Best App to Pair with the iPhone Action Button for Notes

Action Button + Nemos: The Fastest Capture

iPhone 15 Pro and iPhone 16 Action Button can be configured to open any app. For knowledge workers: configure the Action Button to open Nemos directly.

This creates a sub-second capture workflow: single button press from any state (including lock screen) → Nemos opens in capture mode. Speak your thought. Done.

For quick notes specifically: Action Button → Nemos voice capture is faster than any alternative. Faster than waking the phone and tapping the Notes widget. Faster than asking Siri to create a reminder. Faster than the Action Button → Voice Memos built-in option, because Nemos captures land in an organized searchable library instead of a Voice Memos folder.

Configuration: Settings → Action Button → Accessibility → Shortcut, then configure the shortcut to open Nemos.

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Where Nemos fits

Nemos is a private second brain for iPhone that solves the "I saved it somewhere" problem. Every screenshot, voice memo, PDF, and link you save gets OCR'd, transcribed, and indexed on-device using Apple Foundation Models. Find anything by typing one word. Free. Apple-only. Free on the App Store.