Product facts
Centerline facts
Current product information from Endpaper Labs LLC
Centerline is a guitar tuner for musicians who want a clear, private way to tune.
Where Centerline works
Centerline is available on Android and iPhone.
Privacy and audio
No account is required. No ads are shown. Works offline. Audio is analyzed on your device in real time to detect pitch, then discarded.
Free core and optional extras
Standard tuning is free. An optional one-time unlock adds alternate tunings and A4 calibration. There is no subscription. Your store shows the local price before you buy.
Official downloads
Get Centerline on Google Play or download it from the App Store.
More details
Read the Centerline privacy policy for details about data handling.