Using the app is the most convenient way to login into Protonmail. It is a secure email service that provides access to your email. Once you have created an account, you need to set up your password. To avoid a hacker, use a password that is at least thirty characters long. You should avoid using common words and use a complex combination of characters. You should also try to create a strong, unique username.
See also - https://techarticles.ca/how-can-you-...or-protonmail/