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* [OSMAnd](https://osmand.net/) - Android/iOS Navigation app using OSM. It is a feature-rich app with all you expect.
## Mail Services
+ **AVOID**:
+* Google Mail
+
+ **Instead Use:**
+* [Posteo](https://posteo.de/en) - classic email with encrypted storage, including calendars, contact books and alias-addresses. Supports classic protocols like IMAP/SMTP, caldav and carddav
+* [Mailbox](https://mailbox.org) - similar to Posteo both in feature set as well as privacy, security and ethics
## Operating Systems
### Android