1. Upward navigation is possible on Android and web apps through an Up action (A)
2. Upward navigation is possible on iOS through the back button (B) in an iOS Navigation Bar

Buttons

Upward navigation means users can navigate one level upwards within a single app's hierarchy.

Arizona State University

"Reverse navigation refers to the backward movement between screens. It can move users chronologically through their recent screen history or upwards through an app's hierarchy."

Reverse Navigation

Reverse Navigation Examples

Upward Navigation 

Reverse chronological navigation means moving in reverse order through a "user's history of recently viewed screens."

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Related

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