Privacy Policy

1. What KAAMDIN Is

KAAMDIN is an Android work and earnings tracker built by Dreydan Software. It lets users log daily work entries on a calendar (working hours, hourly rate, currency, notes, absent days, and payment-credited status) and view monthly receipts with earnings totals and charts. The app also offers multiple languages, multiple currencies, and an optional app lock (PIN or biometric) that hides earnings amounts until verified.

This Privacy Policy applies specifically to the KAAMDIN Android app. It is separate from the privacy policy of our other app, YUWAI.

2. What KAAMDIN Accesses and Why

Network Access (Internet)

KAAMDIN declares Android's INTERNET and ACCESS_NETWORK_STATE permissions. These are used solely for loading advertisements (Google AdMob) and for Play Integrity device checks. The app has no accounts, no sign-in, and no cloud sync of its own.

App Lock (PIN / Biometric)

KAAMDIN offers an optional app lock that hides earnings amounts behind a "Check amount" step. When enabled, the user verifies with a 4-digit PIN or with the device biometric prompt (fingerprint/face, handled entirely by Android). Verification runs locally on the device. A non-reversible hash of the PIN is stored on the device so the app can verify future entries; the PIN itself is never stored in plaintext. The app does not read, collect, or store any biometric data.

Play Integrity Checks

To detect tampered or sideloaded copies of the app, KAAMDIN may request a Play Integrity verdict from Google Play. This sends device and app integrity signals to Google so it can confirm the app is genuine and installed from Google Play. No work entries, earnings data, or personal content are included in these checks.

3. What KAAMDIN Does Not Access

KAAMDIN does not access the following:

• Location data (GPS, network-based, or otherwise)
• Contacts, call logs, SMS, or notifications
• Camera, microphone, or media files
• Calendar, phone state, or biometric data
• Device identifiers (IMEI, Android ID, serial number)
• Accounts, email, or sign-in credentials (the app has no login)

4. How Your Work Data Is Handled

On-Device Storage Only

All data you enter in KAAMDIN — daily work entries, hourly rates, currencies, notes, absent/credited flags, display preferences, language, and the app-lock settings — is stored locally on your device using Android's on-device storage. Nothing you enter is sent to Dreydan Software or to any server operated by us. The app works fully offline; an internet connection is only needed for ads.

No Transmission to Our Servers

KAAMDIN does not transmit your work entries, earnings totals, notes, PIN, or preferences to Dreydan Software. There are no analytics SDKs and no crash-reporting SDKs in the app. The only network connections the app makes are:

• Google AdMob (for loading advertisements)
• Google Play Integrity (for app-integrity verdicts)

Neither service receives your work entries or earnings data.

System Backup

Android's system backup may copy the app's on-device data to your own Google Drive backup if backup is enabled on your device. That backup is managed by Google under your Google account settings and is outside KAAMDIN's control.

5. Third-Party Services

KAAMDIN integrates the following third-party services:

• Google AdMob — serves native advertisements on the calendar and receipt screens. AdMob may collect device advertising identifiers for ad personalization. Users may opt out of personalized ads in their Google account settings. Google Privacy Policy.
• Google Play Integrity API — verifies the app is genuine and installed from Google Play. Operated by Google LLC. Google Privacy Policy.

KAAMDIN does not use Firebase, analytics SDKs, crash-reporting tools, or any other third-party services beyond those listed above.

6. Children's Privacy

KAAMDIN is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it.

7. Data Retention

• Work entries and preferences — retained on the device until the user clears the app data or uninstalls KAAMDIN.
• Integrity verdicts — checked in memory at app start; not stored.

8. Data Deletion

Because KAAMDIN holds no cloud copy of your data, deleting your data means removing it from your device: uninstall the app or clear its data through Android Settings → Apps → KAAMDIN → Storage → Clear data. There is no account to delete and nothing to request from us.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date. We encourage you to review this policy periodically.

10. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or your personal data, please contact us:

Email: dreydan.dev@outlook.com

Studio: Dreydan Software

Website: dreydan.pages.dev