While doing work, I often get distracted on my phone. Is there any tweak that would allow me to block access to safari, other random apps on my phone for maybe 2 hour blocks or something? Or maybe that would prevent me from getting past the lock screen at all? I would still be able to answer phone calls, and even respond to texts from the lock screen, but I just wouldn't be able to get to my home screen. That would actually be perfect.