I have taken up ChatGPT Pro for my personal use. I have recently been given the subscription of Gemini Pro from my office. I want to cancel my ChatGPT Pro subscription. How to do it?
Go to your phone's Settings > [your name] > Subscriptions (iPhone) or Google Play > Subscriptions (Android)
Select ChatGPT>Tap "Cancel Subscription" and confirm
Just a few additional notes - Cancelling the plan is not the same as removing the app. Unless the billing cycle is done, your pro access is still one - so even if you end the subscription today, till the end of the billing cycle - you can enjoy Pro. Also, one more - don't forget to export important data to Gemini from ChatGPT using the following Settings > Data Controls > Export
Even after you cancel your subscription to Pro, you can still use the free version. And currently, the free version has also increased the rate limits - so you are not at a loss here at all.
Go to chatgpt.com, sign in, Settings > Billing (or "Manage my subscription"), then Cancel plan. This works only if you have subscribed from the web version of ChatGPT