The Hum reading is now a true 0.01 Hz measurement: the app times the mains waveform across about a hundred cycles instead of rounding to a tenth. Stopping the tuner or the ultrasonic sweep no longer flashes a full-screen ad under your finger.

Thanks for the reviews and feedback!

Fixed the app closing on launch on Chromebooks and tablets that run phone apps through a compatibility layer. An earlier attempt at this fix did not reach the store — this build does.