I use Hunting Calendar which I mainly use to get a reference of what they are thinking are better days for wildlife movement, which i believe is most likely based on moon stages.
Sunrise/Sunset so I have a better idea of legal shooting times (30 min after sunset).
ISnipe for estimating bullet drop (after properly sighting in of course).
Turkey Calls, and Ihunt calls for practicing with as we all know we can't use electronic turkey calls in Ontario.
I do have a first aid app and a couple survival apps that can help in case of emergency.
Ifish Ontario to help find more info on lakes/species around me.
A new website I found through twitter is ww w.whattohunt.com[/B] They made u... etc. I highly recommend people check it out.