If you want a service to read newsletters in a distraction-free environment, LaterOn is worth a look. This AI-powered newsletter aggregator and scheduler has an ad-free reader interface and a Zen Mode for reading without interruptions. It also can summarize long newsletters with AI technology and send you summaries of newsletters at scheduled times by email so your inbox stays organized and uncluttered.
Another possibility is Focus Bear, which is geared to help people with ADHD and Autism work in a distraction-free environment. It's got tools to block websites and apps, a guided morning routine and customizable focus modes. It's designed to help you work better and achieve a better work-life balance, but its ability to block distractions and present a calm reading environment is useful for anyone.
If you need a writing-focused environment, Strut offers a collaborative environment with deep focus modes to help you write and manage projects. It's got a writing inbox to capture notes and ideas and an AI collaborator for brainstorming and outlining. It's designed to keep distractions away so you can have a smooth writing workflow, which can be useful if you need a quiet environment to read and respond to newsletters.