I've tried (often installed & then uninstalled) many fishing related cellphone Apps but kept the following:
Fish Rules - It automatically downloads rule changes frequently and by default checks the rules in your gps location (State)
Tides Near Me - seems accurate and saves regularly used locations
Fishing Knots Lite
Is anyone satisfied with any apps I haven't mentioned that you use for surf fishing? Fishbrain (which includes social networking) looks interesting, but I just read in freshwater forums that it's creating a lot of spotburning.