Privacy Policy
Effective date: November 2, 2026
This policy explains how the PlayDSA mobile app ("PlayDSA", "the app", "we", "us") handles information. PlayDSA is developed by Sterin Saji. If you have any questions, contact us at hello@sterin.dev.
1. Information we collect
None. PlayDSA does not collect any personal information or usage data, and it does not send any data to us or to anyone else. Specifically, the app does not:
- require you to create an account or sign in;
- use analytics, crash reporting or tracking tools;
- show ads or include any advertising SDK;
- use an advertising ID or any device identifier;
- access your location, contacts, camera, microphone, photos or files;
- request the Internet permission on Android. The app works fully offline.
2. Information stored on your device
To save your progress, the app keeps a small amount of data in its private storage on your device. This data never leaves your device, and we cannot see it.
| Data | Why |
|---|---|
| Name you type during setup (optional) | To greet you in the app |
| Buddy colour, daily goal, sound and code-language settings | To remember your preferences |
| Stars, XP, streak, shields, Blitz best score, games played | To track your progress |
| Review schedule for completed levels | To power spaced repetition ("rusty" skills) |
You can delete this data at any time by using Me → Reset progress in the app, by clearing the app's storage in your device settings, or by uninstalling the app.
If your device's own backup feature (for example, Android backup to your Google account) is turned on, the operating system may include app data in that backup. That backup is controlled by your device and its provider, not by PlayDSA.
3. Purchases
PlayDSA is a paid app with no in-app purchases. Payment is handled entirely by Google Play. We do not receive or store your payment details. Google's handling of your purchase is covered by the Google Privacy Policy.
4. Links to other websites
Lessons include links to practice problems on leetcode.com, and the Help button opens your email app. These open outside PlayDSA. The app itself sends nothing, but the websites and apps you open have their own privacy policies, which we encourage you to read.
5. Sharing and selling
We do not share, sell, rent or trade any information, because we do not have any.
6. Children's privacy
PlayDSA is designed for users aged 13 and over. Because the app collects no personal information from anyone, it does not knowingly collect personal information from children under 13. Parents with questions can contact us at hello@sterin.dev.
7. Security
Your progress is kept in the app's private storage, which other apps cannot read under Android's normal security model. Since no data is transmitted, there is nothing to intercept in transit.
8. Your rights
Depending on where you live (for example under the GDPR in the EU/UK or the CCPA in California), you may have rights to access, correct or delete personal data. Because PlayDSA does not collect or hold personal data about you, there is nothing for us to access or delete. All app data is on your device and under your control, as described in section 2.
9. This website
This website is a static site hosted on GitHub Pages. It uses no cookies, no analytics and no tracking scripts. GitHub, as the host, may process technical data such as IP addresses in server logs. See the GitHub Privacy Statement.
10. Changes to this policy
If we ever change how PlayDSA handles information, we will update this page and change the effective date above. If a future version were to collect any data, we would say so clearly here and in the app before it happened.
11. Contact
Questions about this policy? Email hello@sterin.dev.