Instapaper vs KeepR

Instapaper saves internet content for later reading and organization. A single action can save articles, videos, recipes, song lyrics, and other pages; saved articles and videos sync across supported devices and can be read offline. Readers can highlight and comment on article text, then store, retrieve, quote, and share selected passages. The free plan includes unlimited article, video, and page saves, folders, synchronization, and API integration, with a limit of five notes per month. Premium adds full-text search, a permanent archive of articles, PDF reading, unlimited notes, Kindle integration, and mobile AI Voices and text-to-speech playlists. Premium costs $5.99 a month or $59.99 a year. Supported platforms include the web, iOS, Android, macOS, and a Chrome extension; listed devices also include Kindle, Kobo, and Boox eReaders. Speed reading is listed as processing articles up to three times faster.

KeepR has no write-up on Specifiction yet; its figures are above.