Curiosity, given a place to go.
Six things you do on Circin — from the first swipe to sharing what you know.
Discover something interesting
Open Circin and scroll a feed built around curiosity — chemistry, history, engineering, money, maps, minds.
Hear someone explain it
Every video is a real person who knows the thing — not a faceless compilation.
Go deeper
One answer usually leads to another question. Follow the idea into its Subject, related concepts, and sources.
Save what matters
Build a Library of things worth remembering — organized your way.
Ask what comes next
Questions get answered by creators — sometimes with a whole new video.
Share what you know
When you’re ready, the creator studio is built in. Everyone knows something worth sharing.
Everything Circin does.
The features behind those six steps — all of them in the app today.
For You feed
A vertical feed built around curiosity, not engagement bait. Tap “Why this?” on any video to see exactly why it was shown — and say “more like this” or “not interested.”
Categories
Pick your own subject mix — eight categories, 54 subtopics — and get a feed that stays on your topics. Nothing sneaks in.
Explore
Search is lexical-first: type math and you get math. Browse subjects, subtopics, creators, and skill levels from Introductory to Advanced.
Go Deeper
Every video suggests the natural next step — the same topic one level up, a prerequisite, or the counter-argument.
Sources & corrections
Creators attach sources to what they say. If something changes, they post a correction that shows up on the original video.
Collections
Save videos into collections, organize by subject, collaborate with friends or a study group, and share a private invite link.
Questions & Q&A
Ask a question under any video. Creators answer the most-wanted ones first and can open a Q&A session for the day.
Private notes
Write timestamped notes on a video — private to you, searchable in your Library, tap a note to jump back to that moment.
Create
Record with the camera, your screen, a whiteboard, audio-only, or slides. Captions draft automatically; you review the specialized terms.
Creator Studio
Honest analytics, versioned edits (v1 stays live until you publish v2), scheduling, and a content-status view for every post.
Accessibility
Captions with a language switch, text size, reduce motion and flashing, dark mode, and screen-reader descriptions for whiteboard videos.
Open by design
Watch, search, and browse as a guest. An account is only for owning things — likes, saves, follows, comments. No subscriptions, ever; paid placements are always labeled Sponsored.