Tuner
Stay in tune,
without leaving the song.
A precise, stable instrument tuner built right in. Real-time pitch detection through the microphone — note, octave, cents and frequency, all on one clear gauge. Tap the tuning-fork icon in the song view and start tuning.
The gauge
Note, cents and frequency — read it in a glance.
The tuner listens through your microphone and detects the pitch in real time. A responsive needle swings toward the target, and the display shows you exactly where you are: the note name and octave, how many cents you're sharp or flat, and the raw frequency in Hz.
The gauge is designed to be read from a distance — under stage light, mid-soundcheck. Green when you land it, orange when you're close, so you know the moment the string is right without squinting at a number.
It works for guitar, bass, ukulele, mandolin, brass, strings — anything with a clear fundamental. No mode-switching between instruments; the tuner just reads the pitch you play.
- Note name and octave
- Cents deviation — sharp or flat
- Live frequency in Hz
- Responsive needle that tracks the pitch
- Readable from a distance on a dark stage
- Works with any instrument that holds a note
The tuner runs on Strofa's own native audio engine (AVAudioEngine) with autocorrelation pitch detection — not a WebView or a delayed FFT. That means it reacts the instant you pluck a string, with the low latency you need to tune fast between songs.
Requires microphone access. The mic is used only for pitch detection, on-device — nothing is recorded or sent anywhere.
Playing with an orchestra tuned to 443, or an older instrument at 440? Set the reference pitch anywhere from 440 to 445 Hz and the whole tuner shifts to match — so you tune to the room, not the other way around.
Steady & adjustable
It locks onto the note — and holds it steady.
A cheap tuner jitters. Strofa's tuner locks onto the pitch and holds it steady with smoothing, so the reading settles instead of dancing around. You turn the peg, watch the needle come to rest, and you're done — no chasing a twitchy display.
The reference frequency is adjustable from 440 to 445 Hz. Standard concert pitch is 440, but orchestras often run a touch higher, and vintage instruments sit lower. Set the reference once and the tuner recalibrates every note to it.
Best of all, it lives inside the song view. Tap the tuning-fork icon in the header — no app switch, no leaving your chart. Tune, close it, and the count-in is right there waiting for you.
Because it shares the same audio engine as the metronome and backing-track player, Strofa hands the microphone over cleanly when you open the tuner and gives it back the moment you close it.
Get started
In tune in seconds. Then back to the song.
Free 7-day trial. No credit card required at sign-up.