Sheetsu might be a bit more popular than Holiday API. We know about 2 links to it since March 2021 and only 2 links to Holiday API. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If I were to go about this I'd use something like this Holiday API that would do a lot of the handling for me. Source: over 1 year ago
We’ll be using the Holiday API, so go to holidayapi.com and sign up for a free API key. - Source: dev.to / over 2 years ago
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: 10 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
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
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Sheet 2 Site - Generate a website from 📗 Google Sheets
DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
SheetBest - Turn a Google SpreadSheet into a JSON Database API