Add a one-stop 'Hub' for all mail and calendars
My Proton products do not show up in the outdated mail app I use at the moment, Blackberry Hub for Android. Yet the concept is amazing - one inbox for all my mail and texts and messages, with a swipe-down access to the calendar. This enables me to turn almost all notifications off and simply check one master box to see notifications from Signal, work email, Teams, personal mail, social media, etc etc., and change views depending on whether I am at work or no. In addition, my calendars - work (MS Office), personal (Proton), and shared family (Apple atm) - can be integrated in one place. I understand that Proton is more secure and that Blackberry used to be the security masters...would love to have this feature back, and have not found anything as secure and no-fuss which Proton can integrate with.

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Tony commented
That s exactions true.
I use blackberry hub too and it s so wonderfull app but old non and without privacy like proton.
So dev thé same app but better and without the same blackberry keypad app (plus privant)