This is an app to help you practise timings for the ISSF series of matches. The free version allows you to practise for the Standard match. An in app purchase will activate timings for Rapid and Centrefire / Sport, and also simulated electronic targets as well as paper targets.
There are two modes in which you can use ISSF Shot Timer. You can turn the suggested timings on, so you can get used to the correct pace, or turn them off to see if your timings are correct. If you choose the first option, you can change the time to first shot, and the time after the last shot in the Settings. At the appropriate time the app will make a shot sound. On an iPhone the sound can be changed to a vibration.