A big clean-up of the sound.

• Much cleaner audio — the app now takes the microphone signal raw, so there is far less background hiss
• Removed the faint engine-like roughness on speech, and the harshness and slight echo at higher volume
• Amplification no longer stops on its own after a brief earbud dropout
• Swiping the app away from Recents now fully stops it
• Never switches to the phone speaker if your earbuds disconnect
• Volume and noise sliders move in clean steps

• Sign in with your phone number to restore a purchase you made offline.
  You will receive a one-time code by SMS.

• You can now delete your account from within the app, under Settings.

• Clearer progress and error messages while signing in, so you always know
  what the app is doing.

• Improved handling of feedback (whistling) at high amplification levels.

• Various stability fixes.