Install iPhone chatGPT and shortcut app
You can install app store. Shortcut app is default app, so you may already installed.
Open shortcut app
Tap ChatGPT icon on the home.
After that, add ChatGPT shortcut.
Enable back tap
In setting, Accessibility -> Touch -> Back Tap -> Double[Triple] Tap -> Ask ChatGPT in "SHORTCUTS"
Success
You can use ChatGPT when you tap the back of the iPhone
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