We, Stabilios sistemos, developed an Android app to sync Standard ERP contact register with Android contacts. Contact Sync for Standard ERP app works via Rest API version 2 with OAuth authorization. Contact syncing works one way - from Standard ERP to Android, changes in the Android Contacts are not mirrored in the Standard ERP.
The solution does not require a HAL licence.

Anyone interested in this app don't hesitate to contact us info@stabilios-sistemos.lt