Otohits has a unique engine. Created by peoples who know autosurfs and what is essential:

Clear UI, to be able to connect and surf as fast as possible.
An engine working 24/24h - 7/7d whatever the number of connected users.
A quick validation of your websites, a pleasant surf and a constant watching to delete blocking websites.
Otohits is totally free! You can enjoy all the options without paying anything.
Adult content is authorized (separated category).
You can hide the referer of your websites and override it too (available for websites that run on the application).
You can change the user-agent of the visits you receive (available for websites that run on the application).