The merger between Adelaide's Hills Health Solutions and patient engagement vendor Lincor is officially off, with the business relationship between the two to revert to the previous distribution agreement.

US-headquartered Lincor, which was originally founded by former Apple executives in Ireland, and ASX-listed Hills Ltd first announced a plan to merge the health solutions businesses and list on the stock exchange in September last year, with the merged entity managed by Lincor's CEO Chris Cashwell and Hills' chair Jennifer Hill-Ling as a director.