OCTAVE: Tuner & Ear Training
Metronome, Vocal Range, Pitch
Only for iPhone
Free
iPhone
Ten offline practice tools: chromatic strobe tuner, pitch hold, metronome, tap tempo, vocal range, scales, chord progressions, ear training, drone, and scope.
OCTAVE is a pocket music toolkit: ten focused tools, one tap from the home screen. Each opens full screen, ready the moment it appears.
TUNE: chromatic tuner
• Strobe ring that spins with your error and closes into one solid ring when you are in tune
• Chromatic, Guitar, Ukulele and Violin modes; tap a string to pin it
• Guitar tunings: Standard, Drop D, DADGAD, Open G
• Reference tone that holds until you stop it, from E1 to C7
• Reference A4 from 415 to 446 Hz; Bb, Eb and F transposing display
HOLD: hold a steady note
• Live pitch trace around a ±10 cent band
• A score from 0 to 100 with offset, wobble, drift and vibrato
• History of your recent holds and the notes you held them on
SCALE: scales and modes
• 14 scales and modes on a pitch circle and a two-octave keyboard
• Drag the circle to change key; tap a key to hear it; play the scale up and down
CHORD: chords and progressions
• 15 chord qualities and 9 progressions in any key
• Smooth voice leading shown on the keyboard as it plays
BEAT: metronome
• 20 to 300 BPM with a swinging pendulum and tempo names
• 4/4, 3/4, 6/8, 5/4, 7/8 or your own meter; accent, normal or mute each beat
• Subdivisions, count-in, three click sounds, haptic pulse
• Tap the pendulum to set the tempo; keeps playing in the background
TAP: tap tempo
• Tap anywhere, or clap into the microphone
• Tempo to one decimal, with stability and a timing strip that shows early and late taps
• Send the tempo straight to BEAT
RANGE: find your vocal range
• Sing low and high; OCTAVE marks your lowest and highest notes, span and voice type
• Your range is kept until you reset it, with a history of sessions
SCOPE: see sound
• Six views: Bloom, Spectrum, Wave, Sparks, Chroma and Level
• Detected note and key; freeze a frame and drag to inspect it
EAR: ear training
• Intervals, chords and scale degrees, answered with one tap
• New answers unlock as you improve; hear every option after you answer
DRONE: drones and pedal tones
• Tanpura, organ, strings or sine in any key, with a mixer for each string
• Fine tuning in cents; keeps playing in the background
Made for iPhone
• In English, Simplified and Traditional Chinese, Japanese, Korean, German, French, Spanish and Brazilian Portuguese
• Every sound is synthesised on the device
Private by design
OCTAVE works offline. Audio from the microphone is analysed on your iPhone and is never recorded or sent anywhere. No account, no analytics, no ads.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• SCOPE: In Wave mode, VoiceOver now reads the pitch and note exactly as shown on screen, including when frozen and in Free run.
• General stability improvements and small fixes.
The developer, Yingzhen Wang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yingzhen Wang
- Size
- 5.2 MB
- Category
- Music
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later.
- iPhone
- Languages
English and 8 more
- English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Yingzhen Wang