Vo, oficialus atsakymas...

  Hello Sir,

thank you for contacting our support center.

If you buy Sygic: GPS Navigation & Maps license you can use the 
application on up to 3 devices at the same time.
If you activate license on 4th device, the 1st one will deactivate, 5th 
activation will deactivate 2nd device, 6th activation will deactivate 
3rd device etc.
These activation/deactivation transfers are automated and unlimited.

If you have any other questions, feel free to ask again.

Thank you for understanding and have a good day.

Best regards,

P
Sygic Customer Support