How to add Terms of Use acceptance in my App?

The Teach on Mars solution comes up with an optional Terms of Use acceptance functionality.

• Guest mode (limited access without login): learners are invited to accept the Terms of Use once they start the application. They must check the acceptance box to be brought to the application home page.
• Authenticated mode (full access with id and password):
• Learners know their connexion IDs: they enter their IDs and are brought to the Terms of Use pop up before they can proceed further
• Learners self create their connexion IDs: they must accept the Terms of Use before they can create their ID and password.

The user validates the Terms of Use once and every time they are updated, on any mobile device.