The listed ChatGPT Plus price is $20 per month, but actual costs can vary from...

https://travispyuj085.raidersfanteamshop.com/why-does-chatgpt-plus-cost-more-on-android-than-on-the-web

The listed ChatGPT Plus price is $20 per month, but actual costs can vary from $13 to $27. Differences come from factors like taxes (VAT or GST) and extra fees added by app stores