In order to submit your customers' apps to the stores, you will have to activate a Developer Account with each store in order to be able to publish the apps under your company data (or your customers') and get total commercial control of it.
AppsBuilder platform supports the Apple Store and Google Play for Android.
Please note that when activating a developer account you will have to pay a registration fee and expect a review time for each store. Registration costs for the store are as follows:
• Apple Store - 99$/year
• Google Play - 25$/lifetime