K-9 Mail is an open source email client that works with basically every email provider. Features * supports multiple accounts * Unified Inbox * privacy-friendly (no tracking whatsoever, only connects to your email provider) * automatic background synchronization or push notifications * local and server-side search * OpenPGP email encryption (PGP/MIME) Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP. Support If you're having trouble with K-9 Mail, ask for help in our support forum at Want to help? K-9 Mail is now part of the Thunderbird family and remains a community developed project. If you're interested in helping to improve the app, please join us! You can find our bug tracker, source code, and wiki at We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.
What is K?
K is built to deliver a stable, responsive user experience on Android systems. Cataloged under Communication, it meets rigorous performance and resource-management benchmarks. Whether deployed for everyday productivity, communication, or gaming, version 24.0 brings verified optimization and regular security improvements.
Key Features & Capabilities
- Authentic Upstream Release: Direct, unbundled APK package matching original developer cryptographic signatures.
- Platform Optimized: Tailored specifically for Android (Android 8.0+).
- Optimized File Footprint: Package download size of approximately 85 MB, minimizing bandwidth and storage overhead.
- Antivirus & Integrity Verified: Scanned against 70+ top security engines with zero malware, adware, or unauthorized toolbars.
System Requirements & Installation Specs
To run K properly, ensure your device satisfies the minimum requirements: Operating system Android 8.0 Oreo or higher, minimum available storage space of 85 MB, and an active internet connection for online services and automatic mirrors.
How to Download & Install on Android
Downloading and configuring K is straightforward and secure via LoadPure CDN mirrors:
- Tap the direct Download APK button to save the verified package to your device.
- Open the downloaded package from your browser downloads or file manager.
- If prompted, allow "Install from this source" in your security settings, then tap Install.
