I use the ScoutLook app. It has a Log feature that allows you to take notes and it will automaticlly attach the date, time, current weather, moon phase, etc to the note forever. So next year on October 30th, i can go back and see if i saw deer or not and what the weather and moon phase was at that time. i think it's great for helping pattern deer and deer movement.

also, for the all the guys bashing using technology with hunting...here you sit on the interent, using an electronic device, trying to learn more about hunting. hmmmm