Stuck on a 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.
Try it free - 4 tasks a day · Version 1.5.7, 2026-10-15
Try it yourself first. The answer can wait.
It doesn’t blurt out the answer. Want more? The key idea, the common mistake, why the other options are wrong, and a similar task to practise.
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.
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 kept anywhere: our server only passes them on to Google Gemini for the answer. No ads, and we never sell data. Privacy policy.
Questions
How much does Korepetitorius cost?
You can try it free: signed in, you get 4 tasks a day with the built-in AI. For no daily limit there is Plus: €4.99 a month, €29.99 for the school year (until 30 June) or €14.99 for the exam season. You get Plus in the app's Settings; payments are handled by Stripe.
What is Plus?
An optional paid plan: practically no daily limit, more questions for each task and the most accurate AI model. Monthly €4.99 (cancel any time), school year €29.99 once (until 30 June), exam season €14.99 (March to June). You can buy it in the app’s Settings; payments are handled by Stripe.
Isn’t this cheating?
Learn mode gives you a hint and the solution step by step first, and shows the answer only when you ask for it. Use it for homework and revision, not in tests, and follow your school’s rules.
Which subjects does it work for?
Maths, physics, chemistry, Lithuanian, English, history, geography and the driving theory test: anything you can see on your screen. It reads text, formulas, graphs, diagrams and road signs.
Does it work on Windows and Mac?
Yes: macOS (Intel and Apple Silicon) and Windows 10 and 11. You select a task with ⌘⇧S on a Mac or Ctrl+Shift+Space on Windows.
Are my screen captures stored anywhere?
No. Captures are never written to disk. For the answer they pass through our server to Google Gemini, but our server doesn’t keep them.
Which language does it answer in?
Lithuanian or English: you choose in the settings.
Does it need the internet?
Yes. The task is analysed by AI (Google Gemini), so it needs an internet connection.
Stuck again? ⌘⇧S
Try it free - 4 tasks a day · Version 1.5.7, 2026-10-15