You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
I tracked the efficiency before and after my swap from Uberturbines/Pirellis to EV01+/PS4. Over the course of 8k miles, my average efficiency with the EV01/PS4 combo was 272 Wh/mile. Before I made the change it was at 293 Wh/mile.