What are some alternatives?
When comparing SimPholders and Uber on Messenger, you can also consider the following products
IBM MobileFirst - IBM MobileFirst provides enterprise mobility solutions.
fastlane - Connect all iOS deployment tools into one streamlined workflow
Evothings - Evothings is a mobile application enabler for the Internet of Things (IoT) industry
Smart Ride - Order an Uber without a smartphone
B4X - Cross platform development tools for native iOS, Android, desktop and server applications.
Uber Chrome - Call an Uber from your Desktop