Closed. This question is not about programming or software development. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack Exchange site, you can leave a comment to explain where the question may be able to be answered. Closed 1 hour ago. Improve this question I'm working on a subdomain for my main website, which is dedicated to mechanical engineering. In this subdomain, I want users to unlock access to various mechanical engineering calculations. Users can view the calculation content, but they won't be able to input values until they pay for access. Here’s what I need: A login and registration system, where users can create accounts and log in to access the paid calculations. Payment integration, allowing users to pay to unlock calculation features. After payment, users should have ongoing access to calculations without needing to pay again for the same ones. I'm using WordPress for my main site, but I don't have a strong coding background. I've been learning from YouTube and prefer easy-to-implement solutions. What tools, plugins, or approaches would be best for building this on my subdomain? Any guidance is appreciated! Thanks! So far, I’ve only created a basic subdomain and added a few pages for calculations. I was expecting to find a simple plugin or tool that could handle login, payment integration, and content restriction, but I haven’t been able to figure it out on my own. I tried searching for tutorials but couldn’t find a clear solution for my specific needs.