I use GA on my landing page and Amplitude inside the product. GA is good at tracking traffic sources, and that's all I need. Plus, there are tons of materials

I use GA on my landing page and Amplitude inside the product. GA is good at tracking traffic sources, and that's all I need. Plus, there are tons of materials on GA out there, so even a noob like me can install and use it. What I like about Amplitude is that it's event-based. You can analyze users' behavior with it.