Version Information
- Version
- 24.0
- Release date
- Oct 7, 2026
- Size
- 10.9 MB
- Android
- 6.0+
- File type
- APK
- Package
- com.fsck.k9
- Developer
- Mozilla Thunderbird
About K-9 Mail
K-9 Mail is an email client built for Android and developed by Mozilla Thunderbird, filed under the communication category. It gives you a dedicated place to handle your mail on a phone or tablet, and this listing covers version 24.0, a release dated 2026-10-07. What the app is for As a communication tool, K-9 Mail centers entirely on reading and sending electronic mail from a mobile device. It is offered by Mozilla Thunderbird, an organization long associated with desktop mail software, so the app follows that lineage with a focused, single-purpose design rather than a bundle of unrelated features. Compatibility and setup The build requires Android 6.0 or newer. If your handset runs a more recent release of the platform, it should fall within the supported range, while devices below that baseline will not be able to install it. Once installed, the app is identified by the package name com.fsck.k9, which is useful if you need to locate it in your device settings or check which build is present. Size and footprint The installation file measures 10.9 MB, keeping it modest compared with many modern applications. That small footprint leaves plenty of room for your messages, attachments, and account data without putting heavy demands on available storage. The content rating for this listing is unknown, so the listing gives no age guidance for families. Version details Version 24.0 is the build described here. Noting the version number is a simple way to confirm you are running the release documented in this listing, and the package name com.fsck.k9 ties the installed app back to this exact package record.