IntonationPro: Tuner & Pitch

Play in tune – and see it happen. IntonationPro listens while you practice and shows every note as a smooth, color-coded curve: green when you are in tune, orange or red when you drift. You see instantly whether you are sharp or flat, and by how many cents.

Made by Viennese violinist and conductor Daniel Auner for everyone who plays a string or wind instrument or sings – and wants to hear and see clean intonation.

NEW IN 1.3
• Singer mode – train your voice: a reference tone to sing back, held notes, clean onsets and your vocal range
• Key recognition (iOS 27): IntonationPro recognizes the key from your first phrases and suggests it – analyzed entirely on your device
• Siri & Shortcuts: say “Start a practice session in IntonationPro” or put it on the Action button
• Larger views on iPad for progress, settings and sharing

TRAIN YOUR VOICE
• Singer mode: a clear view without keys and tunings – just your voice and the curve
• Reference tone: hear your starting note, then sing it back
• Held notes: how steady you hold a note, and whether your voice sinks or rises
• Onsets: do you hit the note right away or scoop into it from below or above?
• Vibrato done right: IntonationPro finds the center of your vibrato and knows singers usually swing down from the note, not above it – so your vibrato is not marked flat
• Your vocal range per session and over days

REAL-TIME FEEDBACK
• Precise pitch detection with low latency
• A flowing curve that makes vibrato, glissandi and intonation drift visible
• Note name, deviation in cents and scale degree at a glance
• Golden sparkles and a smiley when you play a beautiful vibrato in tune (optional)
• A hint when a passage is too fast for the detector

MUSICAL, NOT JUST TECHNICAL
• All 24 major and minor keys – natural, harmonic and melodic minor
• Three tuning systems: equal temperament, just intonation and Pythagorean
• Concert pitch from 415 Hz (Baroque) to 446 Hz
• Three tolerance levels: strict, standard and relaxed

AFTER EVERY SESSION
• Overall score and a compressed curve of the whole session
• Note-by-note analysis: which notes tend to be sharp or flat
• Practice streak, days practiced and trends compared with the previous week or month
• Share your result as a Story or Post image for Instagram, WhatsApp and more

MADE FOR YOUR INSTRUMENT
• Violin, viola, cello, double bass, voice, woodwinds and brass
• Extended low range for deep instruments
• Supports USB audio interfaces and external microphones
• Portrait and landscape, on iPhone and iPad

PRIVATE BY DESIGN
• Works completely offline
• Your audio is analyzed on your device – never recorded, never uploaded
• No account, no ads, no tracking

FREE & PREMIUM
• Free: 5 minutes of practice per day with all features
• Premium: unlimited practice time as a one-time purchase – no subscription

Available in English, German, French, Japanese, Korean and Simplified Chinese.