ChatGPT Plus lists at $20 per month but the final price changes depending on...

https://atomic-wiki.win/index.php/Why_Does_Google_Play_Add_Cost_to_ChatGPT_Plus_if_Google_Takes_15%25%3F

ChatGPT Plus lists at $20 per month but the final price changes depending on your country and device. Taxes like VAT or GST add to the cost, and app stores also charge a fee that can raise the price on iOS or Android