Spark Mail: AI Email, Calendar — Old versions
Spark Mail AppNo older versions available yet. Current release.
What's new in 3.18.4
Spark now uses a more secure connection for Microsoft 365, Outlook, and Hotmail accounts, with one sign-in for email and calendar. Already use a Microsoft account? Just sign in again when Spark asks. It takes a few seconds. Share your feedback at support@sparkmailapp.com
Signing history
Android only installs an update signed by the same key as the version already on your device. This timeline shows every signing key we've seen for Spark Mail: AI Email, Calendar. One known signing key across every release we hold.
3.18.4
Current key1 release · Jul 29, 20264711 5d11 2054 5cf1…
Certificates on record (1)
Every key we have ever recorded for Spark Mail: AI Email, Calendar. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.
- 4711 5d11 2054 5cf1…Recorded the first time we scanned this package · Jul 29, 2026CN=Spark Android Team, O=Readdle Inc