If you are looking for the best VPN app for an android, then you can try SmartersVPN. This is one of the best VPN apps which have lots of features. It has a user-friendly interface so you can use it easily. It also uses the most advanced security systems, & TOP-CLASS PROTOCOLS. There are 100% NO-USAGE-LOGS POLICY, that means it would not be save user information or records. Data will be automatically removed. There are also have more features.

You can enjoy 5 simultaneous connections at a time.
There are using Military-Grade Encryption for the security.
It has no-logs policy.
IT only use trusted, open-source VPN protocols like openVPN, ikev2 and WireGuard.
24/7 LIVE SUPPORT
It provides UNBREAKABLE VPN SECURITY
It gives ADVANCED SPLIT TUNNELING.
You can switch one connection to another connection quickly. So in my opinion Smarters VPN is the best VPN