Follow whatever makes you curious.
A feed built around learning without turning learning into homework. Something can be watched, questioned, saved, rated, checked, asked about — or allowed to send you somewhere completely unexpected.
Eight Subjects, fifty-four topics inside them, and a feed you decide the shape of.
Circin is new, so there is not much in the feed yet — it fills as creators publish.
Unique features of Circin, for you.
Pick a feature — the phone jumps to that screen in the live app. Tap and swipe inside it.
Circin doesn’t ask for a heart — it asks what you thought. When a video ends you give it one to five stars, the way you’d rate a lesson rather than a friend, and nobody but you sees how you rated. Everything you give three stars or more is kept for you in your Rated tab, sortable by star, so the explanations that actually landed are always one tap away.
For under-13s: a kid profile on a parent’s phone, not an account of their own. A kid sees only what has been cleared for Circin Kids: a video someone uploads is invisible there until a person approves it, and Circin’s own sample library is admitted by a Subject rule rather than by a person — the Admin queue counts how many a person has actually decided. A kid can’t comment or message anyone, and nothing about what they watch is sent to Circin — no email, no name, no history. Their likes and collections live on that phone, behind the parent’s PIN.
Your own account, with your kid’s profile underneath it. You choose a four-digit PIN, hand the phone over, and your account waits behind it — leaving Kids mode or changing its settings needs the PIN. When your kid turns thirteen, you decide whether the profile becomes a full account. Nothing about your child leaves the phone without you.
Curiosity that hasn’t been answered yet. Ask for the explanation you want — a topic, a question, a why — and it goes on a public board creators read, where other people can upvote it. The most-wanted explanations are the ones that get made, and when a creator answers yours with a video, you’re told.
Eight subjects and fifty-four subcategories — Science, Math, History, Coding, Finance, Philosophy and more. Pick one and the feed becomes only that; pick a subcategory to go narrower; follow a subject and more of it flows into your For You. Search is literal: type math and you get Mathematics, Algebra and Calculus, never whatever is trending this week.
Not everyone learns the same way. Tell Circin how you like things explained — a Lesson, a Learn-Along, something Hands-On, an Analysis — and your mix leans toward that. Every video carries its style, so you know what you’re getting before you tap.
Tell Circin where you are — Introductory, Beginner, Intermediate, Advanced — and it meets you there instead of guessing. A creator can say what level they are pitching at, and when they have, the video shows it — so a first look and a deep dive don’t get mixed into the same swipe. Your answer ranks what you see rather than hiding anything, and you can change it whenever you like.
Your own shelf. Save videos into folders you name, keep the topics you mean to come back to, and let the Rated tab gather everything you gave three stars or more. Collections stay on your phone — your curiosity, in one place, on your terms. Sharing one with somebody else is still to come.
Creators on Circin are people with something to explain, and they show their work: the sources behind a video sit one tap away. Follow the ones worth hearing from and their new videos land in your Following feed; ask them in the comments, and the best questions become their next video. Creators can sign up and publish before launch.
You’re not watching alone. Comments are for questions as much as reactions — questions get their own filter, replies thread underneath, and you’re told when someone answers you or follows you. Follow the people asking good questions and find the ones curious about the same things you are.
You decide what decides what you see.
Circin has four ways in, and you switch between them at the top of the feed. None of them is a black box.
For You
Ordered by things you told Circin, in that order: the topic you starred on your profile, the Subjects you follow, anything you asked for more of, then your interests. Not by whatever kept someone else watching. Anything you played in the last three days moves to the back, so the same video does not greet you every time you open the app — and tapping Why am I seeing this? tells you which of those put a video in front of you.
Following
Only the people you chose to follow. Nothing else is mixed in, and nothing is held back — if they published it, the people who chose you have it.
Categories
A mix is yours to build from the eight Subjects and the fifty-four topics inside them. It is an or, never an and: pick Physics and Philosophy and you get both, interleaved, not the narrow slice where they overlap.
General
One shared order, the same for everyone — nothing about you decides what is in it or what comes first. Two of your own settings still apply: anything you have hidden or blocked stays hidden, and a video you watched in the last three days moves to the back so the feed stops repeating itself. It is there for the days you would rather not be profiled by your own history.
Style and level
Tell Circin how you like things explained — a Lesson, a Learn-Along, something Hands-On, an Analysis — and where you are, from Introductory to Advanced. These rank your mix rather than cutting it down, so a preference never quietly hides a video from you. A video only carries a level if its creator gave it one; Circin does not invent one.
Search that takes you literally
Type math and you get Mathematics, Algebra, Calculus and the people who teach them. Not a loose association, not what is popular this week. It knows maths means the same thing and forgives an obvious typo.
| As a guest | With an account | |
|---|---|---|
| Watch, search and browse | Yes | Yes |
| Read comments and the question board | Yes | Yes |
| Rate, save or follow | A short prompt, naming which one | Yes, and it becomes yours |
| Comment, ask or upvote | A short prompt about commenting or asking | Yes |
Swipe the table →
Four ways to learn.
Different people learn differently. Every video carries its style, so the kind of explanation is clear before the tap.
Lesson
Clear explanation. Teach me something.
Learn Along
Understand something alongside the creator, at their pace.
Hands-On
Learn by doing — the video is a thing to follow, not only to watch.
Analysis
Break something apart and understand why it works.
Skill level travels with the video too, so an explanation pitched at where you are starting is findable.
Don’t just like it. Think about it.
Circin has private one-to-five star reviews. The rating belongs to you: nobody sees how you rated, and the creator sees only the average. Anything rated highly can go into your Rated library, which is another way to keep the explanations that actually helped.
Because sometimes “was this useful?” is a better question than “did I tap the heart?”
