You are not eligible to give reviews on app available on whole app store, but you are the user of app and you had an experience about working features of app, familiar about service and user interface available on it. So apple always appreciate you for share relevant app feedback directly to developer or other iDevice users who are not aware about app. In case you feel bad on wrong reviews then you have an option for Remove app reviews or ratings officially. So, App finder doesn’t interventional about unknown apps in a single app category.
Steps for Manage/ Remove App reviews or Ratings given by you on App store
This way is not for the developer or App owner, Because Apple restricted about change reviews or ratings coming on app by app users. Not app only, Also for Albums, Movies from the iTunes store.
Using iPhone, iPad or iPod Touch
Step 1: Go to the Setting app in your iDevice.
Step 2: Next, Tap on iTunes & App Store.
Step 3: Then, Tap on View Apple ID from Popup.
Using iTunes on Mac/ PC
Step 1: Launch iTunes on Mac/ PC. Sign in with Apple ID and Password.
Step 3: Re-Enter your password for the verification.
Step 4: Move down and Find the “Reviews and Ratings”, Next tap on Manage.
Step 5: Next, Click on remove the reviews. Still will be visible after delete it. It will automatically remove.
Successfully remove, System will take 24 hours.
Now, you’re done. Next you can add another review on the same App, Albums or Movies if you want after Remove app reviews or ratings.