ChatGPT Pro option is not available to upgrade from free accounts

ChatGPT
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On iOS and Android, ChatGPT app doesn’t have any option to upgrade from free accounts to ChatGPT Pro. The only way to upgrade is to upgrade to ChatGPT Plus then upgrade to ChatGPT Pro. So basically I need to pay for both ChatGPT Plus and ChatGPT Pro if I do it on iOS or Android.

The image shows a settings screen of an app with options like "Email," "Phone number," "Upgrade to Plus," "Customize," and more, while personal information is redacted. (Captioned by AI)
The image shows a settings screen of an app with options like "Email," "Phone number," "Upgrade to Plus," "Customize," and more, while personal information is redacted. (Captioned by AI)1812×2176 117 KB