Choose the appropriate Apple Developer Program.
You must have a valid Apple Developer account to distribute an iOS app. Apple offers two developer programs:
- Apple Developer Program for organization or for individual – $99/year
- Apple Enterprise Developer Program – $299/year
The main difference between the two programs is:
Apple Developer Program (for organization or individual): Allows you to distribute app(s) on the App Store.
Apple Developer Enterprise Program: Provides resources ONLY for developing and distributing proprietary, in-house apps to employees.
For test purposes you can use a Free Apple Developer Program.
Here is a chart comparing the different levels of developer membership: