Web app always shows local time. If it doesn't, it means that something is misconfigured on your side.
the traccar client for mobile works well too. So my question is. there is a way to change an specific device timezone?
You should ask your device vendor. You need to configure device to report UTC time to the server.
im designing the device. but im sending the UTC time. and when i log into the app i also see the utc time. not my timezone
That's not how it works. Traccar expects UTC and converts it to local time. If you get UTC in the web app, it means that either UTC is your local time or device didn't report UTC.
Hello. i have an arduino project that send GPS position and time. all works perfectly. is there a way to visualize the actual hour whit timezone from the web? because the gps is only sending UTC. and i need it to show -4.