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Books and apps I've written and released
Aperio (Latin for "reveal") is a location-aware astronomical almanac, or ephemeris, that makes important celestial events available to you in an easy-to-browse manner.
Focus on what matters. Be Like Ike brings the Eisenhower Matrix to your iPhone and iPad using Apple Calendar and Reminders—no new accounts, no cloud lock-in. Your tasks and events stay in the apps you already use.
ElectroSpotmatic delivers manual photography on iOS with intuitive rotary controls for ISO, focus, and exposure, designed for one-handed use. Shoot photos in Standard HEIF/JPEG for easy sharing or step up to DNG RAW and ProRAW (on supported devices) for maximum editing latitude. Capture HDR video. Use the light meter mode to meter while using your film camera.
Sell in May brings institutional-grade market analysis to your iPhone—with zero cloud dependency. Combining advanced pattern recognition with optional LSTM deep learning, it reveals what history suggests about any stock's future under similar market conditions.
Sessions-AI is a private AI chat app that runs entirely on your iPhone, iPad, or Mac. No cloud servers, no account required—just choose a model, start a conversation, and keep full control of your data.
SpotmaticMagic brings advanced computational photography to any camera. Import a sequence of images from your device or Photo Library, and apply powerful, desktop-class algorithms like Focus Stacking, HDR Fusion, Astrophotography Stacking, and Motion Removal right on your iPhone, iPad, or Mac.
Technical breakdown of OpenCode, the AI coding agent built for the terminal. Architecture, implementation details, and extension points.
Deep dive into how Unsloth, the fastest LLM fine-tuning library, works. Technical exploration of optimization techniques and architecture.