If you added a mobile Contact app, or at least the ability to sync-back-and-forth from ProtonMail, your user base would increase dramatically. Coming from a paid (Plus) user, considering (Professional), I can't pull the trigger yet. My wife would hate the contact non-mgmt.
Currently, all your users are the die-hard "privacy or death" users who can survive the inconvenience of contact non-mgmt. If you added a contact app, you would get the multitudes of "privacy preferred" users.
There's tons more of those privacy-preferred peeps out there who can't live without a contact app.
Anonymous
If you added a mobile Contact app, or at least the ability to sync-back-and-forth from ProtonMail, your user base would increase dramatically. Coming from a paid (Plus) user, considering (Professional), I can't pull the trigger yet. My wife would hate the contact non-mgmt.
Currently, all your users are the die-hard "privacy or death" users who can survive the inconvenience of contact non-mgmt. If you added a contact app, you would get the multitudes of "privacy preferred" users.
There's tons more of those privacy-preferred peeps out there who can't live without a contact app.