Contact
Email 68183830@qq.com. Include your device model, iOS version, app version, and a description of the issue. Do not include patient information, passwords, or payment-card details.
Restore a purchase
Open CNA Prep → Settings → Restore Purchases. Confirm that the device uses the same Apple Account that made the purchase.
Manage or cancel a subscription
Open iOS Settings → your name → Subscriptions → CNA Prep. Deleting the app does not cancel an active subscription.
Report a question
Email the question ID, the answer you believe needs review, and the public source or state handbook section that supports your concern. Do not send recalled or confidential exam questions.
Response target
Support messages are normally reviewed within five business days. Apple handles App Store billing and refund decisions.
CNA Prep is an independent educational product. It does not provide medical advice or guarantee an exam result.