For web apps I’ve always used Mechanical Turk and paid each user $10 vs. just a dollar or less. I made each tester download a screen record plug in for chrome, hit record and then go through all the steps in the test. Once finished they emailed me the recording.

The above is what you get from usertesting.com and other sites but pay up the nose($50 a test) vs. $10 or less dollars per test.

If it’s a downloadable app Just spin up a web UI/UX and have the turkers follow same steps but have them change the browser to say iPhone 6/7/8 view.