Centerline: Chromatic Tuner
Guitar, ukulele, violin, viola
About
This app offers free chromatic tuning for various instruments, identifying notes, sharps, and flats. It includes a dedicated guitar mode with automatic string detection and optional advanced tuning tools for purchase.
What's New in Centerline
1.8.1
October 11, 2026
New in 1.8.1: • VoiceOver on iOS 27 reads locked menu items in full again: locked tunings, Capo, reference tones and the A4 reference say they are locked and open the purchase screen. From 1.8.0: • Plucking a string again while it still rings no longer flashes HOLDING. • Chromatic says which way to go: Flat · tune up, Sharp · tune down. Guitar keeps tighten and loosen. • A locked string shows a lock pin, and a string you tuned earlier shows a check. • All strings counts how many strings you have checked in tune. • The microphone screen says it will reconnect on its own only when it will, after an interruption.
MoreSubscriptions & In-App Purchases
$3.99
Centerline Complete
Alt/custom tunings, capo, A4 and reference tones.
Developer apps
FAQ
Does Centerline have ads?
No, Centerline is ad-free. The app is designed with privacy in mind and does not contain advertisements.
What instruments can Centerline tune?
Centerline can tune guitar, ukulele, violin, viola, mandolin, and banjo in standard tuning. It also supports most voices and band instruments at their concert tuning note.
What are the optional tuning tools in Centerline Complete?
Centerline Complete offers Drop D, Half step down, D standard, DADGAD, Open G tunings, capo settings, A4 calibration from 432 to 446 Hz, and reference tones for a one-time purchase.
Can Centerline tune chords?
No, Centerline tunes one note or string at a time. It remembers individual readings but does not measure chords simultaneously.
Is Centerline available on Android devices?
Based on the provided data, Centerline is supported on Mac and iPhone. Information regarding Android availability is not present.
How often is Centerline updated?
The latest version of Centerline is 1.8.1, last updated on October 11, 2026. This indicates a relatively frequent update cycle.
What is the price of Centerline Complete?
Centerline Complete is a one-time purchase, and the store will show your local price. There is no subscription required for these extra tuning tools.
Does Centerline work offline?
Yes, Centerline works offline. Pitch analysis happens on your device, and it does not require an internet connection for tuning.
