The official ChatGPT Plus price is $20 per month, but in reality, the cost can...

https://www.slideserve.com/aaron_ward92/why-does-chatgpt-plus-cost-more-on-android-than-on-the-web

The official ChatGPT Plus price is $20 per month, but in reality, the cost can vary from about $13 to $27 depending on where you buy it. This difference usually comes from taxes like VAT or GST and extra fees charged by app stores on iOS and Android