Yes, it’s totally legal to use the VPN as more than 95% of users use it all across the world. There are so many countries that legalized the use of VPN. Some of them are Iraq, Iran, Belarus, Turkey, and Oman. However, in some countries, it is legal to use the VPN, but most of the services are blocked and users are not able to connect it. But otherwise, you can use the VPN apps with your Android or any other devices freely without worrying about its legality.