ChatGPT Plus is listed at $20 a month, but the actual price varies depending on...

https://aged-wiki.win/index.php/Can_the_Same_ChatGPT_Plus_Account_Have_Three_Prices_(Web,_iOS,_Android)%3F

ChatGPT Plus is listed at $20 a month, but the actual price varies depending on where you live and whether you subscribe via a web browser or an app store. This change reflects added taxes like VAT or GST, plus any extra fees that app stores charge