I use rmapi-js (https://github.com/erikbrinkman/rmapi-js) to authenticate, which allows you to get a token you can use to send digests to the device

I use postmark because it's supposed to get emails in your inbox and because I already had an account on it. I'll see what I can do to not make it go in spam :P

Most of the complexity in the product is in:

- Scraping RSS feeds (have to use proxies to extract html and mirror all the images so that I can embed them in the digest)

- Generate PDFs of exactly the right format using Puppeteer (using cloudflare workers for this)