Q: I cannot write reviews for the app I actually installed.

Greetings HongdongDonald,

Thank you for using Apple Support Communities. It seems like you want to write a review for an app on your device, but it does not believe you purchased the app. Did you purchase the app using a different Apple ID? I would recommend you read this article, it may be able to help troubleshoot the issue. 

See your purchase history in the iTunes Store on a Mac or PC - Apple Support

If you don't recognize a purchase, compare your purchase history to your credit or debit card statement before contacting Apple. 

If you don't see your purchase, it might be hidden. Learn how to hide or unhide items in your Purchase History. 

If you can't find an item that you purchased in the iTunes Store within the last 90 days, report a problem. For older purchases, contact iTunes Store support, and select Purchases, Billing, and Redemption.

Take care

Thank you for using the Apple Support Community. Due to the nature of your issue you may find more information by using another one of Apple's support resources - https://expresslane.apple.com/GetproductgroupList.action