There are a group of people to ride bycicle.
They go to far and not cellular signal.
They need to be communicated.
1.- Then need an app (IOS and Android) to be developed to the posibility of create a group, add users to the group and develo pan schemma to communicate between the people that is member of the group.
2.- The communicatin is without celular provider signal, it means to be used bluethoot or/and wifi. I think bluetooth is just to short distances and if the people are not close each to other, then maybe dont work. Maybe the distance will be about 500 meters or 1000 meters (i don´t know what distance can be handle with wifi or bluethoot) or maybe another type of communication.
3.- The communication can be voice or text