K-9 Mail
The facts below are what the maker publishes about K-9 Mail, checked and dated. Our editors have not written about it yet.
Plans and prices
From K-9 Mail's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| K-9 Mail | Free | Android email client · open source |
The facts
Each one read from K-9 Mail's own pages, with the date it was checked.
What it does
- Accounts
- The app supports multiple accounts and works with basically every email provider.checked 12 Oct 2026
- Audience
- The maker says K-9 Mail is designed for novice and power users.checked 12 Oct 2026
- Calendar tools
- Nochecked 24 Sep 2026
- Documentation
- The user manual page says the manual has been abandoned because the team lacks resources to keep it up to date; a historic version remains available.checked 12 Oct 2026
- Downloads
- The maker lists Google Play, F-Droid and direct APK downloads from GitHub as download channels.checked 12 Oct 2026
- Encryption
- K-9 Mail supports OpenPGP email encryption using PGP/MIME, and the listing says to install OpenKeychain to encrypt or decrypt email.checked 12 Oct 2026
- Inbox
- Features include a unified inbox and per-account notifications.checked 12 Oct 2026
- License
- K-9 Mail is licensed under Apache License, Version 2.0, and its source code is available on GitHub.checked 12 Oct 2026
- Local data
- The privacy notice says names, email messages and address books are stored and processed locally on the device and never sent to Mozilla.checked 12 Oct 2026
- OAuth
- The privacy notice says OAuth authentication and synchronization happen directly between the app and the provider over an encrypted connection, without Mozilla-operated services.checked 12 Oct 2026
- Other features
- The maker lists white and dark themes, signatures, message flagging, multiple identities, keyboard shortcuts and attachment saving.checked 12 Oct 2026
- Privacy
- The Google Play listing says the app shares no data with third parties and collects no data; it also says data is encrypted in transit.checked 12 Oct 2026
- Purpose
- K-9 Mail is an open source email client for Android with advanced features, designed to help users manage large volumes of email.checked 12 Oct 2026
- Search
- The app supports local and server-side email search.checked 12 Oct 2026
- Support
- The maker directs users with questions to its support forum and also lists Matrix and GitHub issue tracking for community interaction.checked 12 Oct 2026
- Synchronization
- The app supports automatic background synchronization or push notifications.checked 12 Oct 2026
- Unified inbox
- Yeschecked 24 Sep 2026
Where it runs
- App coverage
- mobilechecked 24 Sep 2026
Money
- Free plan
- Yeschecked 24 Sep 2026
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