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Fretboard trainer

Hear or see a note, then play it on your guitar. The app detects the pitch in real time and tells you if you’re right. Work through the naturals first, then add sharps and flats, until you know every note across the neck. Spaced repetition keeps resurfacing the notes you find hardest, and a dashboard tracks your coverage and accuracy.

Scales & arpeggios

Play the ascending one-octave scale or arpeggio for a root and chord quality. Each note is checked by ear, in any position, and a full-neck diagram colors the chord tones so you can see the shape. Practice what you choose, or let the app review what you’re due.

Lines — solo over the changes

A backing band (walking bass and drums) loops a progression or tune you pick, in any key — the ii–V, the blues, the bird blues, rhythm changes, the Coltrane cycle, Take the A Train, So What, Blue Bossa, Autumn Leaves, All the Things You Are, and more. In Targets mode the app prescribes the guide tone to land on in each bar; in Free mode it classifies every note you play as a chord tone, a tension, a note to avoid, or outside the chord-scale altogether. Scoring works over your phone’s speaker, where an on-device model picks your guitar out of the band, or through wired headphones, which keep the band out of the mic altogether. Bluetooth is the one route that cannot score — it adds delay and lets the band in.

Drop-2 voicing trainer

Learn and drill drop-2 chord voicings — the staple jazz-guitar voicing the app is named after. Browse every inversion of maj7, 7, m7, m7♭5, dim7, and mMaj7 chords across three string sets and hear them played back (Learn), quiz yourself by playing the named voicing (Train), or comp your voicings in time over the backing band (Play-Along). In Train you can answer a note at a time, lowest string upward, or strum the whole shape — a strum is checked note by note, octave and all, so the app tells one inversion from another. Train also covers ii–V progressions and keeps a daily spaced-repetition review.

Ear trainer

Three screens, all of them listening practice: the app plays an interval, a chord quality, or a cadence, and you answer on the neck. Intervals appear as degree-labeled circles on a fretboard pad, chords as real drop-2 voicings in any inversion, and cadences — ii–V–I, minor ii–V–i, ii–V and more — as voice-led shapes that step across the neck as they sound. Hold any answer to hear it before you commit. Intervals and chords open up in stages as you get them right, a spaced-repetition review brings back whatever you are due, and a coverage grid shows which intervals, qualities and cadences you actually know. The ear trainer doesn’t use the microphone or your guitar.

Tools & progress

A chromatic tuner and a metronome with a drum-kit voice round out the trainers. The Progress tab shows your current streak, an activity heatmap, accuracy trends, and a daily practice plan that targets exactly what you’re due to review. A Home Screen and Lock Screen widget shows your streak and what’s due and taps straight into the review, and an optional daily reminder stays quiet unless something really is due.

Drop2 is free to start, with no time limit: the Fretboard trainer, the Drop-2 voicing trainer (Learn and Train), ear-training practice, the Tuner and Metronome, and your streak, practice history and widget are all free.

A Premium subscription unlocks the full coach: the Scales & Arpeggios trainer, the Lines (solo over the changes) trainer, Drop-2 Play-Along, ear-training stats and spaced-repetition review, the daily practice plan, and long-term accuracy charts.

Premium is available as a monthly or annual subscription, each starting with a 7-day free trial. It costs US $8.99 a month or US $44.99 a year — in Germany €9.99 / €49.99, in the UK £8.99 / £44.99, in Japan ¥1,500 / ¥7,000; other regions pay the equivalent local price, and your App Store confirms the exact price before you subscribe. Subscriptions renew automatically until canceled. You can manage, change, or cancel anytime in your Apple ID settings (Settings › your name › Subscriptions), or restore a previous purchase with Restore Purchases on the subscription screen.