MichkaMC

MichkaMC (Michka Mail and Chat) is a privacy-first client for Android, Windows and Linux that puts your email, private messaging, calendar, to-dos and contacts in one app, with everything encrypted at rest and locked behind a hardware-backed PIN. Chat is fully end-to-end encrypted with the Signal Protocol and routes through a zero-knowledge relay you can self-host, so no server ever sees your messages or holds a private key. Email supports multi-account IMAP, POP3 and SMTP with OAuth2 sign-in for Gmail and Outlook, real autodiscovery, and tracking-pixel blocking by default. A built-in encrypted Vault keeps your passwords and other private information locked away in the same app.