How to test the mobile interface?

Question

User interface

Made a prototype of the mobile interface in PS.
I wanted to test in the simplest way - run a screenshot on the device (Iphone). It turned out, somehow everything is small.
I went to the Internet and downloaded ready-made layouts to view the font sizes. Almost all layouts used the same font sizes and still looked better in testing.
What am I doing wrong and how to properly test the application?
Layout

Answer 1

This font, perhaps even on the desktop, looks small - due to the fact that the point of the letter is eaten up (the letters "e", "a" - everything sticks together.
Doesn't it have a thinner style?