[manmal]

Still, there‘s _usually_ no need to test an app on more than 1-2 physical devices. If it were a requirement to test an app on every device, then Android developers would be quite screwed.

Some exceptions exist, like medical apps or apps that rely a lot on continuous operation (I recently worked on an OBD app that allows drivers to gather their trip data, and it needed to continuously run in the background - you wouldn’t believe how hard Android manufacturers make this).

[a1o]

Medical apps are true high requirements yes - specially when interacting with other devices. But also games, depending on what you are doing, you definitely want to be testing on multiple devices, specifically if you are pushing the hardware in some way performance wise. When building game engines you will also be getting different reports with different qualities from other developers, and having real devices really speeds up reproducing issues.