This is a companion app for the desktop app, so on it's own might seem a little limited but it is good at what it does, which is viewing your logbook and adding new jumps. There was some issues at first but the developer was very responsive to fix them. Would give it 5 stars if the app was a bit more intuitive to use and you could edit existing jumps.
Garbage. Stick to Skydiving Logbook App. Free, more intuitive, accurate and useful.