Question: Is there a tool that helps me retain information from my digital reading by sending me daily reminders of my highlights?

If you want a tool to help you remember what you read by sending you daily reminders of your highlights, Readwise is a great choice. The service helps you keep track of and use your digital highlights from sources like Kindle, Instapaper and iBooks. Readwise employs the scientific method of spaced repetition, sending you daily email reviews to help you remember better and better over time. It also lets you tag, annotate and search your highlights, and it integrates with tools like Evernote, Notion and Roam. Readwise offers a Lite and Full plan, including a 30-day free trial, so you can get started with organizing and reviewing your highlights.

Another interesting tool is Reflect, which uses AI smarts for features like voice note transcription, article summarization and grammar checking. Reflect lets you link notes with backlinks, import web clips and Kindle highlights, and work online or offline on mobile, desktop and web. It also integrates with other tools like Zapier, Readwise, Google and Outlook. Reflect costs $10 per month and offers a full-featured note-taking system with a networked note-taking approach and web clipper integration, so it's a good option if you want to organize and remember your reading material.

Glasp is a web-based and PDF highlighting tool that lets you collect and organize your favorite quotes and ideas from the web. It has features like AI-driven summarization, export to popular note-taking apps and import of Kindle highlights. Glasp also has a knowledge graph to track your learning journey and offers a free plan with unlimited public highlights, so it's a good service for researchers, students and lifelong learners. For $10/month, the Pro plan offers daily auto-sync and export to Notion, so it's a good option if you want to organize and review your highlights.