The original official Iron Man 3: J.A.R.V.I.S. - A Second Screen Experience
The Long Answer (For Enthusiasts): The app has been delisted since approximately 2015. Marvel’s licensing agreement for the interactive theater features expired, and the developer did not update it to 64-bit.
The JARVIS app, inspired by the fictional AI assistant from the Iron Man series, is not directly available for download as an official app. However, there are several third-party apps and home automation systems that offer JARVIS-like functionality.
If you click an old link, iTunes will say: "The item you've requested is not currently available in the US store." This is permanent for new downloads.
JARVIS App for iOS: A Recreation
What is JARVIS?
For now, Marvel fans must rely on memory—or just ask Siri to “act like JARVIS” for a smile.