Problem with full version

Hi
Few hours back I subscribed for an annual subscription for (24 Euros).The payment was made on my Mac book. After reading some earlier posts I went into my Android Head unit on my car and tried to restore purchases but it says " nothing to restore."…
It seems to work on my iPhone 12 Pro but when I go to my headunt it doesn’t…I hope I dont have to purchase another subscription for my android unit.Please help.

No you don’t. Just open RealDash, go to ‘Settings->User’ and enter your My RealDash credentials to activate that device.