Sources are part of the video.
Good learning encourages checking. Creators can attach the papers, books and articles behind an explanation, and they sit one tap away on the video itself — on Circin’s sample library and on anything a creator publishes. See the source. Visit it. Report a problem with it. Keep digging.
Knowledge doesn’t have to be solitary.
Questions have their own space, separate from comments. A comment can also carry a lens — Question It, Perspective, Analyze, Apply It, Counterpoint, Evidence, Connect, Build On It — a way of thinking you pick before you write, if one helps; a plain comment counts too. There is room to ask, to join a discussion, to reply, to help someone else understand something, to follow creators and Subjects, and to hear when a question was answered — alongside people interested in the same things.
Learning doesn’t disappear when the feed moves on.
Organised however your brain organises the world. All of it lives on your phone and rides along in your Circin Cloud backup, so signing in elsewhere brings it back.
Your curiosity doesn’t fit into one category.
Astrophysics and basketball. Psychology and cooking. Computer science and history. Nobody has to choose what kind of learner they are.
Students
The classroom explanation didn’t click? Another one is here. Still confused? Asking is a tap away. The background is in Go Deeper. And the person who finally makes the subject make sense can be followed.
Lifelong learners
There is no graduation from curiosity. Learning because a career requires it, because you became a parent, because astronomy got interesting at 2:00 AM, or for no practical reason whatsoever. Curiosity is enough.
Parents
A different kind of children’s feed — deliberately more limited than the full app, behind your PIN, with time limits, and with public commenting, messaging and creating removed. A safer doorway into curiosity, not a smaller copy of the adult internet.
Younger learners
Dinosaurs. Space. Animals. Machines. Math. History. The human body. Questions can begin almost anywhere, and Circin Kids is built so a child can wonder about the world without joining the full social internet.
Circin would rather earn your attention than assume ownership of it.
Brain Breaks. Screen-time awareness. Not Interested. Topic and creator controls. Watch-history controls. Privacy settings. A General feed that ignores everything about you. And ways to leave something unfinished and come back to it later.
The person explaining it is reachable.
Circin is built around people who know something, not around anonymous content. Everything below is one tap from a video.
Their next video comes to you
Following a creator puts everything they publish into your Following feed. The follower count on their profile is counted on Circin’s side from real accounts, and a video with no ratings yet says exactly that rather than showing a number nobody gave it.
Everything they have made, in one place
Their videos, the subjects they work in, and any series they have built — so you can tell in a few seconds whether this is someone worth hearing from again.
They show their work
Where a video carries its sources, the papers, books and articles behind it sit one tap away. On Circin’s own sample library that is most of them. On videos creators publish it is none of them yet — the record does not carry sources to a viewer, and creators are told that before they publish. Making it do so is the next thing on this list.
A question is not buried under reactions
Mark what you write as a question and pin it to the second it is about — anyone reading taps the timestamp and the video jumps there. Questions have their own filter, and so do the creator’s replies, so the exchange worth reading is findable rather than buried. Reading takes no account; writing does.
Only what you asked to hear
You are notified when someone replies to you, likes what you wrote, or follows you — and the bell in your Inbox is where you turn any of those off. Nothing is on because it suits us.
The video that does not exist yet can be asked for.
Every other feed lets you choose from what has already been made. This is the part that runs the other way.
You ask
A topic, a question, a why you never got a straight answer to. It goes onto a public board that creators read. You can ask without your name on it — Circin still knows it is yours, so you can take it down later, but nobody else does.
Other people want it too
Anyone can upvote a question. The ones people actually want rise, and creators can see exactly what is being asked for and how badly.
A creator answers it
The board is the standing record of what people want explained, and the first place a creator looks for something worth making. They publish a video against your question and link it — Circin checks the video is really theirs before it counts.
You are told, and the link stays
The answer arrives in your inbox naming your question, on whichever device you are on. The video itself then carries a line back to what was asked, so anyone who finds it later can see what somebody wanted to know.
The thing that finally made sense does not have to get lost.
Circin asks what you thought of an explanation, and then keeps the good ones for you.
Stars, not hearts
One to five, the way you would rate a lesson rather than a friend. The number under the star is the real average of real accounts, one rating each — and nobody, creator included, can see which one was yours.
The Rated tab
Everything you gave three stars or more gathers itself in one place, without you having to remember to save it. Sort it by how highly you rated it.
Collections
Folders you name, for the things you mean to come back to. They are yours — nobody else sees them — and they follow you to another device when you sign in.
Your data, as a file
Everything this device holds about you downloads immediately — not an email with a link in it within forty-eight hours. It is built from what is stored here, which for a signed-in account is the same thing that syncs, and the file says so at the top. Deleting your account takes your videos down with it.
And what Circin will not do.
A list of features is only half of what you are agreeing to. Here is the rest of it.
No subscriptions. Ever.
No premium tier, no ad-free plan, nothing behind a monthly payment. Circin is paid for by advertising that is always labelled Sponsored, never by charging you for the parts that matter.
No account to watch
Search, browse and watch as a guest for as long as you like. Circin asks for an account at the moment you do something that becomes yours — rating, saving, following, asking — and tells you which one, rather than putting a wall in front of the door.
A kid’s account is not an account
Under thirteen, a profile lives on a parent’s phone behind their PIN. Nothing about what a kid watches is sent to Circin — no email, no name, no history — and they see only videos a person has approved for Circin Kids.
What is not built yet
Direct messages between people, and any way to pay a creator, do not exist on Circin today. When a feature is not ready, the app says so on the screen where you would have looked for it, rather than pretending.
Circin is new, so there is not much in the feed yet — it fills as creators publish.