It supports multi-track audio and customizable subtitles with adjustable font, color, and delay. Official Dolby Digital (AC3) and DTS support are included in premium versions.

The official version of OPlayer HD requires separate in-app purchases for several key features, such as: OPlayer - video player - App Store

OPlayer HD stands out for its extensive format support and networking capabilities, making it a "first choice for millions" of users over its 12-year history.