Follow the download instructions on your iPhone 7 or newer
Double tap and hold near the center of the screen for the app to start running (ensure you're on a sidewalk and holding it at stomach-level).
Practice walking left and right across a sidewalk in order to get a feel for the vibrations.
WHILE IN USE
Dull vibration means left, sharp means right.
The recommended direction is also displayed on screen.
A very strong vibration means you should turn immediately (within 1-2 steps), while no vibration means you should go straight.
TIPS AND TRICKS
Have your white cane at the ready; some obstacles may not be recognized by the app.
Only use the app when on a sidewalk; don't rely on it to cross a road or to navigate indoors.
Don't use it at night or in less than ideal conditions (i.e. construction, snow, rain, etc.)