Twangle privacy policy

Effective date: 8 November 2026 · Nederlands

Twangle is a guitar tuner for Android, with a metronome and practice tools, made by the developer Klaboukes. In short: Twangle collects no data about you. Nothing you play and nothing about you leaves your phone.

The microphone

• Twangle needs the microphone to hear the note you play. Android asks your permission first, and you can take it back at any time in the phone’s settings.
• The microphone is only on while the tuner screen is open. When you go to another screen, switch apps, lock the phone or turn the screen off, Twangle lets go of the microphone within about 5 seconds. Android’s microphone indicator shows when it is on.
• The strum check is part of the tuner screen: after you tap its button it listens with the tuner’s microphone in exactly the same way. So does the 12th-fret check. The chord name listens the same way in Chords, after you tap Listen. The trail, one of the meter’s looks, is only drawn on the screen and is gone when you leave it.
• Scales (and the drone you can play under a scale) and the Capo helper in the Practice tab never use the microphone, nor does Chords until you tap Listen, and neither do Ear training’s Intervals and Chord type exercises. Ear training’s Play it back uses it only while it is on the screen, to hear the note you play back, and lets go of it as the tuner does.
• On the metronome, the microphone is used only when you tap Listen, so Twangle can hear the music nearby and find its tempo. It listens for at most 15 seconds and stops sooner when you tap Stop, touch another control or leave the screen.
• The sound is analysed live, in the phone’s memory, to find the pitch or the tempo, and thrown away straight after. Twangle never records, saves or sends any sound.

On a watch

Twangle’s Wear OS watch app works on its own, without the phone. It follows the same rules: it hears through the watch’s own microphone only while its tuner is on the watch’s screen, analyses the sound in the watch’s memory and throws it away straight after, and never records, saves or sends any sound. Its metronome never uses the microphone. It has no internet permission either. It remembers only three things, on the watch itself: whether you said no to the microphone, so it knows whether to ask again; its metronome’s tempo and whether the metronome clicks through the watch’s speaker; and whether you turned its vibration guide on or off. All three stay out of Android’s backup.

No internet, no tracking

• Twangle has no internet permission, so it cannot send anything anywhere.
• No ads, no account or sign-up, no in-app purchases, no analytics, no crash reporting and no tracking of any kind.
• Twangle does not share data with anyone, because it has none to share.

Rating Twangle

• “Rate Twangle” in About opens Twangle’s page in the Google Play Store app.
• Once, at most, Twangle may also ask Google Play to show its own rating window: right after every string has been in tune, never on the first day you use Twangle. Google Play decides whether it really shows, and it may not show at all.
• That window is Google Play’s own, run by the Play Store app on your phone, not by Twangle. Twangle sends nothing to it and never learns whether it showed, or whether or how you rated. A rating or review you give goes to Google Play under your Google account, as when you rate on the Play Store page, and is public there; Google’s privacy policy covers it.

The website

Twangle’s website, klaboukes.github.io, where this policy is published too, collects nothing either: no cookies, no tracking or analytics, no forms, no scripts, and nothing loaded from another site (no web fonts, no embedded videos). Links to other sites, such as Google Play or the email address, only open when you tap them.

The website is hosted by GitHub (GitHub Pages). Like any web host, GitHub sees the internet address (IP address) of the device that opens a page, and keeps it for a while for security. Twangle’s developer gets no list of visitors and no statistics from it. How GitHub handles it is in GitHub’s privacy statement.

Settings stay on your phone

Twangle remembers the choices you make in the app, and nothing else. These are stored only on your phone:

• Tuning: the instrument and its tuning (and how far you lowered it), tunings you made yourself, whether Any note is on, the A4 reference pitch, how note names are written and how precise “in tune” is.
• Look: the meter (classic needle, light arc or strobe), whether words or cents show under the meter, light or dark mode, wallpaper colours, high contrast (once you have turned it on or off yourself; until then it follows the phone’s own contrast setting, which Twangle only looks at and keeps nothing of), and the app’s language if you picked one.
• While tuning: keep screen on, vibrate when in tune, the vibration guide (once you have turned it on or off yourself) and whether tuned strings are ticked off.
• Metronome: its tempo, meter, click sound, the clicks between the beats and whether it vibrates on the beat; the speed trainer’s start tempo, goal, step and number of bars per step, and whether it is on.
• Practice: the tool you used last; the chord or scale you looked at last; the drone’s sound, its notes and whether it plays an octave lower; the Capo helper’s key and fret; whether the chord charts and the scale neck are drawn left-handed; and the Ear training exercise you used last with what it asks (which notes, how many in a row and whether any octave counts; which intervals, and whether they are played up, down or together; which chord types), never your answers or a score.
• Whether you once said no to the microphone, so Twangle knows whether Android can still ask you.
• When you first opened Twangle, and whether Google Play’s rating window was asked for, so it comes at most once and never on the first day.

The home-screen widget shows the instrument and tuning you chose. It never uses the microphone.

If you have turned on Android’s own backup (for example Google backup), Android may include these settings in your phone’s backup or copy them to a new phone, so they come back after a reinstall. Only whether you said no to the microphone stays out of it: a new phone hasn’t asked you yet. That backup is run by Android and your backup provider, not by Twangle, and you control it in the phone’s settings. It never contains sound.

Vibration

Twangle can vibrate briefly when a string is in tune, in short taps while you tune with the vibration guide on (on by itself while a screen reader such as TalkBack is on: Twangle only looks whether one is on, and keeps nothing of it), and on the metronome’s beat if you turn that on; the watch taps your wrist when a note comes in tune, while you tune with its vibration guide on (the same way), and on every beat of its metronome. This needs Android’s vibrate permission, which is granted on install and gives no access to any data.

Children

Twangle collects no personal data from anyone, including children.

Changes

If this policy changes, the new version will be published here with a new effective date.

Contact

Questions? Contact the developer, Klaboukes, at twangle.tuner@proton.me.