Can you use Pixton for free?

I'm curious, can you actually use Pixton for free or do you have to pay for it? I've heard some people say that there's a limited version available, but I'm not sure what that entails. Is there a catch, or is it truly free to use with no strings attached? I'd love to give it a try and see if it's a good fit for my needs, but I don't want to waste my time if I'm going to have to pay for it later on. Can you clarify the situation for me?