What tools effectively test UI for a responsive site?

Question

Automation

Hello!
The task is creative: there is a large adaptive application for desktop, tablets and mobile devices (the line of devices for testing is known, some of the devices are on hand). The pages are loaded, contain a lot of elements, breakpoints, etc., styles that affect the entire application change quite a lot from time to time (this is inevitable).
The question is: how can you effectively test such an application on as many devices as possible - you are more interested in the layout than the functionality, so that the respondent does not go anywhere and so on. Do not offer hands-on testing on devices, I'm looking for a more effective solution.

Answer 1

Solution found by myself - galenframework.com