Thank you for the reply.
A person request a resource e.g. some water
from a tube for x min. We want a system that the user from a mobile phone can purchase that resource through a ticket system. We are planning of making a server where the user can send in a request for a ticket. The question is how the paying system shall be built, there is mainly 2 ways to go for android/ios app solution or make a SMS system. Does any know if there a customize SMS ticket system available out there? My task is to investigating witch solutions there is on the marked and then to take the decision. Our main thing is that it shall be easy for user.
Hope that gave an overview over the problem and what I'm asking for.