: Users have reported that locked app content can sometimes flash for a split second before the lock screen appears. A deep system integration as part of a "Smart Profile" could ensure the app process is suspended or "blanked out" before it even comes to the foreground.
: Users often find constant prompts annoying. Context-aware locking ensures security only when it's actually needed. Easy App Locker 1.2
To give you a baseline, the current version by Moneyplant Technologies includes: Easy App Locker - App Store : Users have reported that locked app content