Suggestions for detecting if the mobile app has crashed?

I am app testing (currently android) and I’d like to know a good method of detecting if the app has crashed particularly at the last step. Say I’m on the last action which is tap a button I have no action next for try catch to pick up on how can I check is app has crashed after this? I supposed I could element exist if UI is still on screen or look for home screen features but that will take up a extra seconds which compounds if doing lots of tests. What are some best practices for detecting a crash?