Samsung continues to refine One UI Watch 4.5 ahead of the Galaxy Watch5 and Galaxy Watch5 Pro launch event on August 10. Based on Wear OS 3.5, One UI Watch 4.5 remains in beta, with Samsung having now released One UI Watch 4.5 Beta 5. The latest beta update, which could also be the final one before next month's Galaxy Unpacked event, is available to download now on the Galaxy Watch4 and Galaxy Watch4 Classic.