Research strongly supports handwriting for subjects where deep retention matters. Studies using brain imaging show that handwriting activates a wider network of brain regions — including those responsible for movement, vision, and memory — compared to typing. A key reason is that handwriting forces active processing: because you cannot write as fast as you can type, you must summarise, paraphrase, and prioritise, which deepens encoding. Typing often becomes transcription, creating the illusion of engagement without the cognitive work.

For UPSC specifically, this matters most for static subjects: Polity, History, Geography, Ethics, and optional papers. These are areas where you need to recall interconnected concepts in a timed handwritten exam — the very mode in which you made your notes. Handwritten notes also directly mirror the format of Mains answer writing, reinforcing the habit.

Digital tools have clear advantages for current affairs, schemes, and any content that needs frequent updating. Notion is suited to structured database-style organisation — useful for tracking schemes by ministry, mapping amendments to articles, or building answer frameworks. Obsidian's strength lies in linking notes together, which is valuable for the interconnected nature of GS papers. OneNote is the most familiar option for aspirants transitioning from general student life.

The consensus among experienced aspirants and toppers is a hybrid model: handwritten notes for static subjects, digital tools for current affairs and dynamic content. If you use a stylus and tablet for digital handwriting, you can combine the cognitive benefits of handwriting with the searchability and organisational advantages of digital systems.