Free, open to anyone, no sign-up
Every idea has a dial. Turn it.
Rimi Lab is a family of free labs for business, data and science. Each idea is built as something you can move, so you see why it works, not only that it does.
- 5labs, all free
- 280+lessons with a lab
- 1new Short every day
- 0ads, trackers or accounts
01 Why
Why we built it
You understand a curve once you have bent it.
Most of us learned formulas we could recite but never felt. Here every formula has a handle. Move it, and the page shows what changes and why.
Small steps, every day.
Each site gives you one small step a day and brings back what you are about to forget. That is kaizen: one idea, a little better, every day.
Real numbers you can check.
Every number comes from a model that our tests check, or from a source we link. When we get one wrong, we fix it in the open.
Free and private, for anyone.
Nothing to pay and no account to make. Your progress stays in your own browser, and the labs work the same for a student in a hostel or an analyst at a desk.
02 Try one
Try one now
Five small ideas, one from each lab. Drag a blue number, or tap it and use the arrow keys.
If 40% of people who see an ad visit the shop, 25% add something to the basket, and 50% of baskets are paid for, then people buy.
The steps multiply, so the weakest one costs the most.
The full lesson in Rimi Lab MBAFit a curve of degree 3 to the 12 dark points. On new points its error is .
Raise the degree and watch the curve.
The full lesson in Rimi Lab ModelsPoints it learns fromNew pointsThe true wave
A satellite 420 km above the ground goes once around Earth in .
Try 35,786 km.
The full lesson in Rimi Lab CosmosHeights are squeezed to fit. Kepler's third law, Earth's mass from NASA.
A 2 minutes interview answer at 130 words a minute is , with 60% on what you did.
Keep the scene short so the action has room.
Practise in Rimi Lab CompassWords for each part of a STAR answer.
With a 9-hour shift, a 60-minute commute each way and 7.5 hours of sleep, you have for yourself.
Out of 168 hours.
Plan your week in Rimi PlannerHours in one week.
03 Labs
The labs
Five free sites. Each one opens straight into something you can move.
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Business
Business and MBA
Finance, marketing, operations, people, law and analytics. Move a slider and watch the balance sheet, the funnel or the queue change.
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Data and AI
Machine learning models
Regression, trees, forests, neural networks and language models, built in front of you. Real Python and R run in the page.
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Science
Space and nature
Waves, orbits and patterns, plus a live Earth with the space station, earthquakes and the aurora.
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Careers
Careers
Drop in your resume and see which roles it points to. The resume never leaves your browser.
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Planning New
Rimi Planner
Set your shift, add a course, move things around. It balances the week and exports to Google Calendar.
04 New
New this week
Latest week
Updated every Monday with what went live on the labs the week before. Earlier weeks stay here.
05 Tonight
Tonight's Moon
Working it out in your browser.
Worked out on this page from the date on your device. Nothing is sent anywhere. See it from space on the live globe.
06 Privacy
Nothing to sign up for
Your progress stays in your own browser. We never see it.
- No accounts
- No sign-up
- No cookies
- No ads
07 Contact
Say hello, or help keep it free
Write to us
A lesson you want, a mistake you spotted, or a class that wants to use the labs. We read every message.
Watch the daily Shorts
One idea a day, in under a minute, drawn from the labs. A story every Saturday.
Support the labs
The labs stay free, with no paywall and no ads. Give any amount from ₹199, become a monthly supporter, or pick up a workbook.