Inspired by my ability to collect articles from HN that I wanted to read, but never getting around to reading them, I built Newslater. You add the articles you want to read to your reading list, and Newslater will email you a newsletter containing summaries of 5 of your articles sent at a time you choose. My aim was to create a tl;dr newsletter from articles you are actually interested in.The app is free, has no ads, and is available on Android and iOS:
https://play.google.com/store/apps/details?id=co.readlater.readlater
https://apps.apple.com/us/app/readlater-personal-newsletter/id6469415216
It’s a bit rough, but I thought some others may be interested in giving it a go. You can see examples of the newsletters it generates here too https://newslater.co/