History: JMAPdroid
Preview of version: 4
As of 2019-09, nothing happened on this because our focus is on https://dev.tiki.org/Cypht-integration
In the mean time, please see: https://github.com/iNPUTmice/lttrs-android
^
We are planning to create an Android app to sync your contacts and calendars via JMAP, and deployable via F-Droid.
Please join us!