Having an app lock can be useful. It’s good for security and it’ll keep people out of your business. However, like most security concerns, having an applock isn’t always necessary. In fact, in most situations, you probably don’t actually need one.
the problem is Samsung will never provide s secure to flagships....it's strategy of Samsung....they prepared secure folder empowered by knox security in flagships, A Series ,and s secure to mid range, both inside few j series........but for flagships i recommend you to download those apps inside secure folder only which you want to lock
