Uber uses a floater for showing ETA

Context

In ride-hailing apps like Uber, estimating the time it takes for a driver to reach the user is crucial for a smooth user experience.  

Knowing the ETA allows users to plan their pick-up location and wait time, reducing anxiety and ensuring a positive experience.

Why this works

A floater, a UI element that remains on top of other app content, is an effective way to display the ETA for several reasons:

• Visibility: Since the floater is always on top, the ETA remains constantly visible to the user, eliminating the need to navigate through different app screens.
• Clarity: The floater can be designed to be clear and concise, displaying only the essential information like the ETA and driver distance.
• Real-time updates: The ETA can be updated dynamically within the floater as traffic conditions or driver location change.