A tuner and a metronome, built by a violinist for everyday practice: quick to read, no account, no ads, and nothing ever leaves your device.
Tuner
Chromatic for any instrument — strings, winds, plucked instruments, voice. Eight displays to swipe between: a classic needle, a fine scale, a digital readout with the cent deviation in large digits, a line that shows the shape of a note over time, and for children a car and a plane that stay on track when the note is right.
The tuning assistant guides you string by string: pick your instrument, each string gets its check mark, the app moves on by itself.
• Concert pitch from 415 to 446 Hz, set to 442 • Four temperaments: equal, pure fifths, meantone and Werckmeister III — each explained in plain language • Transposition for Bb, Eb and F instruments: the display shows the written pitch • Note names German (H, Fis), international (B, F#) or solfège (Fa#) • Precision adjustable from ±0 to ±5 cents • Reference tone at the touch of a button, as strings or oboe
Metronome
Sample-accurate rather than timer-driven — still in time after ten minutes. Tap the tempo, type it in, pick from the usual ones, or step by single beats. Accent on the one, one to four beats per bar, four sounds.
It keeps going when you switch to your sheet music or lock the screen. The tempo and a stop button stay on the lock screen.
Over AirPlay it plays through a room speaker or HomePod — useful in lessons and ensembles. The visual display follows the sound you actually hear, not the device.
For silent practice, switch to the visual display: the edge of the screen pulses in time. You can add taps as well — feel the beat instead of hearing it.
Rehearse together
Several devices in the same room can show the same beat. One opens the rehearsal, the others join — anyone may change it, and it applies to everyone at once. The connection runs over Bluetooth and direct Wi-Fi between the devices; no network is needed. Up to eight.
While the app is open, the others pulse along silently. Switch to your sheet music and the beat keeps going in sync, audible on every device then — the app compensates the difference in output latency and measures it acoustically on request.
On your home screen
Five widgets: the tempi, the reference tones, both together, a small metronome with −/+ and start, plus the lock screen display while it runs. A tap is enough, the app does not need to open. The tone widget can be set to your own instrument and sounds at your concert pitch. Plus Control Centre buttons that lead straight to the tuner or the metronome.
Portrait and landscape
On a music stand the device lies sideways. Both orientations are designed in their own right, not a rotated afterthought.
Privacy
The microphone listens only while the app is on screen. Nothing is recorded, nothing is sent, there is no account and no advertising. The app works without an internet connection.
More on learning the violin: fragherrnmaurer.com
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