From Zed Said Studio:
Retemodo is a reverse odometer. Set your desired distance and it counts down until you have reached it! Perfect for alerting you when you are approaching an important freeway exit, knowing when you have biked 10 miles or when jogging, allowing you to do "Out and Back" runs of specific distances. Features: - Works in the background, leave the app and let Retemodo alert you when you reach your distance. - Metric or Imperial - Audible and text alert when distance is reached. - Notification Center alerts. Extra: - There is also an Odometer view included in Retemodo. Just swipe across the screen to flip and see a standard Odometer. Swip to flip back to Retemodo! Note: Using Retemodo inside a building will not work very well as it is hard to get a GPS fix. Please use outside or in a car. Continued use of GPS running in the background can dramatically decrease battery life.