TianJi YanXiang · Service and Support

Use these guides and FAQs to resolve purchase restoration, permissions, data management and surveying issues.

Please include

Device model, iOS version and app version.
The affected feature, steps to reproduce and any displayed message.
For purchase issues, the product type and whether you use the App Store release or a test build.
If attaching screenshots, hide names, birth information, home addresses and other private details.

Frequently asked questions

How do I restore an annual subscription or lifetime purchase?

Open the membership purchase page in Settings and choose Restore Purchases. Use the Apple Account used for the purchase. Release and test builds have separate purchase records; the app displays the restore result.

Does Restore Purchases reissue single-use credits?

Single-use credits are consumable products and are not reissued through Apple restoration. Backup migration to another device requires both the balance records and the original verification key. Contact support before buying again if a storage or verification error appears.

How do I cancel a subscription or request a refund?

Manage renewal in iPhone or iPad Settings → Apple Account → Subscriptions. Deleting the app does not cancel a subscription. Apple handles billing and refunds; submit a request through Apple’s Report a Problem page.

How do I delete owner and family profiles?

Open Settings → Family data management to delete an individual family member or clear owner and family profiles and disable personal analysis, without a paid membership. Delete exported, shared or separately archived files where they are stored.

How should I check compass or spatial-survey results?

Move away from magnets, metal and other interference and follow the app’s calibration guide. LiDAR scanning requires compatible hardware; VR models depend on entered dimensions. Results vary with the environment and operation, so verify them on site before measurement or construction decisions.

Report a purchase problem to Apple

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