Don’t understand your negative reaction. The app encrypt mail with e2e.

You can use Delta Chat app with any email services.

I use Authy. It has Apple Watch app for quick access.

There is an standard client-server encryption in Telegram. If you want e2e encrypted chat, then use Secret chats. Almost all messengers nowadays use client server encryption. So the biggest problem is not man-in-the-middle attack, but physical access to device by someone and malware installed via breaches.

I use Authy. It has an Apple Watch app

Apple Book is simple and super neat. If you want you could turn off iCloud sync. I also use Bookmate because of reviews and comments from other users.