Why does BlindSquare keep talking at me when I switch to other apps?

BlindSquare can run in the background so it can be used together with other GPS-apps like TomTom, Navigon, and Apple Maps. This lets you use these apps to hear turn-by-turn instructions and BlindSquare’s description of your environment at the same time.
If you would like to interrupt BlindSquare announcements, double-tap anywhere on the screen with two fingers while it is speaking.

You can also double-tap the Sleep Mode button at the bottom right of the screen. This will turn off BlindSquare until you double-tap the Sleep Mode button again. If you send BlindSquare to the background by pressing the Home button or locking the screen while Sleep Mode is turned on, BlindSquare will wake up again as soon as you return to BlindSquare or unlock the screen. Switching on Sleep Mode when you are not using BlindSquare can help to reduce battery consumption and data usage.

BlindSquare can recognize when your location does not change and if running in the background or your device’s screen is locked, will send BlindSquare into Sleep Mode after a specified period of time ranging from five to 90 minutes. You can go to Other, Settings, Automatic Sleep Time and adjust this option to your liking.