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Three-Panel Overtone Analysis<\/h2>\n
Most tuners show you a single detected pitch. OverTune shows you the full picture.<\/p>\n
Three independent tuning panels analyze your sound simultaneously:<\/p>\n
- \n
- Fundamental<\/strong> \u2014 The base pitch of your note<\/li>\n
- Octave<\/strong> \u2014 The second harmonic, one octave above<\/li>\n
- Compound Fifth<\/strong> \u2014 The third harmonic, a perfect twelfth above the fundamental<\/li>\n<\/ul>\n
Each panel has its own frequency spectrum, needle gauge, and note history graph. Select any note from C1 to B7, and all three panels configure automatically with the correct frequency ranges for that note’s overtone series.<\/p>\n
This is especially valuable for handpan builders and tuners, where getting the fundamental, octave, and compound fifth in precise alignment is essential for a rich, balanced tone.<\/p>\n
\nReal-Time Spectral Analysis<\/h2>\n
OverTune uses FFT-based (Fast Fourier Transform) spectral analysis with sub-bin accuracy for frequency detection that goes well beyond what standard tuners offer.<\/p>\n
Each panel displays a live logarithmic frequency spectrum showing the energy distribution across the frequency range. You can see exactly where your sound’s energy is concentrated \u2014 not just the strongest peak, but the full spectral shape.<\/p>\n
Adjustable detection range<\/strong> \u2014 Drag the green teardrop anchors at the top of each spectrum to narrow or widen the frequency window. This lets you isolate the exact harmonic you want to tune, ignoring interference from other overtones or ambient noise.<\/p>\n
Amplitude threshold<\/strong> \u2014 Use the orange slider on the right side of each spectrum to set a noise floor. Only peaks above this threshold are detected, filtering out background noise and giving you clean, reliable readings. A global default threshold for all panels can be set in Settings \u2192 Detection Sensitivity, with per-panel fine-tuning available at any time.<\/p>\n
\nNeedle Gauge with Cent Deviation<\/h2>\n
Each panel features a precision needle gauge showing your tuning accuracy in cents \u2014 the musician’s standard unit for fine pitch measurement.<\/p>\n
- \n
- The gauge spans \u00b150 cents<\/strong> with tick marks every 10 cents<\/li>\n
- A bright green zone<\/strong> at center marks the sweet spot: within 5 cents<\/strong> of perfect pitch<\/li>\n
- The needle’s base indicator changes color as you approach the target: green<\/strong> when in-tune, yellow<\/strong> when close, and red<\/strong> when far off<\/li>\n
- Smooth spring animation provides natural, responsive needle movement<\/li>\n<\/ul>\n
Alongside the gauge, you’ll see the detected note name, exact frequency in Hz, and cent deviation \u2014 all updating in real time.<\/p>\n
\nStroboscope Visualization<\/h2>\n
OverTune includes a stroboscopic tuning display \u2014 a classic technique used by professional tuners, now brought to your screen as a live animated background in the needle gauge.<\/p>\n
When enabled, an animated pattern fills the upper half of each gauge. The pattern scrolls continuously, with its speed directly tied to how far off pitch you are:<\/p>\n
- \n
- Stationary<\/strong> \u2014 perfectly in tune (0 cents deviation)<\/li>\n
- Slow scroll<\/strong> \u2014 close to the target (within 5 cents), shown in green<\/li>\n
- Moderate scroll<\/strong> \u2014 approaching the target (within 20 cents), shown in yellow<\/li>\n
- Fast scroll<\/strong> \u2014 significantly off pitch, shown in red<\/li>\n<\/ul>\n
The pattern stops entirely when no audio signal is detected, saving battery.<\/p>\n
Two pattern styles are available in Settings:<\/p>\n
- \n
- Chevron<\/strong> \u2014 Repeating V-shaped bands that create a classic strobe effect<\/li>\n
- Sine Wave<\/strong> \u2014 Smooth curved bands for a softer, flowing appearance<\/li>\n
- Square<\/strong> \u2014 Hard-edged alternating blocks for the most striking on\/off strobe effect<\/li>\n<\/ul>\n
The stroboscope is optional and off by default. Enable it in Settings under the Stroboscope section, where you can also select your preferred pattern style.<\/p>\n
\nNote History Graph<\/h2>\n
