Since it came with the hardware, apex fusion with the apex and fishbit that came with the RapidLED Coronas both track parameters in addition to controlling hardware. Both include reminders. Fishbit also has a section to add your fish, corals inverts etc.
I believe we'll see more adding tracking/logging features to apps that control the hardware as more hardware will be able to be controlled independently of neptunes apex line.
Keep that in mind if you are planning and hardware additions, especially lights and of course apex.