My favorite iPhone hunting app so far is IHuntJournal.

You can record your hunts, trophies, and research all in one place very easily. You can even attach pictures from your trail cam or actual harvest. If you phone supports GPS, then your actual position is automatically added.

I have been in touch with the designer and the next version is coming out in early November which will add a full journal feature.

Check it out. I like it because I can keep a record of my hunting activity quite easily. It also helped me get out of the woods after dark last night when I got turned around in a swamp. I used the app to show me my location and then used the compass on my iPhone to walk out!