Fossify Calendarβ β β β βBasic calendar app that works with your phoneβs local calendars. You can do all the usual things you want to use a calendar for on your phone. Doesnβt clutter up your schedule with ads or vacuum up your personal data.
Fossify Contactsβ β β β βBasic, privacy-respecting contacts app for Android that works with all contacts accounts on your phone.
Gearyβ β β β βReally lightweight but still modern, so itβs a good choice on lower-end hardware. Basic IMAP features, good for most day-to-day email use. Needs GNOME for setup.
Gmail (Android App)β β β ββWorks well with multiple accounts and display modes, but tracks you more than it should.
K-9 Emailβ β β β βClassic email app for Android: No frills, no ads, no tracking. Supports multiple accounts, phone-to-tablet layouts, and dark mode.
Microsoft Outlook (Android)β β β β βIt works. More stable than the desktop version. Handles mail, calendar and contacts, offers the focused/other inbox view. Tries to keep you in Microsoftβs apps. OK for work, wouldnβt use it for personal mail.
Nextcloud Calendarβ β β β β Self-hosted, web-based calendar that syncs easily with other apps and has completely replaced Google Calendar for me.
OpenTasksβ β β β β Simple to-do list that works great with a Nextcloud server or local storage on your phone.
Thunderbird (Email and Calendar)β β β β β Stable, capable desktop email application, works well with multiple accounts including Gmail, Nextcloud, easy to set up and use but with advanced settings when you need them. FLOSS.
Vivaldi (Web Browser)β β β β β Spiritual successor to the original Opera browser, this ultra-customizable web browser can open into a full suite for email, calendar, feeds and more β but only if you want it to.
Windows 10 Mail and Calendarβ β β ββNot a bad email client. Snappy, works with multiple accounts. Some issues with Nextcloud calendar and contacts. Of course itβs being discontinued.