In general I like to have a passcode on the app since I would like to store all the sensitive data (such a meeting minutes, and not porn as suggested, not that it is any concern to you ChrisH) and such in one place. If I want to access that I would like it to be passcode protected. You're right when you say you secure the entire device with a passcode and thus secure the data. The thing is I access my phone dozens of times a day and I don't want to enter the passcode every single time, so It's setup with a pattern lock (which is not the most secure) and only locks every 30 minutes, for easy access, which is enough security for for general use of the phone. For the cloud data however I want to lock with a passcode every single time it is accessed, hence the request for a passcode. I agree this will not stop android savy persons who know how to access the data via file explorer apps, file encryption of the local files would make this a complete package.