The apps I’ve shipped under my own name since 2010, for iPhone and iPad, the Mac, and Android, plus what’s next in line for the stores.
Play your classic game files
A Game Boy, Game Boy Color and Game Boy Advance emulator for iPhone, iPad and Android, built for accuracy first. You bring your own game files; it brings a game of its own so there is something to play immediately.
Rafters, stairs and layout, exactly
A construction calculator that does feet-inch-fraction arithmetic exactly, and tells you when it cannot. Rafters, compound mitres, stair stringers, layout and materials — all worked out on the device, with no subscription.
Score & stats tracker for American Mahjong
Records the games your Mahjong group plays and keeps score for you: who won, on what hand, and who's ahead this season. Logging a win takes about a minute.
Physics sandbox particle toy
A falling sand toy. Pick a material, drag across the screen, and watch it react with whatever is already there. Record what happens and send the video to someone.
Ping, DNS & network diagnostics
Fifteen network diagnostic tools for the person everyone asks when the internet breaks. Tap once and Diagnose says whether the problem is your device, your router, your ISP, DNS, or the site itself.
Crontab editor & explainer
Type a cron expression and see what it means in plain English, when it runs next, and what might quietly break it. Converts to Quartz, Kubernetes, AWS, and more.
Markdown, code & plain text
An editor for Markdown, notes, and code. No account, nothing to set up. Files save as plain text in the Files app and iCloud Drive.
The most satisfying way to make a mess
A paint-splatter toy for canvases, photos, and one-finger mandalas. My first app, released in 2010 and rebuilt from scratch in 2026.
Menu bar stopwatch & timer for the Mac
A stopwatch and countdown timer that live in the Mac menu bar, one click or one keystroke away. Laps with splits, CSV export, and shortcuts you can make your own.
Adventure, rivals, local duels
A stick-figure brawler for iPhone. Explore a side-scrolling campaign, practice in Training, or challenge a friend on a nearby phone. The first world is free.
Hold back the endless night
A pixel-art survivor game for iPhone, iPad and Android. Move with one thumb, evolve your weapons and hold out against monster swarms in eight-minute runs.
Shape, sculpt and animate in 3D
Create 3D props, sculpt organic forms and bring scenes to life on iPhone and iPad. Model, paint and animate for free, with local projects and an optional one-time Pro upgrade.
