When a blind or visually impaired person requests assistance, we send out a notification to several volunteers (usually 10) - the first one who is available and answers the call will be connected. Thanks to this system, the waiting time for the blind to get connected is currently under 15 seconds.
The app is set in a way that all calls are connected anonymously based on language and timezone. Our sighted volunteers will always receive calls in their native language and only during their day-time - between 8am - 9pm. The app will automatically synchronise with the time zone your phone is set to, so there's no need to choose your time zone if you travel. If you are busy or unable to answer the call, don't worry, it will be automatically redirected to another volunteer.
At this point, it's not possible to customize your availability hours.