Native engine
Hears what you play
Two pitch-detection algorithms — YIN and MPM — fused at 44.1 kHz. Median filtering and hysteresis keep the reading steady instead of chasing room noise.
Precision tuner · iOS & Android
Every note.
Dead in tune.
Symphony is a studio-grade instrument tuner for the instruments you actually play. A native pitch engine, 31 hand-calibrated instruments and a detailed map of every string — so you know exactly what to turn.
Free to start No account needed Works offline
Coming soon on Google PlayComing soon on the App Store
Symphony Tuner · dark mode
31
calibrated instruments
orchestral, folk & modern
±0.5
cent stable precision
median + hysteresis smoothing
20
updates per second
native 44.1 kHz engine
44
languages
automatic region detection
Why Symphony
A tuner that respects
your ear.
Most tuner apps give you a needle and hope for the best. Symphony shows you the note, the string, the cents and the exact direction to turn — with an engine that stays steady when the room doesn't.
31 maps
Maps, not guesswork
Every instrument has a hand-positioned 2D map of its strings, keys or valves. Tap a note to hear it, then follow the needle to the right peg.
Full range
Chromatic, for everything
Identify any note across the full spectrum — voice, brass, an 88-key piano in for service. A live session graph tracks your cents deviation over time.
415–466 Hz
Calibration that goes deep
Set A4 anywhere from 415 to 466 Hz, choose a 2, 5 or 10-cent tolerance, and gate out background noise. Match the ensemble, the hall or the period instrument.
Stage ready
Built for the stage
High-contrast stage mode, a light haptic cue when you lock in, and a screen that stays awake while you play. Tune in the dark without squinting.
On-device
Private by default
Audio is analysed on your device and never recorded or uploaded. No sign-up, no cloud account, no audio leaving your phone — just you and the note.
Under the hoodYIN + MPM44.1 kHz4,096-sample window20 updates/secMedian + hysteresis
The library
From concert hall
to campfire.
31 instruments, each with its own tuning map and alternate tunings. Orchestral strings, brass and winds — plus the Latin American instruments most tuners forget.
Strings
Classical Guitar
EADGBE · Nylon
Strings
Violin
GDAE · Fifths
Keys
Piano
88 keys · A0–C8
Brass
Bb Trumpet
Main tuning slide
Strings
Cello
CGDA · Fifths
Strings
Ukulele
GCEA · Soprano
Winds
Alto Sax
Eb · Neck cork
Folk
Harp
27 strings · C3–A6
Folk
Charango
GCEAE · 10 strings
Folk
Mexican Guitarrón
A1–A2 · 6 strings
Percussion
Congas
Tumbadoras · Lugs
Strings
Banjo
CGDA · Tenor
See all 31 instrumentsExpandCollapse
Electric GuitarStrings
Acoustic GuitarStrings
Electric BassStrings
Double BassStrings
MandolinStrings
Bajo SextoFolk
BalalaikaFolk
CavaquinhoFolk
CuatroFolk
Colombian TipleFolk
Mexican VihuelaFolk
BagpipeFolk
Concert FluteWinds
Bb ClarinetWinds
OboeWinds
Tenor TromboneBrass
French HornBrass
TubaBrass
TimbalesPercussion
Plus every alternate tuning for each instrument — Drop D, DADGAD, open G, half-step down and more.
Inside the app
Designed for the stage.
Built for the practice room.
Three screens, zero clutter. Everything you need to get in tune and get on with the music — no menus to dig through while a string is drifting.
01 · Tune
See the note. On your instrument.
Pick your instrument and Symphony shows a map of its strings, keys or valves. Play a note and the closest string lights up, the needle moves, and the exact cents value tells you which way to turn.
- Tap any string to hear its reference tone
- Auto-detects the closest string as you play
- Green locks in; amber and red point the way
- Haptic confirmation when the note is true
Actual app screen · dark mode
02 · Choose
31 instruments. Two taps away.
From classical guitar to Colombian tiple, every instrument is calibrated and waiting in the library. Search by name, family or tuning; star the ones you play most and they stay on the home screen.
- Orchestral strings, brass, winds, keys and percussion
- Latin American folk instruments most tuners miss
- Alternate tunings included for every instrument
- Favorites and recents, always one tap away
03 · Explore
For every note in between.
Chromatic mode listens to any pitch, in any octave — a voice, a brass section, a piano you're servicing. The session graph shows how steadily you're holding the note, not just where it is right now.
