How detailed graphics does the phone draw?

Question

Mobile development

Honestly, I don’t really understand phones, their components, which one is responsible for what, that’s why I turned.
I am creating a mobile game with low poly graphics, before that I surfed the Play Market in search of 3D games.
I am somewhat confused by the fact that the graphics in different games differ according to the principle "In this game, the character is 3 polygons, and in another game, the blade of grass is better detailed than in life." I do not find any intermediate options between such two games.
Well, to the point: there is a naked model without textures, what are its parameters to look at (I mean the number of polygons and the like, if judged by something else) in order to judge how it will load a mobile device?
And are there any articles on the net, for example, with tests of different mobile devices in different games?
Thanks in advance for the answers and I apologize if the question is stupid :D or if the question is not clear.

Answer 1

I can’t give an exact answer, but try to create a test application. Its essence is as follows: on the stage there is a frame counter and a polygon (or sphere) counter, and several spheres rotate, by tapping a few more spheres are added to the screen. Launch the application on your smartphone and tap until the fps drops to the minimum playable level. This way you will know how many polygons the maximum can be on the screen. Then finalize the project: everything is the same, but with different textures (first 10 different textures, then 20, etc.).

Answer 2

The most important parameter is responsiveness and on all declared phones. The engine has its limitations. So buy a frank guano for testing and watch the speed. It seems to be the most universal indicator. By the way, throw off the demo and it is desirable to drive the scenes interesting

Answer 3

Just today I read an opinion that any popular phone (not a modern top) for example iPhone 7 or Samsung s8 can be a reference point. For these phones, a frame with 200k triangles and 10-20MB of textures is considered normal.
This is with the condition that your CPU is unloaded, it does not eat much frame time.