Has one button. Hold it down to play an MLG Air Horn. Use the sliders to customize your horn's pitch and duration, even while it's playing.
Tap it a couple times then hold it down for a "Byer-byer-byer-byerrm" effect!
Not ad supported. Not collecting any data, outside of local statistics for your enjoyment. The new "AR Horn" mode places a 3D airhorn into your environment!
Apple Watch support adds a button for Byerrm right on your wrist, with a simple complication for ease of access.
2.4.1 corrects the slider direction. Moving up increases the pitch and rate, rather than decreases it. Credit to u/revision29 on Reddit for making me realize the app has always worked the opposite way it should have.
If you prefer the old sliding behavior, a setting has appeared under the stats to reverse them.