The app is called "Occupied" and currently available in the Google Play store.
From the app's site:
The app gives real-time voice warning to those approaching an area where stone-throwing occurs or there are Molotov cocktails, or any other dangerous event as reported by other users. It is also possible to receive a warning when you enter the Palestinian Authority areas.
The app uses an aggregate of news reports to identify possible danger areas, and then outlines those areas on a color-coded map. The app looks like any other smart-phone map, and it also lists possible isolated incidents, along with the source of the news (if the source is available).
The website sites a few incidents involving innocent people who inadvertently got caught in a maelstrom of violence.
At the time of the posting of this article the app-creator had not yet responded to email.