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 have no affiliation with them but I've used getaround.com for a short term rental of a Tesla Roadster. Its a peer-to-peer rental service.
They have a Model S in SF for 25$/hour: Rent a Black Tesla Model S in San Francisco - Getaround