on siren when out of preset map area

I have experience with development mobile applications with usage google maps api ==================

I have previously done a similar project, so I can complete this one efficiently as well. I have got experience in building several apps with google maps in android. I am sure that you will be satisfied with my work.

I am not active on this this site but i have good experience in android development i have about 5 applications on store now - mazika - ouihop - save my monster - soundwalkrs - prune

hay safety area : could be specified on map with any radius you want . What options to specify safety Area with its radius? A i can hard_code this area , but you cannot change it later ! B let user add this coordinates by himself if he does not know the where those coordinates should be on map and , plus radius . C let him choose this area from maps , plus radius(recommended) . i can add B and C . so user can choose Area from maps or add its coordinates if he does not know where coordinates should be in maps . siren : could be anything "any action you want " examples : - notification - Alarm sound - open an app - dial somebody what app should look like ? option A and B to specify safety Area + any Action you want if user go out this specified Area in a beautiful design ! plz contact me for further details ,if you want my service .