The latest version of the app on android is 3.10.9-433. This page about Time-Based Control: https://www.tesla.com/support/energy/powerwall/mobile-app/time-based-control says the version required is "Tesla app Version 3.3.1 or higher and Gateway Firmware 1.14 or higher".
I don't have any iOS devices. Is there a workaround? Or am I missing something?