Polar has been discontinued. Similar apps include calibre, which is free and open source. Other options are Zotero, wallabag, TagSpaces and Instapaper. Note-taking Tools like Polar are a crowded field, with more than 50 alternatives for Mac, iPad, iPhone, Windows and the web.
Free e-book manager with features including library management, format conversion, syncing to devices, internet-independent operation, built-in viewer, news download as e-books, text-to-speech, privacy focus, extensible plugins, and no registration or tracking.
India
Zotero is a free, easy-to-use tool to help you collect, organize, share research and cite your research sources directly in your favourite word processor, with 300 MB free online storage.
United States
Open-source, self-hosted service that extracts article content for comfortable viewing, offers responsive offline access on multiple devices, supports import from popular tools, multilingual options, filters, classification, and downloads in many formats.
France
EU
Privacy-first, multi-device organizer for files and folders with customizable tags, color labels, note editing in markdown or HTML, Kanban boards, S3 object storage support, web page clipping, vendor lock-in free filename tagging, open source option, and multi-format preview.
GermanyEU
Save articles and web pages for offline access, organize content into folders, highlight text, use text-to-speech and speed reading, and sync and read on web or mobile. Provides clean reading view, integration options, sharing features, and device-friendly access.
United States
A reading app that keeps you in the flow of your online reading & research. Save, annotate, share & collaborate without leaving your tab.
United States
The Kindle app puts millions of books, magazines, newspapers, comics, and manga at your fingertips.
United States
Mendeley helps manage and share academic knowledge: Mendeley Desktop is free academic software (Windows, Mac, Linux) for organizing and sharing research papers and generating bibliographies with 1GB of free online storage to automatically back up and synchronize your library...
NetherlandsEU
Lightning fast with a slick design, Kavita is a rocket-fueled self-hosted digital library which supports a vast array of file formats. Install to start reading and share your server with your friends. book reader, self hosted, manga, comics, free, manhwa, e readers, electronic...
Noteful is your one-stop note-taking app to experience the new paperless revolution on iPad.
United Kingdom
End-to-encrypted, laser-focussed yet elegant editor. No registration, no login, no ads, no tracking, no hassle. Just write. In private or together with others.
MyInfo is a personal information manager for Windows. It will help you capture, organize, edit and share ideas, documents, tasks, and web pages.
BulgariaEU
