Tap the settings gear on the front page > click "Leave Feedback." We then package up an email with almost everything we need to know about your app and the device it is running on. Please enter the issue you are having in the email and we will get back to you.
On Android you will hit the overflow button at the top-right of the front page > click "Settings" in the drop down. In the settings page, click "Leave Feedback." Follow through with allowing the app to build an email, include any feedback and hit send.