- Full 12-note range across the musical spectrum
- Live history of cents deviation, 3–15 second window
- Dominant note, average cents and in-tune percentage
- Adjustable noise gate for loud rooms
Live pitch history
Chromatic
Real-time pitch, cents & session history
ACTUAL440.0 Hz
A4
Target 440.0 HzDEVIATION0 ct
✓ In Tune
SESSION HISTORY5s · >45 dB
0now
-5s-2.5sNow
DominantA4
Avg+0.4 ct
In tune96%
Peak-18 dB
CHROMATIC WHEELTap to lock
CC#DD#EFF#GG#AA#B
Three steps
From case to in tune.
01
Open and allow the mic
One permission, no account. Symphony starts listening straight away — nothing to configure before your first note.
02
Choose your instrument
Pick from 31 instruments or jump into chromatic mode. Every map and tuning is already calibrated and ready.
03
Play and follow the needle
Turn the peg toward green. The needle, the cents readout and a light haptic tap tell you the moment you're in tune.
Pricing
Simple pricing.
No subscription.
Free is genuinely useful. PRO is a one-time $4 unlock — about the price of a set of strings, paid once.
Symphony Free
Start tuning in under a minute.
$0/ forever
- 31-instrument library
- Standard tuning for every instrument
- Interactive 2D maps & reference tones
- Chromatic mode with session history
- Noise filter, haptics & stage mode
- A4 440 Hz reference
- Small banner ad on basic instruments
- Special instruments & alternate tunings via a short video
- A4 changes via a short video
No account. No credit card. No trial timer.
Symphony PROBest value
Everything, for the price of a coffee.
$4one time, USD
Local store pricing may vary. No subscription, ever.
- Everything in Free, without the ads
- All 31 instruments unlocked
- Every alternate tuning, including Drop D, DADGAD & open G
- A4 calibration from 415 to 466 Hz
- No banners, no video unlocks, anywhere
- One-time purchase with lifetime access
- Restore purchases on any device
Purchases are handled securely by the App Store or Google Play.
No account required Restore purchases anytime PRO is tied to your store account
FAQ
Good questions,
straight answers.
Everything you might want to know before you put a tuner on your music stand. Still curious? We answer every email.
Ask us anythingfirefulltank@gmail.comIs Symphony really free?
Yes. You can download Symphony and tune every instrument with its standard tuning for free. The free version shows a small banner ad on basic instruments, and a few special instruments, alternate tunings and A4 calibration options can be unlocked by watching a short video for the session.
What does PRO include, and what does it cost?
Symphony PRO is a one-time purchase of $4 USD (local pricing may vary by store). It removes every ad and unlocks all 31 instruments, all alternate tunings and the full A4 calibration range of 415–466 Hz. There is no subscription and no renewal.
Does it work offline?
Tuning is fully offline. Every instrument, tuning and map is bundled with the app, so you can tune in a basement, on a stage or in airplane mode. Only the optional store purchase and ads need an internet connection.
Is my microphone audio uploaded or recorded?
No. Pitch detection runs entirely on your device. Symphony does not record, store or upload audio, and there is no account or cloud service attached to your tuning data.
How accurate is the tuner?
The native engine (YIN + MPM at 44.1 kHz) reports stable precision of about ±0.5 cents, with median filtering and hysteresis to keep the needle from chasing noise. Real-world results depend on your device microphone, the instrument and the room, just like any tuner.
Which instruments are included?
31 instruments: classical, acoustic and electric guitar, electric and double bass, violin, cello, harp, ukulele, mandolin, banjo, charango, cuatro, guitarrón, tiple, vihuela, bajo sexto, balalaika, cavaquinho, piano, flute, clarinet, oboe, alto sax, trumpet, trombone, French horn, tuba, bagpipe, congas and timbales. Each one includes its own map and alternate tunings.
Do I need an account or an internet connection to tune?
No account, no sign-up and no internet connection required for tuning. Open the app, allow microphone access and play. The only permission Symphony asks for is the microphone.
Can I use it for a piano, voice or instrument setup?
Yes. Chromatic mode detects any note across the full spectrum, including all 88 keys of a piano and the human voice. It is also useful for checking intonation during setup or repair work.
When can I download it?
Symphony is finishing its store release for iPhone, iPad and Android. Join the waitlist and we will send a single email when it is live in your store — plus the direct link, so you do not have to search for it.
Launching soon
Be first in tune.
Symphony is coming to the App Store and Google Play. Leave your email and we'll send one message when it's live — no newsletter, no noise, no spam.
AndroidiPhone & iPad