OwnNotes is a private, offline AI notebook app for iPhone, iPad, and Mac that enables users to capture, summarize, rewrite, and transcribe notes entirely on-device without cloud storage or subscriptions. The app offers features like voice-to-text, AI summarization, brainstorming assistance, and biometric security, with a free ad-supported version and optional one-time purchase to remove ads.
Mereth Reader v0.1.4 is an open source PDF reader with annotation, notes, spaced repetition scheduling, and linking support. The release expands the reading-to-notes-to-review workflow with features like quick note capture with source links, cloze deletion review with separate schedules, PDF link following, and backup restoration. The database upgrades to schema 16 on first launch, and users should maintain independent backups before upgrading.
Margin is a macOS app designed to help students study technical PDF textbooks more effectively. It lets users add notes and explanations directly beside text, organize related notes into scratchpads by topic, and revisit their work through an interactive book map. The app saves locally without requiring subscriptions or accounts, works offline, and supports PDFs up to 2,000 pages on Apple silicon Macs running Sonoma or later.
Sticky is a dedicated magnetic family note device with an e-ink display for shared home visibility. It enables quick voice-to-text note entry and can be placed anywhere, supporting multiple open-source software platforms like ESPHome and TRMNL. The device prioritizes simplicity and community-driven development with up to one week battery life.