timo
You should consider changing such a terrible way to have cross-platform integration. The frequent questioning is not the problem you should seek to solve, you should solve WHY people are asking that questions which is that like many other I bought this assuming seemless transitions and being able to purchase the app once and be able to use the same account on my phone, laptop and desktop.
This appears not to be the case and I could not in good conscience recommend this product to anyone now that I know that. I have an iphone and use a windows pc, the idea I have to pay separately for each product is absurd and I will be requesting a refund now that I have this knowledge.