Commercial pilots: What app are you using and what is your pre/post flight routine?

I recently started doing some flights for work and was looking for a good pre/post flight checklist routine that would keep me safe in case I am ever asked for logs by the FAA. I notice that the iOS app Kittyhawk is pretty good and probably would do what I need but wanted to get opinions from people that have been doing it longer.Thank you. via /r/drones https://ift.tt/31RfjSu