Tuning is not just about hitting the right pitch \u2014 it’s about holding<\/strong> it there. The note history graph gives you a visual record of your tuning stability over time.<\/p>\n
The graph plots your detected pitch continuously, showing how it moves relative to your target note. Four direction modes are available in Settings:<\/p>\n
- \n
- Left \u2192 Right<\/strong> \u2014 The classic rolling-paper view. Time moves left to right, most recent reading at the left edge. Covers \u00b12 semitones<\/strong> from center, with note names labeled on the left side.<\/li>\n
- Right \u2192 Left<\/strong> \u2014 Same \u00b12 semitone range, time flowing in the opposite direction.<\/li>\n
- Top \u2192 Bottom<\/strong> \u2014 Time flows downward, most recent reading at the top. Covers a wider \u00b16 semitones<\/strong> from center, with note names and octave numbers labeled across the top edge.<\/li>\n
- Bottom \u2192 Top<\/strong> \u2014 Same \u00b16 semitone range, time flowing upward.<\/li>\n<\/ul>\n
Grid lines at semitone boundaries give context in all modes, and a subtle green highlight marks the in-tune zone at the center. Use this to see whether your instrument’s pitch is stable, drifting, or oscillating \u2014 essential information for fine-tuning adjustments.<\/p>\n
\nFocus Modes<\/h2>\n
Switch between two spectrum display modes to match your tuning workflow:<\/p>\n
- \n
- Narrow<\/strong> \u2014 Shows a wide frequency range around each target note, useful for initial tuning and finding the right harmonic<\/li>\n
- Tight<\/strong> \u2014 Zooms in to just \u00b12 semitones from each target, giving you maximum resolution for fine-tuning<\/li>\n<\/ul>\n
Toggle between modes with a single tap using the focus button next to the note selector.<\/p>\n
\nInstrument Presets<\/h2>\n
OverTune includes an extensive library of instrument presets to speed up your workflow:<\/p>\n
Handpan Scales<\/h3>\n
21 popular handpan scale layouts including Kurd, Celtic Minor, Integral, Pygmy, Hijaz, Amara, Akebono, and many more. Select any root note and scale pattern to instantly filter the note selector to just the notes in that scale.<\/p>\n
Musical Scales<\/h3>\n
20 scales across three categories:<\/p>\n
- \n
- Basic<\/strong> \u2014 Major, Natural Minor, Harmonic Minor, Melodic Minor, Pentatonic Major, Pentatonic Minor, Blues<\/li>\n
- Modes<\/strong> \u2014 Dorian, Phrygian, Lydian, Mixolydian, Locrian, Whole Tone, Chromatic<\/li>\n
- World<\/strong> \u2014 Hijaz, Akebono, Hungarian Minor, Arabic, Persian, Japanese<\/li>\n<\/ul>\n
Select any root note and scale type to see all matching notes across the full range.<\/p>\n
String Instruments<\/h3>\n
13 common string instrument tunings ready to use:<\/p>\n
- \n
- Guitar: Standard, Drop D, Open D, Open G, DADGAD, Half-Step Down<\/li>\n
- Bass: 4-String, 5-String<\/li>\n
- Ukulele, Violin, Cello, Mandolin, Banjo<\/li>\n<\/ul>\n
When a preset is active, the note selector shows only the relevant notes, and the current instrument name appears under the app title for quick reference. Tap the close button to return to full chromatic mode at any time.<\/p>\n
Custom Presets<\/h3>\n
Build your own note sets and save them as named presets alongside the built-in library. Tap the +<\/strong> button in the Custom Presets section of the Instruments panel to create a new preset \u2014 pick any notes from C1 to B7, give it a name, and save.<\/p>\n
Swipe left on any custom preset to Edit<\/strong> or Delete<\/strong> it. Swipe right to Duplicate<\/strong> it. Use the reorder button at the top of the section to drag presets into your preferred order.<\/p>\n
Free tier supports up to 2 custom presets. An active subscription removes this limit.<\/p>\n
\nTuning Temperament<\/h2>\n
Equal temperament is the standard tuning system used on modern keyboards and fretted instruments \u2014 but it is a mathematical compromise. Many acoustic instruments, and especially handpans, can be tuned to historically accurate systems that produce purer, more resonant intervals.<\/p>\n
When an instrument preset is active, OverTune lets you switch the reference system used for cent deviation calculations. Choose from four options in Settings:<\/p>\n
- \n
- Equal (12-TET)<\/strong> \u2014 The default. All semitones are equal. Cent readings match what every standard tuner shows.<\/li>\n
