The NAVIGON app can only be used on the operation system (e.g. iOS) it was purchased for. A transmission on another platform (e.g. Android or Windows Phone) is technically not possible.
Every app is linked to your customer account (e.g. Apple ID or Google ID). NAVIGON has no access to this.
When you want to use the NAVIGON app and the in-apps on another device with a different operation system, you have to purchase it again.