Why Pitch Diagram
Pitch Diagram gives you immediate visual feedback on the pitch you produce, whether you're singing, playing violin, practicing trumpet, or tuning a guitar. Built by a musician (I produce electronic music as Signal Flux and taught myself to sing for years), Pitch Diagram was born from wanting a better way to see pitch in detail during practice.
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What's in the App
Pitch Diagram includes nine tools for musicians on iOS and Android. Eight of them are also on the web; Solfege Trainer is app-only.
Pitch Diagram
Real-time pitch graph for monophonic music. See every note you sing or play, with customizable waveform visualization and piano roll background.
Tuner
Cent-accurate chromatic tuner with spectrogram context. See the detected note and how far off you are in real time.
Pitch Spectrogram
See multiple notes simultaneously. Analyze chords, identify harmony voicings, and see harmonic overtones.
Intonation Tracker
Track how close you are to each target note, measured in cents. Perfect for vocal training and intonation practice.
Spectrum Analyzer
Full frequency spectrum visualization from 0 Hz to 8 kHz with logarithmic scale and harmonic analysis.
Tone Generator
Generate reference tones by note name or frequency. Choose between sine, square, triangle, and sawtooth waveforms.
Keyboard
Interactive piano keyboard with sampled instruments, visual feedback, and a compact transport bar for octave selection.
Relative Pitch Interval Training
Train in-key scale degree recognition against a chord progression. Difficulty increases by level as you progress.
Solfege Trainer app only
Same flow as Relative Pitch Interval Training, but you sing the target degree while a pitch diagram tracks you.
Roadmap
What's coming next for Pitch Diagram. This roadmap is fluid and changes based on user feedback and priorities. This roadmap is not a commitment: features, timelines, and platforms may change.
Last updated: May 2026
| Status | Feature | Screens | Added | Platforms | Est. Quarter |
|---|---|---|---|---|---|
| Planned | Scale selection and highlighting of corresponding notes in grid | Pitch Diagram | Oct 2025 | iOSAndroid | Q1 2026 |
| Planned | Enable ambient noise reduction | All | Oct 2025 | iOSAndroid | Q1 2026 |
| Planned | Screen recording | Pitch Diagram | Oct 2025 | iOSAndroid | Q1 2026 |
| Planned | Introduce pro plan with Polyphonic pitch diagram (show harmonics and multiple notes at a time) | New | Oct 2025 | Web | Q2 2026 |
| Planned | Add missing mobile app screens to web version pro plan | Web | Oct 2025 | iOSAndroid | Q3 2026 |
Completed Features
Features that have been completed and are now available.
| Status | Feature | Screens | Added | Platforms | Completed |
|---|---|---|---|---|---|
| Completed | Interactive keyboard with sampled instruments and octave transport | New | May 2026 | iOSAndroid | Q2 2026 |
| Completed | Relative Pitch Interval Training — in-key scale degree recognition over chord progressions | New | May 2026 | iOSAndroid | Q2 2026 |
| Completed | Solfege Trainer — sing scale degrees with live pitch diagram tracking | New | May 2026 | iOSAndroid | Q2 2026 |
| Completed | Support for non-standard tuning systems | All | Oct 2025 | iOSAndroid | Q2 2026 |
| Completed | Piano roll skin for monophonic diagram | Pitch Diagram | Feb 2026 | iOSAndroid | Q1 2026 |
| Completed | Waveform amplitude display for monophonic diagram | Pitch Diagram | Feb 2026 | iOSAndroid | Q1 2026 |
| Completed | Tone generator for manual tuning by ear | New | Oct 2025 | iOSAndroid | Q1 2026 |
| Completed | Spectrum analyzer with note detection | New | Oct 2025 | iOSAndroid | Q1 2026 |
| Completed | Record & Scroll-back functionality | Pitch Diagram | Oct 2025 | iOSAndroid | Q1 2026 |
| Completed | Customizable note range | Pitch Diagram | Oct 2025 | iOSAndroid | Q1 2026 |
| Completed | MIDI recording | All | Oct 2025 | iOSAndroid | Q1 2026 |
| Completed | Polyphonic pitch diagram (show harmonics and multiple notes at a time) | New | Mar 2025 | iOSAndroid | Q4 2025 |
| Completed | Note Transposition | All | Sep 2025 | iOSAndroid | Q4 2025 |
| Completed | Note Transposition | Web | Sep 2024 | Web | Q3 2024 |
Feature Availability
See which features are available on each platform.
Last updated: August 2026
| Feature | Web | iOS | Android |
|---|---|---|---|
| Pitch Diagram | |||
| Tuner | |||
| Intonation Tracker | |||
| Transposition | |||
| Pitch Spectrogram | |||
| Spectrum Analyzer | |||
| Tone Generator | |||
| Screen recording | |||
| MIDI recording | |||
| Keyboard | |||
| Relative Pitch Interval Training | |||
| Solfege Trainer |