Open-source GTD tools like Trayzero and Super Productivity are free, offer strict methodology adherence, and ensure data sovereignty through open formats. Proprietary local-first apps like Obsidian and Everdo provide polished interfaces but often require paid sync, plugins, or one-time fees. The core trade-off is between structured, transparent workflow fidelity and flexible, customizable system-building overhead.
Published July 8, 2026 · 3 min read