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: about 1 year 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

— Filters for the incoming emails Alternatives: About a year ago, I found out, that the guys from https://mailbrew.com/ have an essentially identical product, which I used for a few months myself. The product is quite nice, but for my personal usage it did not work very well. I disliked the reading experience, the email formatting was broken for Outlook on Android for a while and forwarded emails did not look nice... - Source: Hacker News / about 1 year ago

I looked at this a few months ago and ended up using mailbrew.com. It's free. Source: over 1 year ago

Https://mailbrew.com/ has helped me since instead of browsing reddit for hours and hours... It kind of just gives me the top three of things I'm interested in (like this post). Source: over 1 year ago

Https://mailbrew.com/ Not a Mac specific app, but a webapp for taming inbox overload You can create your own newsletter from favorite sources. Source: over 1 year ago

What is the font Mailbrew uses in their website headings? Thank you). Source: about 2 years ago