Here is my product: https://matchkraft.com/. It is a marketing toolkit. I think you need to ask for feedback, asking why users don't want to pay for a premium subscription. So far, you are getting new users that is a good sign you are going to the right direction. Maybe, who is your ideal customer or maybe your product is ok but need more visibility (maybe paying ads). Try to get active users. I really want to... Source: 12 months ago

Calling a 3rd party API: There is a complete ecosystem providing "google-sheets-as-DB". I personally tested and recommend https://sheetson.com/ but there are a lot more with free tiers https://sheetsu.com/ https://sheety.co/. Source: about 2 years ago

Here is an amazing resource to build landing pages! Source: almost 3 years ago

The first thing we did was set up a landing page. This is one of the basic but essential things to do for your product. Whatever we put on social media as promotion, we'd link to this page. How the landing page was created is a story for my friend to tell, but the short answer is he followed advice from this site, and these are some key elements he made sure to include:. Source: almost 3 years ago