Which VPN app is best for Android devices?

Here i am looking forward for the best vpn service of 2019 which works best for my android devices.
Here after research i found the guide of 4 best vpn service providers in detail comparision: Top 4 Best VPN Services of 2019 | Ultimate Anonymity and Freedom
Which one is best out of 4 VPNs?
Need suggestions for android devices
1. SurfShark
2. NordVPN
3. CyberGhost
4. ExpressVPN
or any other is best for android perspective?

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