Synthesis App is sold all over the world through Google and Apple stores in English, Spanish (Apple only), French, German, Italian.
Synthesis App price: approximately between €99 and €115 (depending on local taxes applied and currency conversions)
Synthesis App Premium price (extra features): approximately between €30 and €39 (depending on local taxes applied and currency conversions). The premium features can be purchased inside the App. You can try the features for free up to 40 times, then you will be prompted to purchase them.