Privacy policy

Your solved problems, reviews and learning-step ticks are saved only in your browser (local storage). They never leave your device unless you sign in.

When you sign up (with email and password, Google, or Sign in with Apple) we store:

• your email address and display name (and profile photo if you use Google). With Sign in with Apple you can hide your email; we then get a private relay address from Apple;
• your learning progress: solved problems, review dates, learning-step ticks and the notes you write on problems;
• your reminder settings: email / push on or off, reminder hours and time zone.
• a history of the reminders we sent you, shown on the Notifications page;
• your LeetCode username, if you connect it. We then read your public LeetCode profile (solved counts and recent accepted problems) to tick problems you solve there. Nothing is posted to LeetCode.

Accounts are handled by Google Firebase Authentication and the data is stored in Google Cloud Firestore. Only you can read or change your own data.

If you turn on notifications, your browser or device gives us a push address (a random endpoint from Google, Apple or Mozilla, or an Apple device token in the iOS app). We use it only to send your daily problem, the evening topic lesson, review reminders and a one-time welcome. Turn notifications off in your browser or app settings, or in your account, at any time.

We don't send reminder emails at the moment. Your email address is only used for your account (sign-in and password resets).

• No advertising, no ad tracking, no selling or sharing your data.
• No analytics or tracking scripts.
• Your solutions are written on LeetCode / NeetCode — we never see your code.

Problem pages embed YouTube videos and link to LeetCode, NeetCode, HackerRank and GitHub. Those sites have their own privacy policies when you visit them or play a video.

Sign in and open your account → Delete account. This removes your account and all progress stored with it immediately. Progress saved only in your browser stays there until you clear your browser data. You can also email us to delete it for you — see how to delete your account.

AlgoChronicle is meant for learners aged 13 and older and is not directed at children under 13.

Questions or requests: contact@srujanchidarla.com. If this policy changes, the date at the top changes too.