Terms of Use

Last updated: September 29, 2026

These Terms of Use apply to PDgo, a product operated by Xiamen Guangxu Zaodong Network Technology Co., Ltd.

Product purpose

PDgo provides a pupillary distance reference workflow for eyewear preparation. The app is designed to help users record and review measurement data.

Reference only

PDgo results are reference only. The app is not a medical device, does not provide medical diagnosis, and does not replace professional optometry, a formal prescription, or qualified eyewear fitting.

Payments and subscriptions

Without an applicable existing entitlement, viewing a completed measurement result requires payment through Apple in-app purchase. PDgo offers two Apple purchase options:

• Single Result Unlock — a one-time purchase that unlocks and saves one measurement result.
• Yearly Unlimited — an auto-renewing subscription with a one-year period that unlocks unlimited measurements on the device.

The exact price is shown in your local currency on the payment screen before purchase. Payment is charged to your Apple ID account at confirmation of purchase. The Yearly Unlimited subscription automatically renews unless it is canceled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel subscriptions anytime in your Apple ID account settings. Previous purchases can be restored with the "Restore Purchases" option in the app. Prices, availability, and refund handling follow Apple App Store rules.

Optional cloud records

Starting with version 1.1.0 build 12, optional WeChat sign-in in the mainland China App Store backs up newly saved unlocked measurement records for restoration using the same account. Earlier local records remain on your device. Backup requires connectivity; pending records remain on this device until synced. You can delete backed-up records or the App cloud account in Mine. Backup does not itself grant paid measurement credits, change purchase terms, or guarantee measurement accuracy. Overseas use remains unchanged.

User responsibility

Beginning with version 1.1.0, the mainland China App Store also supports optional synchronization of existing PDgo mini-program benefits using the same WeChat account. Each confirmed mini-program single purchase includes one independent App retest credit. A medium- or low-confidence result renews one credit; a high-confidence result consumes the credit without renewal. Existing annual access remains subject to its validity period. Confidence describes repeated-measurement consistency and is not a guarantee of absolute accuracy. This app does not provide WeChat payment or an external purchase checkout.

You are responsible for using PDgo in a stable environment, following on-screen guidance, and consulting a professional before making eyewear or healthcare decisions based on measurement data.

Contact

For product support or legal questions, contact developer@lumaseq.com.