In case you are looking for in-app feedback & help solution, we use WebEngage to capture NPS scores, reviews, insights, etc.
WebEngage provides targeted surveys and features notifications with plug-n-play layouts and diverse response-types. Great targeting features like navigation based, time-based, user behaviour based, etc. It also has in-app embeddable feedback widget that feels like a part of your app's native design to capture real-time feedback from the users. The user can also take a screenshot of the issue.