Adjust PHP Website

We have a website called SEODiscover.com. After clicking on a tool it will ask you fill in a captcha. There is a small error on top we need fixed as well. But we want to add a feature where instead of the captcha, after x amount of tools accessed, it will ask to create an account instead of captcha. We have a backend with a field to input the number of times a user can access a tool before it makes them fill in a captcha. We want an additional field to do the same for making them create an account/login after x amount of times. Should be really a 20-30 minutes job for a strong PHP developer. We would like this done right away.