I just go fish mostly, I do know that moon phase, barometric pressure etc. play a part in the bite. Take this afternoon for example, I left work a little early and made a few stops and my local bank spots and absolutely slayed some fish. Didn't catch but a few keeper crappie but could not keep the bass, catfish and all the others off my minners. This was from 1pm until 5pm not even prime fishing hours. So I'm sure there is something to it, but is it going to keep me off the water or out of the woods? No sir.. I enjoy it too much and take the good with the bad. I do know a few that base there outings on these apps.. I'm just not one of them.