Strum: Guitar Tuner & Lessons

Learn guitar with a Brazilian groove! Tune up in seconds, practice your timing with an accurate metronome and improve with short lessons on MPB, samba, bossa nova, baião and sertanejo.

🎸 REAL-TIME TUNER
• High-precision chromatic tuner (YIN algorithm, low latency)
• Smooth needle, “tighten/loosen” hints and a confirmation when the string is in tune
• Automatic string detection or fixed string
• Reference tone when you tap a string
• Adjustable reference pitch (A4 = 432–444 Hz) and C-D-E or Do-Re-Mi note names
• Pro: 17 alternate tunings — Drop D, half step down, DADGAD, open G/D/E, 7-string guitar, cavaquinho, ukulele, 4- and 5-string bass and viola caipira

⏱️ PRECISE METRONOME
• 30 to 250 BPM, tap tempo
• 2/4, 3/4, 4/4, 6/8, 5/4 and 7/8 time signatures
• Per-beat accents (strong, normal, muted) and subdivisions
• The click is generated straight into the device audio: the tempo never drifts

📚 30 BEGINNER LESSONS
• Posture, tuning, picking hand and fretting hand
• First chords: Em, Am, E, A, D, G, C, Dm, seventh chords and barre chords
• Rhythms of Brazil: marchinha, waltz, guarânia, baião, xote, samba, bossa nova and sertanejo
• Timed exercises with the metronome, a “one-minute changes” drill with personal bests, and daily progress

🎼 216 CHORDS
• Clear diagrams with fingering, barres and open/muted strings
• Hear every chord (strum and arpeggio)
• 3 positions on the neck per chord (Pro)
• Left-handed mode

🎶 PUBLIC-DOMAIN CHORD CHARTS
• Brazilian folk songs and classics such as “Ó Abre Alas”, “Luar do Sertão” and “Com Que Roupa?” (lyrics in the original Portuguese)
• Transpose, auto-scroll and adjustable text size
• Source and license documented for every song

STRUM PRO
Unlock every tuning, all 30 lessons, all 216 chords with voicings and the full songbook, with no ads.
• Monthly or yearly plan • 7-day free trial • Prices shown in your local currency on Google Play
The subscription renews automatically; cancel anytime on Google Play.

PRIVACY
No sign-up. The microphone is only used while the tuner is open, and audio is never recorded or sent anywhere.

Questions and suggestions: [email protected]