Readia's answer
Readia focuss on "Retain what you read." A user can take an exam from his Kindle highlights and set a schedule for reviewing.
Based on our record, Tressel.xyz seems to be more popular. It has been mentiond 1 time since March 2021. 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.
Hey, Tressel does this (disclaimer - I created it) - there's a free version where you can comment publicly to save a post/comment or a premium version where you can save via your bookmarks. Source: almost 2 years ago
Readwise - Effortlessly rediscover and organize your Kindle highlights
Booky - Online bookmark manager. Store your favorite bookmarks online. Available everywhere. Private. Customizable. Fast.
Clippings.io - Organize the notes you make on your Kindle
Klib - Kindle & iBooks Highlights Manager
Wellput - Export your Kindle highlights into a personalized library
Notion API - Connect Notion to the tools you use every day