I decided to setup my old gmail and outlook email on my phone using K9-Mail app.
Since i don't want to login using a browser while setting up the accounts i decided to use the app passwords.
Everything works fine now but, in google documentation it says App passwords aren’t recommended and are unnecessary in most cases. To help keep your account secure, use "Sign in with Google" to connect apps to your Google Account.
Is app passwords are any way less secure? Is it fine to use as an authentication in mobile or the Sign in with Google option is better?