Realme is working on its own OS, revealed CEO Madhav Sheth. So far, the company has been using Oppo's Color OS for its phones, but that prevents it from delivering features that fans have been asking for. There are not details available about Realme OS. The platform should become available by the end of this year or early next year. It's not quite clear which (if any) of the existing Realme phones will be updated to the in-house software. The OS is believed to be based on Android Q, but Sheth did not confirm that. Will it be close to stock like Oxygen OS or heavily skinned like...
Source: https://www.gsmarena.com/realme_is_working_on_its_own_os_coming_by_the_end_of_the_year-news-38656.php