QuillCue is a custom keyboard app for iOS that enhances Siri AI by allowing users to save and insert prewritten prompts. After iOS 27 launched with Siri AI as its flagship feature, QuillCue addresses its limitations by enabling quick access to frequently used queries. Users can swipe down, switch to the QuillCue keyboard, select a saved prompt, and send it to Siri AI without retyping.

This is especially useful for repetitive tasks like finding laptop-friendly coffee shops. The app supports prompt organization via folders and allows importing/exporting libraries for sharing across devices. Developed by Parker Ortolani, QuillCue is free on the App Store with no ads or in-app purchases.

It requires an iPhone running iOS 27.0 or later and is currently available only in the United States. The app improves Siri AI usability by eliminating the need to re-speak or retype lengthy prompts, making it a practical tool for regular users.