The OnePlus Watch uses a three-chip combination solution - ST32 + Apollo 3 + Cypress. The ST chip has strong performance and is responsible for the interactive interface of the UI. The display is also processed by the ST chip, giving users a smooth system experience.
Another thing I’ve noticed in your comments is questions about why we chose to use the RTOS system instead of Wear OS. When making a decision like this, we always have to weigh the benefits with the challenges to come up with what we think will result in the best user experience.
So after weighing all of our options, we ended up choosing RTOS primarily because of the ability to better offer our users a longer battery life. It is no exaggeration to say that this is probably one of the smoothest smartwatches with long battery life available in the market today.