Creation of mobile apps is the built-in feature available to all StoreHippo stores. You can build mobile apps for Android and iOS devices very easily. After creating the app, the next step is publishing it.
Kindly follow the steps as mentioned in the link below to publish it on Appstore/Playstore:
Android: https://help.storehippo.com/topic/publishing-android-mobile-app-on-google-playstore
iOS: https://help.storehippo.com/topic/creating-an-itunes-connect-record-for-an-app