Switch the metro ticket

Advantages :

- Ease and simplicity of use

-: There is a conversation in order to be agreed between you and the person required to change the ticket with him

- Find a person to switch the ticket with depending on the type of ticket, station and moving station access

-: Calculates the shortest path when using transform stations

-: Calculate the number of stations when moving between different metro lines

: - A feature will be added soon (room group conversation to anyone in it can talk to those present)