Last updated: April 2, 2026
Coders Gym ("the App") is a mobile application for practicing LeetCode problems. Your privacy is important to us. This policy explains what data we collect, how it is used, and how it is protected.
LeetCode Username
When you sign in, the App stores your LeetCode username locally to fetch your profile and progress from LeetCode's public API. We do not store your LeetCode password.
Locally Stored Data
The following data is stored entirely on your device and is never uploaded to any external server:
LeetCode API
The App communicates with LeetCode's servers (leetcode.com) to fetch problems, run code, submit solutions, and retrieve your profile data. All API calls go directly from your device to LeetCode.
Firebase
The App uses Firebase for basic analytics and crash reporting. Firebase may collect device information, app usage statistics, and crash logs. No personally identifiable information (such as your LeetCode username or code) is sent to Firebase. Learn more at firebase.google.com/support/privacy.
Google AdMob
The App displays advertisements via Google AdMob. AdMob may collect device identifiers and usage data to serve ads. You can opt out of personalized advertising in your iOS Settings under Privacy & Security > Tracking. See Google's advertising policies.
We do not sell, trade, or transfer your personal data to any third party. The only external communication is directly between your device and LeetCode's servers (for API functionality) and Firebase/AdMob (for analytics and advertising).
All user data is stored locally on your device. Uninstalling the App removes all locally stored data. To request deletion of any analytics data, contact us at the email below.
The App is not directed at children under 13. We do not knowingly collect personal information from children.
We may update this privacy policy from time to time. Changes will be reflected on this page with an updated date.
If you have questions about this privacy policy, please contact us at support@hourproof.app.