The tuner pros use backstage, on your phone
You've tuned with the free web tuner. Savior Guitar Tuner: Pro is the strobe accurate, fully offline version a touring tech built for the stage.
One price. No subscription, no ads, no account. $7.99
Everything the free tuner can't do
0.1 cent accuracy
Most phone tuners round to a cent or two. The strobe engine tracks the phase of the note between readings, so you can see drift a needle would hide.
Four displays
Strobe (x1 to x8 bands), needle, cents readout, and a scrolling trail to watch a note settle.
Works completely offline
Basement rehearsal rooms, venues with no service, the van.
Tuned like a tech tunes
Per-string offsets for acoustic, electric, 12-string, and bass so chords ring true across the neck.
A4 calibration, 432 to 446 Hz
Adjust in 0.1 Hz steps, with reference tones that follow the calibration. Tap any string to tune by ear when the mic can't hear you.
Built for a dark stage
Large readout, six glowing color palettes, screen stays awake, haptic lock when a string lands.
Private by design
No network requests, no data collected, nothing recorded.
Modes: chromatic (any pitched instrument), standard, drop D, half step down, drop C, D standard, bass (4-string, low B), and ukulele (GCEA).
See it on stage
From a working tech
Savior Guitar is the repair and setup shop of Aron Robbins, a touring guitar tech trusted by the artists behind Bruno Mars, Maxwell, J. Cole, Justin Bieber, Mary J. Blige and D'Angelo. This is the tuner he built for the bench and the stage.
Free web tuner vs. Pro app
| Feature | Web tuner (free) | App (Pro) |
|---|---|---|
| Works offline | No | Yes |
| Strobe display | No | Yes |
| 0.1 cent accuracy | No, rounds to whole cents | Yes |
| Per-string offsets | No | Yes |
| A4 calibration | Fixed at 440 Hz | 432 to 446 Hz |
| Ads | None | None |
| Price | Free | $7.99 one time |
Frequently asked
Is there a free version?
Yes, the online tuners on this site are free. The app is a one-time purchase.
Is it a subscription?
No. Buy once, everything included.
Does it work without internet?
Yes, pitch detection runs entirely on the device.
Which tunings are included?
Chromatic, standard, drop D, half step down, drop C, D standard, bass, and ukulele. Chromatic mode covers any other tuning you need.
Does it tune bass and ukulele?
Yes, both have dedicated modes.
Is it on iPhone?
Not yet. iOS is in review. Enter your email on this page and we'll notify you the day it's approved.
Coming soon to iPhone
Get an email the day Savior Guitar Tuner: Pro is approved for iOS.
Ready for the stage?
Not ready? The online drop D tuner is always free.