W3C mobileOK Checker
If you want to verify that your website is adapted to the mobile version then you definitely need the W3C mobileOK Checker!
It is very important to check the mobile-friendliness because the mobile environment significantly differs from the web one.
Everything in the mobile world is smaller - starting with a screen and ending with a memory.
The W3C mobileOK Checker is a really useful instrument for improving the quality of the software.