- Just Intonation<\/strong> \u2014 Based on pure integer frequency ratios (3:2 perfect fifth, 5:4 major third, etc.). The most natural-sounding system for a single key. Perfect for handpan builders targeting pure harmonic relationships between the Doum, Tak, and compound fifth.<\/li>\n
- Pythagorean<\/strong> \u2014 Derived from a chain of pure 3:2 fifths. Produces perfectly resonant fifths at the expense of slightly wider major thirds. Used in early music and plainchant traditions.<\/li>\n
- Meantone (\u00bc-comma)<\/strong> \u2014 Narrows each fifth slightly to produce pure 5:4 major thirds. The preferred tuning system for Renaissance and Baroque keyboard music.<\/li>\n
- Custom<\/strong> \u2014 Define your own cent offset for each of the 12 semitones from the root note. Adjust each interval independently in steps of 0.5 cents, from \u221250\u00a2 to +50\u00a2.<\/li>\n<\/ul>\n
All cent readings in every panel update instantly when you change temperament. The reference system is relative to the active preset’s root note \u2014 so D Just Intonation uses D as the 1:1 unison reference.<\/p>\n
In chromatic mode (no preset active), the picker is visible in Settings but disabled, and OverTune falls back to equal temperament.<\/p>\n
\nReference Tone Playback<\/h2>\n
Need to hear what perfect pitch sounds like? Each spectrum panel has a speaker button that plays a pure sine wave reference tone at the target frequency for that panel.<\/p>\n
Press and hold the speaker icon to hear the tone while your finger is down. For continuous playback, double-tap<\/strong> the icon to lock the tone on \u2014 the icon turns green to confirm. Double-tap again to stop. Selecting a different note stops all tones automatically. Each panel plays the correct frequency for its overtone \u2014 fundamental, octave, or compound fifth \u2014 so you can train your ear or use it as a drone reference while tuning.<\/p>\n
\nConfigurable Reference Pitch<\/h2>\n
Not every ensemble tunes to A4 = 440 Hz. OverTune lets you set your reference pitch anywhere from 400 Hz to 480 Hz<\/strong>, covering everything from baroque tuning (415 Hz) to modern orchestral pitch and beyond.<\/p>\n
All frequency calculations, note detection, and reference tones adjust automatically to your chosen reference.<\/p>\n
\nSharp and Flat Notation<\/h2>\n
Switch between sharp (\u266f) and flat (\u266d) notation with a single tap in Settings. All note names throughout the app update instantly \u2014 in the note selector, spectrum readouts, history graph labels, and instrument presets.<\/p>\n
When you select an instrument preset with a flat-oriented root note (like E\u266d, A\u266d, or B\u266d), the notation automatically switches to flats. Sharp-oriented roots (like C\u266f or F\u266f) switch to sharps.<\/p>\n
\nAppearance<\/h2>\n
OverTune adapts to your environment. Choose from:<\/p>\n
- \n
- System<\/strong> \u2014 Follows your device’s light or dark mode setting<\/li>\n
- Light<\/strong> \u2014 Always light background<\/li>\n
- Dark<\/strong> \u2014 Always dark background for low-light environments<\/li>\n<\/ul>\n
\nStartup Hints<\/h2>\n
First time using OverTune? A series of helpful hints walks you through every feature \u2014 from adjusting frequency ranges to using focus modes and instrument presets. Browse through them at your own pace, and access them again anytime from Settings.<\/p>\n
\nLandscape Orientation<\/h2>\n
Rotate your device sideways and OverTune adapts automatically. In landscape mode:<\/p>\n
- \n
- The three tuning panels sit side by side<\/strong>, each taking one third of the screen width<\/li>\n
- The note selector<\/strong> moves to a vertical sidebar on the right, with the instrument button at the top and the focus toggle at the bottom<\/li>\n
- Each panel’s readouts (detected note, frequency, and cents) shift to a compact row above the full-width needle gauge<\/strong>, maximising the space available for the spectrum and history graph<\/li>\n<\/ul>\n
Portrait and landscape layouts switch seamlessly as you rotate the device \u2014 no restart required.<\/p>\n
\nPanel Order<\/h2>\n
Prefer to see the Compound Fifth at the top, or the Octave first? Drag and drop the panels into any sequence in Settings \u2192 Panel Order<\/strong>. The order is saved between sessions.<\/p>\n
