ProximityAlert is a simple app, which alerts you upon arriving a specified location. While traveling you can use this in various cases, for example - If you are planning to nap. - If you want to be alerted at a point of interest when touring a city or the countryside.- If you are occupied with reading, listening to music or other tasks, which take your full attention. - If there are places you should or do not want to be close to.Notice ProximityAlert runs only on the iPhone 3GS or later. It requires iOS 4.3 or later.Continued use of GPS running in the background can dramatically decrease battery life. ProximityAlert