Flight Timer is an app designed specifically to monitor and track any in-flight timed operations. Use it as a regular timer or to track when to switch from your left to your right fuel tank with the fuel tank timer feature, Setup and monitor multiple approach legs for your Departure or Arrival airport. Time your inbound and outbound legs on your next Hold. Flight Timer has been designed with simplicity and ease of use in mind. It is a great tool to help with your flight planning.