GoKawiilDeveloper builds unofficial Quick Share support for jailbroken Kindles
Developer unrealJune has released Kindshare, an open-source tool that lets jailbroken Kindle devices receive files via Google's Quick Share from Android phones. The setup requires a Kindle capable of being jailbroken, installation of KOReader, and manual configuration through GitHub instructions, with full compatibility confirmed only on a Kindle Voyage running firmware 5.13.6. The tool currently only supports receiving files, not sending them from the Kindle.