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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. No guitar to hand? Switch the drill from Play to Tap: the app names a note and a string — F♯, string 4 — and you find it by tapping the neck. No microphone and no permission, the same spaced repetition, and its own progress and coverage grid.

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. With no guitar to hand, switch it from Play to Tap: the app names a chord and the voice on top — Cmaj7, G on top, top 4 strings — strums it, and you build the grip with four taps, hearing what you built before you commit. Switch once more, to Moves, and the grip you are leaving stays on the neck while only the next chord is named: you build the voicing that moves the voices least, and if what you built is a real voicing of the chord but not the nearest, Compare plays the grip you left, yours, then the nearest, so you hear why. Every transition is its own item, in every key. Play-Along has the same Tap switch for a whole tune: the opening grip is given, and every chord after it is answered from where your hand was left.

Ear trainer

Four tracks, all of them listening practice: the app plays an interval, a chord, a cadence, or a phrase, 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, where you name the quality or, in the Top note variant, the voice singing on top; cadences (ii–V–I, minor ii–V–i, ii–V and more) as voice-led shapes that step across the neck as they sound; and phrases as short jazz lines played over their chords, which you tap back note by note — chord tones, guide-tone connectors, approach notes and enclosures, in every key. Hold any answer to hear it before you commit. Each track opens up in stages as you get it right, a spaced-repetition review brings back whatever you are due, and a coverage grid shows which intervals, qualities, top notes, cadences and phrases you actually know. The listening tracks don’t use the microphone or your guitar. With the guitar in your hands, switch Phrases from Tap to Play: the same line sounds over its chords and you play it back, note by note; Check scores it, the verdict names the first miss, and Show me puts the line on the neck. It keeps its own progress beside the tapped drill’s.

Tools & progress

A chromatic tuner and a metronome with a drum-kit voice round out the trainers. Every drill that asks questions has a finish line: a run of questions (the length is yours to set), a strip that fills as you answer, and a result card with your score and your personal best — checking the answer first is marked, not punished, and the card counts what you knew and what you checked separately. 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. Tell it how long you have and whether you have a guitar, and the day’s workout plans the session: an ordered route across the trainers, each step sized to its share of the time and to how fast you actually answer, handing you on as each step finishes. Each week, a This Week card on the Progress tab reads your log back to you: what you mastered, what is solid, and the one thing to work on next, with a button that starts it. A Home Screen and Lock Screen widget shows your streak and what’s due, or the workout’s next step, and taps straight into it; an optional daily reminder stays quiet unless a streak is about to break or reviews are waiting.

Drop2 is free to start, with no time limit: the Fretboard trainer and its no-guitar Tap drill, the Drop-2 voicing trainer (Learn and Train, Tap and Moves included), ear-training practice in all four tracks, practice runs and personal bests, the Tuner and Metronome, your first workout, and your streak, practice history, widget and weekly report 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 (played, or a whole tune comped by tapping), ear-training stats and spaced-repetition review, the played Phrases drill, the daily practice plan and every workout after your first, 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 Account settings (Settings › your name › Subscriptions), or restore a previous purchase with Restore Purchases on the subscription screen.