You can add a widget to your site or web app so that users can send suggestions directly to you. All suggestions will be added to the Customer Feedback section.
To grab the code, go to Account Settings > Portal and paste it into your site's footer.
The widget can also be added to your mobile app using webview, if you can make the JS library run.
Likewise, you can use the API endpoint that is used by the widget and call that from your own app (the API endpoint is /feedbacks.)
Want to add your own branding? You can customize your widget colors.