Privacy Policy

In short

• You can practise every question without logging in. Then nothing about you is sent to us: your answers and bookmarks stay only on your phone.
• If you log in, we store your mobile number, name and class, and your practice answers and bookmarks, so they open on every phone or computer you use.
• Your data is stored with Google Firebase. Ajinkya Sir (Physics Circle) runs this website.
• You can delete your account any time: see how.

Last updated: 11 November 2026. This website is run by Er. Ajinkya Sir, Physics Circle / Ajinkya Physics Academy, Chhatrapati Sambhajinagar.

1. Practising without an account

The practice pages, solutions, study material and videos work without logging in. Your answers, bookmarks and settings (like dark mode or text size) are saved only in your phone's browser. They are not sent to us. If you clear your browser data, they are removed.

2. What we store when you log in

• Mobile number: you log in with it. We send a one-time code (OTP) by SMS to check that the number is yours.
• Name and class (Class 11, Class 12, Repeater or Other): you type these once, after your first login.
• Your WhatsApp updates choice: whether you ticked "Send me Physics Circle study updates on WhatsApp".
• Your practice: the option you chose for each question you answered, the questions you bookmarked, and when they were last changed.
• The dates your account was made and last changed.

We do not ask for your email, address, photo or any payment details on this website.

3. Student portal (homework and tests from Ajinkya Sir)

If you study with Ajinkya Sir and he gives you access to homework and tests, the portal also stores:

• your name, batch, and your mobile number or the Login ID and PIN Sir gave you;
• the homework and tests given to you;
• your answers, the time you spent on each question, and when you started and submitted;
• how many times, and for how many seconds, you left the test screen during a test.

Your answers are saved on your phone first and then in your account, so a lost internet connection does not lose them.

4. Why we store it

• To log you in and keep your answers and bookmarks on all your devices.
• So Ajinkya Sir can give homework and tests, see your results, and guide you.
• If you said yes to WhatsApp updates: to send you Physics Circle study updates on WhatsApp.

5. Who can see it

• You can see your own account and progress.
• Ajinkya Sir (Physics Circle) can see the list of students who signed up (name, mobile number, class and sign-up date), and the homework and test results of students he has given portal access to.
• Other students cannot see your data.

6. Where it is stored

Logins and data are stored with Google Firebase (Firebase Authentication and Cloud Firestore), a service from Google. Google checks the login with reCAPTCHA to stop misuse; the Google Privacy Policy applies to that.

Videos on this website are played from YouTube or Instagram. When you play one, those websites receive your visit, as they do on their own sites.

7. Students under 18

Most of our students are in Class 11 or 12 and are under 18. If you are under 18, please show this page to a parent or guardian before you log in. Logging in is never needed to practise. A parent can message us to see or delete their child's data (see "Contact" below).

8. How long we keep it, and how to delete it

Your account stays until you delete it. To delete it:

• Log in, open My account and tap Delete my account; or
• send us a request on WhatsApp.

Read Delete your account for the full steps and what gets deleted. To stop WhatsApp updates, just message us.

9. Paid courses

Paid batches (like Vajra 2.0) are sold in the Physics Circle app (made with Classplus), not on this website. That app has its own login and privacy policy.

10. Contact

Questions about your data? WhatsApp or call +91 94239 07256.

Ajinkya Physics Academy, SNY Heights, opposite Sant Eknath Rang Mandir, New Usmanpura, Chhatrapati Sambhajinagar 431005.

If this policy changes, the new version will be on this page with a new date.