You can use iWalkStraight in two ways.
Hold in hand
“hold in hand”. Run iWalkStraight and hold your iPhone in one hand. When you tap twice anywhere on the screen, iWalkStraight starts monitoring your direction. If you rotate too much towards right, iWalkStraight tells you to rotate on the left (reads “left”). Analogously, if you rotate too much on the left, iWalkStraight reads “right”. Pay attention: iWalkStraight only knows how where your iPhone is pointing. Hence it is important that the hand holding the iPhone moves together with your body. For example, we suggest to keep your hand on your belly. When you want iWalkStraight to stop talking, tap twice anywhere on the screen.
Hold in your pocket
Run iWalkStraight and put your iPhone (without locking it) in your pants pocket. When you get to a point where you need to walk straight, hit your pocket. You will hear iWalkStraight telling you “OK”. From now on, iWalkStraight checks that you walk straight and will suggest you to turn right or left. When you reach your destination, hit your pocket again and iWalkStraight will stop talking.
In the option menu (that can be found in your iPhone “Settings” app), you can set the following preferences.