Yes. Sterkla picks up the time zone from your mobile phone or the time zone on your laptop if you are using the Web app.
Booking appointment with a coach…
If you are booking an appointment with a coach, Sterkla translates their availability (working hours) into your time zone. So, no matter what the time zone differences are between you and the coach, you will always see their availability based on your time zone, and they will receive your appointment request reflected in their time zone.