KorepetitoriusDon’t get the problem? Circle it.
Press ⌘⇧S in any app, draw around the task with your mouse, and Korepetitorius shows you where to start: a hint, the rule, the solution one step at a time.
Free · Version 1.4.0, 2026-10-13
Try it yourself first. The answer can wait.
It doesn’t blurt out the answer. Stuck? You get a hint. Still unclear? The solution one step at a time, with why each step works.
A jacket cost €150. The shop took 20% off. How much does the jacket cost now?
Done your homework? Check it before you hand it in.
Quick check
Circle the whole page and get the answers with a short reason. See what’s right and what isn’t, and open the full explanation for anything you missed with one click.
Learn
When you want more than the answer: the key idea, the common mistake, why the other options are wrong, and a similar task to practise.
Maths, physics, even the driving theory test.
Chemistry, languages, history, geography – anything that fits on your screen. It reads text, formulas, graphs, diagrams and road signs, and answers in Lithuanian or English.
Three steps, one minute.
- Download and install. You’ll find the app in the menu bar (Mac) or the notification area (Windows).
- Sign in with Google or with an email address.
- Press ⌘⇧S and draw around the task.
What you circle, we don’t keep.
Screen captures are never written to disk or sent to us. No ads, and we never sell data. Privacy policy.
Stuck again? ⌘⇧S
Free · Version 1.4.0, 2026-10-13