Custom Siri voice: what works on iPhone
Many people want Siri to answer like Jarvis from Iron Man, Darth Vader, Goku or in their own voice. The honest answer first: Siri speaks only in the voices Apple provides, and there is no way to install a custom or character voice for it.
What does work is a Siri shortcut that plays a clip you voiced yourself, so “Hey Siri, good morning Jarvis” gets a reply in a Jarvis-style voice. This guide shows how, and what Apple’s Personal Voice can and cannot do.
What Siri allows
In the Siri section of Settings you can pick one of Apple’s Siri voices and accents. Apple offers no way to add other voices to Siri, so characters, celebrities and custom voices are not possible for Siri’s normal answers.
Your own voice: Personal Voice
Apple’s Personal Voice, in Accessibility settings since iOS 17, creates a voice that sounds like you on newer iPhones. It is made for Live Speech, where you type and the iPhone speaks, and for some other accessibility features, but Siri still answers in its own voice.
A Jarvis reply with Shortcuts
Voice the reply on the Jarvis (ENG) page: type a line of 30 to 100 characters, such as “Good morning, sir. All systems are online.”, press Voice it and download the MP3, with no account. Save it in Files, for example in iCloud Drive, Shortcuts. In the Shortcuts app, create a shortcut with a File action that points to the clip and a Play Sound action that plays that file, and name the shortcut “Good morning Jarvis”. Now “Hey Siri, good morning Jarvis” plays the clip.
More lines, other characters
Make one shortcut per phrase: leaving home, bedtime, a timer done. The same works with Darth Vader, Goku or any catalog voice. For many clips at once, install the free engine with python -m pip install superclonica-cpu and run superclonica --text "Good morning, sir. All systems are online." --voice jarvis.json --lang en --output morning.mp3 for each line. The voices are fan-made, not the original actors, and are meant for personal fun like this.