We provide a personal monthly subscription that costs a maximum of 4.99€ or the equivalent in another currency. The price you pay is determined by the Purchasing Power Parity (PPP), which is influenced by the economic conditions of your country. If you believe that the PPP calculation is significantly unrealistic, please reach out to us.If you need a larger quantity of subscriptions for conferences, workshops, or institutes, we can offer discounts. Please get in touch with us for a price estimate.