ChatGPT Plus has a $20 list price, but what you pay can vary from about $13 to...

https://rowanscoolperspective.iamarrows.com/is-chatgpt-plus-cheaper-on-the-app-store-in-italy

ChatGPT Plus has a $20 list price, but what you pay can vary from about $13 to $27 depending on where you buy it. This happens because of taxes like VAT or GST and extra app store fees on iOS or Android