The application sends a call to the owner of the property if a hidden phone was shaked. It can be used in the shop / car as the siren against thiefs. That can be used on cheap phones. Just click "Listen" and leave it in a secluded place.
Samadjon is the creator of this application that is listed among the Tools category. The latest update of Signalling Siren was released on Dec 11, 2016 and the app has been set up by over 100 users. Users rated this application 2.3 on Google Play.
You can get the setup package of Signalling Siren free of charge and read users' reviews on Droid Informer. The app runs on Android 2.3 and higher. This download is completely secure.