In the News Feed page, you and anyone who has downloaded your app can post pictures and comments from your phones or tablets.
You can't add items to the News Feed from the online editor. To post from your phone or tablet, tap the pencil icon in the upper right corner of the screen, then enter your message or photo.
Any time a user posts to the News Feed, those who have downloaded the app will receive a notification. If you want to change your notification settings, follow these steps.
You can restrict posting access on your Yapp to only the administrator by upgrading to Yapp Plus. Just click the 'Plus' symbol in the upper right toggle box to upgrade.