It's allowed because Play Store in-app billing is only required for digital goods & services fulfilled by the app, not physical goods & services fulfilled outsi

It's allowed because Play Store in-app billing is only required for digital goods & services fulfilled by the app, not physical goods & services fulfilled outside your device. Uber isn't selling you app functionality, they're selling you the physical service of transportation, so they're exempt. Quote from policy [1]: Developers offering products within another category of app downloaded on Google Play must use Google Play In-app Billing as the method of payment, except for the following cases: - Payment is solely for physical products - Payment is for digital content that may be consumed outside of the app itself (e.g. songs that can be played on other music players). [1] https://play.google.com/about/monetization-ads/payments/ https://play.google.com/about/monetization-ads/payments/