HTTP is used by almost all Android apps to request data, load content, and send changes to backend servers. If you can see and edit these requests & responses then you can understand, debug, and change how any app works, but Android makes this hard to do.
Do apps use HTTP or HTTPS?
HTTPS will now be the default for all Android Apps.
Do iPhone apps use HTTP?
App Transport Security, or ATS, is a feature that Apple debuted in iOS 9. … When ATS is enabled, it forces an app to connect to web services over an HTTPS connection rather than HTTP, which keeps user data secure while in transit by encrypting it.