The biggest contribution you can make for HA Client is to take part in testing and leave your feedback or report bugs in a form of issue on [github](https://github.com/estevez-dev/ha_client/issues). Use [log viewer](/docs#log-viewer) to provide some logs.
To join beta testing you need to register for it on [Google Play](https://play.google.com/apps/testing/com.keyboardcrumbs.haclient) or just go to the app by [direct link](https://play.google.com/store/apps/details?id=com.keyboardcrumbs.haclient)