Applock is not working properly. Review on AppLock

Hello friends, we need security for not only our devices but also for the data like pictures videos and other apps. So I downloaded applock from the playstore and installed in my smart phone. For the first time it worked good but sometimes it is not at all working. Even after adding the photos to the applock photo locker folder it is showing in the open gallery. It is not encrypting the data. And sometimes without the password also applock is able to open directing. I have tried many times to update the app and tried to save the pis and files but it is waste of time. I used this applock for apps like whatsapp and facebook but sometimes without lock I am able to access whatsapp. Then what is the use of using this app. It is better to use some other better applock softwares other than this.i am not recommending this app