How to use F5 in Enterprise Android/iOS application

Hello everybody, I've made an Android/iOS app for a client to use inside his enterprise network, logging through simple json web token. He has some enterprise web applications that use F5 to grant access from everywhere. Now he wants the same thing for my app. He could not give me any other information but "WE USE F5!" How to proceed? I really don't know where to begin... Thanks (Sorry, I don't know if TECHNOLOGY check tag is right)