The user has to buy the Synthesis App at the Google Play store or the iTunes store, as both stores request full control. Neither Zeus Soft nor its dealers can sell the Synthesis App directly.
Consequently the user has to pay the official price to the App stores.
Zeus Soft has only chosen a price category in one currency and one country.
The App stores then use a table (pricing matrix) defining the price for other countries and other currencies. Neither Zeus Soft nor its dealers have control on the prices of the Synthesis App in different countries.
Therefore the Synthesis Homeopathic App prices vary from one country to another and from one currency to another if converted according to bank exchange rates.