Support — Scan PDF: Quét tài liệu & OCR

Last updated: 2026-09-15 · Developer: NKKTech Global (NKKTECH GLOBAL PTE. LTD., 18 Sin Ming Lane, #07-13 Midview City, Singapore 573960)

This page applies to the following app, published under the developer name NKKTech Global by NKKTECH GLOBAL PTE. LTD. ("NKKTech", "we"):

Contact us

Email support@nkktech.com. Please include your device model, operating-system version, the app version and what you were doing when the problem happened. We usually reply within 2 business days.

Frequently asked questions

Do I need an account? Where is my data?

No account is needed. Everything you enter is stored only on your device and the app works offline. Uninstalling the app deletes that data.

Why do I see ads?

Ads (Google AdMob) keep the app free. On iOS you can decline tracking in the App Tracking Transparency prompt and still use every feature; you can also reset or limit the advertising ID in your device settings.

I bought an in-app purchase but it is not active.

Purchases are handled by the App Store or Google Play. Connect to the Internet, sign in with the same store account you bought with, then use Restore Purchases in the app. For refunds, contact Apple or Google Play.

App lock does not accept Face ID / fingerprint.

Make sure Face ID, Touch ID or fingerprint is set up and allowed for the app in your device Settings. If biometrics fail, use your device passcode when prompted.

The camera or photo picker does not open.

Allow Camera and Photos access for the app in your device Settings, then reopen the app.

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