This $10 app lets snowboarders, skiers, and skateboarders measure their jumps. It identifies the exact length of time they were airborne and the exact GPS location where the jump took place. HangTimer also delivers snow reports, detects ski resorts, and maintains a list of your 10 best jumps.
Note: This link takes you to the vendor's site. From there, you can follow the link to the iTunes App Store, where you can download the latest version of the software.