ExplainThisDoc - PDF & Archive vs Supernotes: Which Is Better in 2026?

You shouldn’t need a perfect filing system to find a single letter.
ExplainThisDoc helps you get your paperwork under control without making organization another chore. Bring paper letters, PDFs and photos into one free archive on your iPhone or iPad. No folder structure to plan. No sorting routine to keep up with. Add your documents, then find them when you need them.
Think of the moments that usually send you searching: checking an insurance payment, finding a receipt or looking up your rental agreement. With everything together, you can search your archive and open the original. Optional iCloud sync keeps your documents available across your iPhone and iPad.
Find it. Understand it. Get on with your day.
Finding the right document brings relief. Understanding it helps you move forward. Free local analysis with Apple Intelligence on supported devices gives you a short summary and important details, so you can get your bearings quickly. You can also check and correct the recognized text if a scan needs attention.
For something more complicated, optional Pro explanations help make sense of the wording, conditions and possible next steps. An insurance letter becomes easier to follow: what is being paid, what is being held back and what you may need to provide. Keep the original close at hand while you work through the explanation.
Mark the passage that matters or leave yourself a comment, so you don’t have to work it all out again next time. When a document needs your signature, add it without printing. Small jobs become easier to finish.
Your archive is free. Only Pro explanations cost credits. Everyday document tools and supported local analysis are free. Each Pro analysis uses one credit. No subscription. Your first installation includes three complimentary test credits to try Pro.
Your archive lives on your device. For Pro explanations, recognized document text passes through our server to your chosen AI provider.
Start with the next letter. Your archive can grow one document at a time - without a growing filing chore.
Less sorting and searching. More finding, understanding and getting things done.

What problem it solves

People managing their own or their family’s paperwork who want things under control without spending their evenings sorting documents.
Letters pile up, PDFs disappear into inboxes, and important information is hard to find when it’s needed. Even finding the right document doesn’t always make its meaning clear. The result is wasted time, postponed tasks and the nagging feeling that something important has been overlooked.
ExplainThisDoc helps them find and understand their paperwork without maintaining a filing system.

Alternatives & competitors

Choose ExplainThisDoc for everyday paperwork without the upkeep: a free archive where you can find documents and understand them alongside the original. No filing system to maintain, no prompts to write. Your archive works without buying AI; pay only for deeper Pro explanations when needed. No subscription.

Supernotes is a fast, collaborative note-taking app built around "notecards" instead of long documents. Each note is a compact, richly formatted card, and the whole system is designed for speed, atomic thinking and real-time collaboration — a fresh take on notes that many users praise for its exceptional user experience.

What is Supernotes?

Supernotes replaces the endless document with the notecard: a card holds up to 1,200 characters of rich content — text, equations, tables, images, checklists and emojis — and cards link together into a connected web of ideas. You organize with filters, search and sorting, visualize connections as a 2D or 3D graph, and collaborate on cards in real time.

Who it's for

Supernotes suits a wide range of thinkers: students (including IB, Cambridge, medical and engineering), developers and startups, writers, screenwriters and journalists, researchers, educators, lawyers and therapists. Anyone who prefers concise, connected notes over sprawling documents — and wants them fast and shareable — is a natural fit.

Key features

• Notecard system with a 1,200-character limit per card
• Rich content: equations, tables, images, checklists and emojis
• Hierarchical organization with filters, search and sorting
• Backlinks between notes with 2D/3D graph visualization
• Real-time collaboration and commenting
• AI-powered typo detection and idea organization
• Desktop and mobile apps with two dark themes
• Markdown import, PDF/Markdown export, API and integrations

Atomic notes by design

The 1,200-character card isn't a limitation so much as a philosophy. By capping each card, Supernotes nudges you to distill an idea to its essence rather than paste in walls of text — as one user put it, the concise design "forces me to hone my notes into the key points." For studying and thinking, that atomic structure makes notes easier to review, reuse and connect than long, rambling documents.

Connected thinking

Cards gain power when linked. Supernotes supports backlinks between notes and renders those connections as a 2D or 3D graph, so you can literally see how your ideas relate — a boon for researchers and students building a web of knowledge. Combined with strong filters, search and sorting, it stays navigable even as your card collection grows large.

Fast, collaborative and polished

Speed and UX are where Supernotes earns its fans. Keyboard shortcuts make creating and moving between cards near-instant, the interface is clean and quick, and real-time collaboration with commenting lets teams and study groups work on the same cards together. A "Thoughts" collection even helps recover lost notes — small touches that reflect a genuinely well-crafted app.

Yours across every device

Supernotes keeps your cards in sync across desktop and mobile apps, with two dark themes for comfortable late-night work, so your notes are always at hand in the same fast interface. It plays well with your wider workflow too: you can import from existing Markdown notes, export cards to PDF or Markdown, and connect through its API and integrations — so adopting Supernotes doesn't trap your knowledge inside a silo you can't get it out of.

Why choose Supernotes

For anyone who wants note-taking that's fast, concise and connected — and a joy to use — Supernotes is a distinctive choice. Its notecard format encourages sharper thinking, its backlinks and graph reveal how ideas fit together, and its speed, collaboration and polished design make it a compelling alternative to traditional document-based notes, with a free tier to try it out.