ChatGPT Plus has a listed price of $20 per month, but the actual cost you pay...
https://kilo-wiki.win/index.php/Why_Does_ChatGPT_Plus_Cost_More_on_Android_Than_on_the_Web%3F
ChatGPT Plus has a listed price of $20 per month, but the actual cost you pay can range from about $13 to $27 depending on your location and platform