What is voice-to-calendar?

Voice-to-calendar is natural-language event creation: you speak a sentence like “dentist Tuesday at 2pm in Shibuya” and a structured calendar event appears with the title, date, time, and location already parsed. Composed implements voice-to-calendar on iPhone using Apple’s on-device Speech framework and Claude event extraction.

How does voice-to-calendar work?

A voice-to-calendar app captures spoken audio, transcribes it to text, then runs the text through a language model that extracts the event fields. The model identifies the title (“dentist”), the date (“Tuesday”), the time (“2pm”), and the place (“Shibuya”), and writes them into a structured event. In Composed, transcription happens on-device via Apple’s Speech framework, and field extraction calls the parse-event edge function. The full round trip from “stop talking” to “event saved” takes roughly two seconds on a recent iPhone.

What’s the difference between voice-to-calendar and voice dictation?

Voice dictation is typing-by-voice — you say “dentist Tuesday at 2pm” and the app writes those exact characters into a text field. Voice-to-calendar is parsing-by-voice — the app understands the sentence as an event and creates the calendar entry directly, with the time block placed correctly. Siri and Google Assistant offer voice shortcuts to a separate calendar app; voice-to-calendar makes the planner itself voice-native, with no app-switching, no confirmation screens, and no manual time-field correction.

Why does voice-to-calendar matter?

Typing a calendar event takes thirty seconds across six taps: open the calendar, hit the plus button, type the title, pick the date, pick the time, pick the location. Voice-to-calendar collapses that to one sentence and one second of cleanup. For people who plan during transitions — walking to the car, leaving a meeting, picking up a kid — that delta is the difference between capturing the event and forgetting it.

Get Composed

Composed is a voice-first planner for iPhone built around this exact interaction. Download Composed on the App Store and try it free.

Related: leave-by alert · AI prep checklist · voice-first planner · screenshot-to-calendar