I design and build humane interfaces -- mostly in Swift (iOS & macOS), sometimes in Rust and Python.
My work bridges HCI research, developer tools, and new ways of working with AI.

San Francisco

• Stitch -- founding engineer of Stitch, an open-source tool for designers
• Chroma-Swift -- Swift package for Chroma's on-device database engine
• TiktokenSwift -- Swift bindings for OpenAI's tiktoken via UniFFI
• Roboflow Swift SDK -- first SDK for running Roboflow-trained models on iOS
• AudioKit -- helped launch this open-source audio synthesis/analysis framework

• Visual iMessage -- what if Siri could describe images in a thread?
• Diffusion Demo -- SwiftUI interfaces for Inception Labs' model
• ASL Classifier -- detecting ASL signs on-device with CoreML

• Emulating Touche -- open-source capacitive sensing with plants & water
• O Soli Mio -- radar-powered gestural interfaces for music
• Whistlr -- contact sharing over audio on iOS
• Push-to-Talk Chat -- lightweight audio chat app
• Plus experiments with BLE sensors, CoreML sound recognition, LED control, and more (archive)

• O Soli Mio: Exploring Millimeter Wave Radar for Musical Interaction (NIME 2017)
• Investigation of the use of Multi-Touch Gestures in Music Interaction (MSc Thesis, University of York)

• Website
• Notes
• Projects
• Twitter/X

Send me a note at nicholasarner (at) gmail (dot) com, or find me on Twitter.