\nBuilt for iPhone and iPad<\/h2>\n
OverTune runs natively on both iPhone and iPad, in both portrait and landscape orientations. On iPad, the note selector and controls scale up for comfortable use on the larger screen. The same three-panel layout ensures a consistent experience across all your devices.<\/p>\n
\nNo Ads. No Tracking. Pure Tuning.<\/h2>\n
OverTune is built with zero third-party dependencies \u2014 no analytics SDKs, no ad frameworks, no tracking code. Just pure Apple frameworks for the fastest, most private tuning experience possible.<\/p>\n
\nPrivacy Policy<\/h2>\n
OverTune does not collect, store, or share any personal data. Ever.<\/strong><\/p>\n
Microphone Access<\/h3>\n
OverTune requires microphone access to analyze audio in real time. All audio processing happens entirely on your device \u2014 no recordings are made, no audio data is stored, and nothing is transmitted anywhere. The microphone is active only while the app is open and in the foreground, and is used exclusively for frequency analysis.<\/p>\n
Settings and Preferences<\/h3>\n
App settings \u2014 such as your reference pitch, notation preference, last selected note, instrument preset, and display options \u2014 are stored locally on your device using iOS standard storage (UserDefaults). This data never leaves your device and is not accessible to anyone other than you.<\/p>\n
Subscriptions<\/h3>\n
In-app subscription purchases are processed entirely by Apple through the App Store. OverTune has no access to your payment information, Apple ID, or any account details. All billing and subscription management is handled by Apple. Apple’s Privacy Policy<\/a> applies to all App Store transactions.<\/p>\n
Analytics and Tracking<\/h3>\n
OverTune contains no third-party analytics SDKs, advertising networks, or tracking code of any kind. App Store Connect provides Apple’s standard aggregate analytics \u2014 download counts, crash reports, and anonymised usage metrics \u2014 which are made available to the developer by Apple. No individual user data is collected or identifiable through these reports.<\/p>\n
Data Sharing<\/h3>\n
OverTune does not share any data with third parties. This is straightforward because no user data is collected in the first place.<\/p>\n
Children’s Privacy<\/h3>\n
OverTune does not knowingly collect any information from children under the age of 13 or any other user. The app has no accounts, no sign-in, and no data submission of any kind.<\/p>\n
Changes to This Policy<\/h3>\n
If OverTune’s privacy practices ever change, this page will be updated. Given the app’s architecture \u2014 no server, no accounts, no third-party SDKs \u2014 significant changes are unlikely.<\/p>\n
Contact<\/h3>\n
If you have any questions about this privacy policy or OverTune’s data practices, please contact: mishte.hp@gmail.com<\/a><\/p>\n
- The note selector<\/strong> moves to a vertical sidebar on the right, with the instrument button at the top and the focus toggle at the bottom<\/li>\n
- Light<\/strong> \u2014 Always light background<\/li>\n
- Just Intonation<\/strong> \u2014 Based on pure integer frequency ratios (3:2 perfect fifth, 5:4 major third, etc.). The most natural-sounding system for a single key. Perfect for handpan builders targeting pure harmonic relationships between the Doum, Tak, and compound fifth.<\/li>\n
- Equal (12-TET)<\/strong> \u2014 The default. All semitones are equal. Cent readings match what every standard tuner shows.<\/li>\n
- Modes<\/strong> \u2014 Dorian, Phrygian, Lydian, Mixolydian, Locrian, Whole Tone, Chromatic<\/li>\n
- Tight<\/strong> \u2014 Zooms in to just \u00b12 semitones from each target, giving you maximum resolution for fine-tuning<\/li>\n<\/ul>\n
- Right \u2192 Left<\/strong> \u2014 Same \u00b12 semitone range, time flowing in the opposite direction.<\/li>\n
- Sine Wave<\/strong> \u2014 Smooth curved bands for a softer, flowing appearance<\/li>\n
- Slow scroll<\/strong> \u2014 close to the target (within 5 cents), shown in green<\/li>\n
- A bright green zone<\/strong> at center marks the sweet spot: within 5 cents<\/strong> of perfect pitch<\/li>\n
- Octave<\/strong> \u2014 The second harmonic, one octave above<\/li>\n