And what would you recommend adequate free mockup generators?

Question

User interface

Given:

1. Macbook Pro '13 (Retina)
   
2. Responsive website
   

What needs to be done: demonstration of this site on various Apple devices (taking into account adaptability, of course).
I would like something like this: https://marvelapp.com/ . On the first screen, the family of Apple devices. The only difference is that my style should be Customer Journey (like user interaction, not just device screens)
What is the main problem when using generators like mockuper , smartmockups and the like: they all spoil the quality of the uploaded image, which ultimately results in a beautiful picture with a shit-quality-mutilated-case-on-screen. And if you still need to cut it all off, then it just turns out trash.
You could download a PSD mockup of Apple devices and add it there, but I repeat, you need it in the Customer Journey style .
Can anyone advise?

Answer 1

smartmockups.com/category/all

Answer 2

as if invision
and integration with the sketch were added, and it’s immediately possible for developers, and there is interactive (you can even in the sketch right away)
But adaptability can only be shown with different pictures