Hi. I found the following problem in navigator free on android.
When "Warn at 1000m" is unchecked and at 500 and 100 meters are checked (in settings/camera tab) a camera sound warning is still delivered three times at 1000/500/100 meters. Only after removing scout_100.wav (used for 1000m) file the warning at 1000 meters is omitted.
By the way the warning files names are confusing, scout_1000.wav is used for 100m warning and scout_100.wav is for 1000m warning.