Since I had already found another full featured app locker that I really like, I didn't plan to use the simpler Avast one. Just out of curiosity I tried it on my new phone. I'm impressed so I'll be using it after all. I'll miss a fancy feature or two but Avast is already running so no additional notification icon or additional running program. It is simple but in a smart way, and I think most people would be happier with it. The vast majority, I suspect.
Youse Avast people really do good work.
A tiny bit of lint: The Avast app locker does not support a gesture password, but refers to a "pattern" as a "gesture". (Gesture passwords suck anyway. Just sayin'.)
See? That's the kind of person who is complementing you. So it's a big deal.