Every variable is yours
Nothing here is a static diagram with a play button. Change the inputs and the outcome re-renders under your hand — which is how intuition gets built instead of trivia.
Free to try · limited-time betaDon't
Don't
memorize it.
Play with it.
LearnActiv turns the concepts that never quite stick — ad auctions, projectile motion, search intent — into simulations you can drag, break and replay. Move one control and the idea explains itself.
No card · nothing to install · 5 categories and growing
Live — drag me
physics / projectile motion
Range
602 m
Peak
193 m
Hang time
12.5 s
52°
78 m/s
Drag a slider. Notice you now know why 45° goes furthest without anyone telling you.
Concepts you can play with include Ad Rank, Quality Score, Projectile motion, Search intent, Gradient descent, Second-price auctions, Overfitting, Terminal velocity, Attribution windows, Titration curves, Neural nets, Conversion lag.
How it usually goes
Read it. Re-read it. Highlight it. Forget it.
- A definition you can recite but not use.
- A diagram that never moves.
- A worked example with someone else's numbers.
- Thursday, and it's gone.
How it goes here
Grab a control. Break the thing. Now you know.
- Every variable is a slider you can move.
- The output redraws the instant you touch it.
- Your numbers, your experiments, your mistakes.
- Understanding you can rebuild from scratch.
Why it sticks
Interactive isn't a gimmick. It's the whole method.
Understanding arrives when you can predict what happens next. That only comes from turning the knob yourself and being wrong a few times.
One tab, zero setup
No installs, no lab kit, no downloading a 400 MB simulator. Every simulation runs in the browser and resizes to whatever screen you opened it on.
Science and business, same shelf
Search ad auctions sit next to projectile motion. If a concept is easier to feel than to read about, it belongs in the library — whatever field it came from.
Made to be shown
Clean enough to project in a classroom or drop into a client call, and quick enough that nobody is watching a spinner while you explain the setup.
Three steps, about a minute
From 'I've read this before' to 'oh, that's what it does'.
- 1
Pick the fuzzy one
Filter by category, or just scan for the concept you've quietly been nodding along to for years.
- 2
Move something
Drag, launch, mix, bid. There is no wrong input — the wrong inputs are where most of the learning is.
- 3
Watch it click
The moment the output changes with your hand on the control is the moment it stops being something you memorized.
The library
Pick a shelf. Everything on it is free to try.
New simulations land regularly. Categories with nothing in them yet are already on the workbench.
Marketing
Auctions, attribution and intent — bid against the machine and watch it bid back.
Machine Learning & AI
Move the weights yourself and see exactly where a model stops being magic.
In the worksPhysics
Launch it, drop it, spin it. The equations stop being abstract fast.
Chemistry
Mix, heat and titrate without the goggles or the cleanup.
In the worksBiology
Systems you can only really grasp by watching them run.
In the works
Free to tryMarketing
CACn LTV CAC and LTV Modelling
This interactive demo shows how customer acquisition cost and lifetime value of a product can interact with each other and how sometimes a profitable product may also lead to bankruptcy.
Play with it
Free to tryMarketing
Facebook Organic Marketing Algorithm
This interactive demo lets you simulate Facebook's organic algorithm that helps in posts reaching larger audiences.
Play with it
Free to tryMarketing
Meta Andromeda Advertising Algorithm Simulator
A simulator to understand how Meta's new Andromeda algorithm works for Meta advertising
Play with it
Free to tryMarketing
Tool to classify the searcher's intent for search engines
You type a sentence, and based on specific words which are highlighted below, the tool tries to determine what the searcher intent is from one of the four displayed
Play with it
Free to try
Free to tryPhysics
Projectile Motion
Watch how launch angle and speed change a projectile's range and height.
Play with itLimited-time beta
The whole library is free to try — for now.
No credit card. No countdown timer in the corner. Create a free account, open anything on the shelf, and keep playing for as long as the beta is open. Paid plans come later, and we'll say so well before they do.
Before you ask
The short answers.
Do I need an account just to look around?
No. Browsing the library and reading what each simulation covers is open to everyone. You need a free account to actually run one — that's how we keep them stable and work out what to build next.
How long does 'free to try' last?
The full library is open for the duration of the beta. When paid plans arrive we'll announce them well in advance rather than switching anything off overnight.
Will these work on a phone?
They run in any modern browser and scale to the screen. The denser ones — anything with several controls at once — are considerably happier on a laptop or a projector.
Can I use these to teach?
Yes. Project them, share the link, or hand the controls to whoever you're explaining it to. Letting someone else drive is usually the fastest route to the penny dropping.