Centerline is a chromatic tuner that identifies the played note, shows whether it is flat or sharp, and indicates where the pitch settles. Chromatic mode covers 62–800 Hz and follows the nearest note, including sharps and flats. Players can choose Simple, Trail, Strobe, or Workbench views; Trail displays six seconds of pitch history. Guitar mode offers automatic string detection or direct string selection, along with standard tuning, All Strings progress, and a headstock view. Tuning works offline, and pitch analysis happens on the device. The app does not record, save, transmit, or share microphone audio. The free Chromatic plan includes chromatic tuning and guitar views. Centerline Complete is a one-time purchase for 3.99 USD per once, adding alternate and custom six-string tunings, capo settings, A4 calibration from 432–446 Hz, and reference tones. It is available for Android, iPhone, and Mac. All Strings remembers readings for individual strings but does not measure a chord at once; chromatic mode also does not cover the full piano range or a bass guitar’s lowest notes.
Who it is for
Centerline suits players who want an offline tuner with distinct pitch displays and guitar string guidance. Its stated range limits matter for full-range piano or the lowest notes of a bass guitar.
What is good
- Tuning works offline
- Four chromatic display views, including Strobe
- Guitar mode detects or lets users select strings
- Microphone audio is not recorded or transmitted
- Free plan includes chromatic tuning and guitar views
What to know first
- All Strings does not measure a chord at once
- Chromatic mode misses the full piano range
- Chromatic mode misses a bass guitar’s lowest notes
Verdict
Centerline offers several ways to read pitch, with guitar-focused guidance and offline use. Check its range limits and the one-time unlock’s added features against your tuning needs.
Centerline plans and pricing
All plansCompared on musical tuner apps
- Free plan
- Yes
- Strobe display
- Yes
- Alternate tunings
- Yes
- Custom reference pitch
- Yes
- Intonation monitoring
- Yes
- Offline mode
- Yes
- Available platforms
- both
