Please note that all reviews generated by the app, or submitted through the app will be removed. Please make sure to export all your reviews before uninstalling the app.
To do that, please go to Manage Reviews and click the “Export all reviews” button. The review file is in CSV format.
If you notice the review box still lingers on your product page after removing the app. Please contact us via email@example.com and create a staff account for email firstname.lastname@example.org with access to Apps and Themes.
Please view this instruction https://help.shopify.com/en/manual/your-account/staff-accounts/create-staff-accounts