When installing the enterprise signature application for the first time, you need to add trust. Find the corresponding certificate in Settings-General-Device Management, and click Trust to successfully launch the APP. There are three types of Apple developer accounts: individual developer account ($99/year), company developer account ($99/year) and enterprise developer account ($299/year).
The similarity of these three accounts is that they can all be used to develop apps, but the difference lies in the way of publishing apps. Individual developer accounts and company developer accounts can only publish the App to the APPle Store, and only after a long and harsh review by Apple auditors can they appear in the App Store and be searched and downloaded by users.
Enterprise developer accounts cannot publish applications to the APP Store, but Apple allows applications signed by enterprise accounts to publish applications directly without being reviewed by Apple. After signing, a new installation package is generated and then transmitted to the distribution platform for all iPhone users to download and install.
Due to Apple's strict review, a large number of apps cannot be approved by the App Store. For example, app review conditions related to wealth management, games, lottery tickets and blockchain are relatively strict, and a series of qualifications need to be provided. Most developers are not qualified and can only choose the way of enterprise packaging and signature to publish.