbers on the neck.
Light, dark, or system
Match your device or pick a fixed theme. Fretboard themes and note colors stay readable in any mode.
Settings & instrument presets
Switch neck layouts, tunings, string counts, and display options from a single settings hub.
Shareable deep links — Open any chord or scale from a link on the web or straight into Capo, with locale-aware URLs. Share a voicing with a student, drop a scale into a lesson plan, or jump from a Sonid article to the matching neck pattern.
Capo is one app with multiple neck presets. Pick your instrument and tuning, then study with the same Sonid theory tools — including curated chord voicings for guitar, ukulele, and mandolin.
Guitar
Standard tuning, drop variants, open tunings, and 7-string layouts. Browse curated voicing positions from Sonid in standard tuning, or switch to a full-neck view for any chord.
Bass
Map bass lines and harmonic foundations on 4- or 5-string necks. Study scales interval by interval in the low register.
Ukulele
High-G, low-G, D tuning, and baritone layouts. Curated uke voicings you can transpose to any key, plus scale patterns across the shorter fretboard.
Mandolin
Standard GDAE tuning with curated chord voicings and scale patterns. Interval markers help you navigate symmetrical fifths tuning quickly.
Capo Plus is the subscription for players who want ad-free practice and the full library on the neck:
Alternate tunings
Unlock drop D, DADGAD, open tunings, 7-string layouts, and instrument-specific presets with Capo Plus.
Ad-free practice
Subscribe to remove banner ads and keep your focus on the neck during study sessions.
Capo by Sonid arrives July 4, 2026 on the App Store and Google Play. Until then, browse features, instrument use cases, and screenshots on getcapo.sonid.app — and keep building your theory foundation with Sonid.
Already studying with Sonid? Your chords, scales, and articles are waiting on the fretboard.
While you wait for Capo, try the same theory in the Sonid app: