Products
Things we made and sell ourselves.
The same person who builds for clients ships these. They are how we know the work holds up.
Akari
Our own web browser for Mac and Windows: tabs in a sidebar that tucks away, a grid of favorites, tab groups, and one color for the whole window. Built on Chromium, so websites and extensions work like they do in Chrome.
Kisoku 1.6B
Our own language model, trained from scratch and released in October 2026 with its weights, code and technical report. Small enough to run offline on a laptop.
Shipped in the last few weeks. Free to try, no subscription.
Akari for iPhoneOur calm web browser on your phone, with your tabs and favorites synced from the Mac.
App StoreFree
Apps in App Review or on TestFlight right now. They ship when they are ready, not before.
Sideline
In App ReviewA pickleball scorekeeper for your iPhone and Apple Watch that knows who serves next.
Plateside
In App ReviewA strength log for 5/3/1 and 5x5 that works out your next weights and plates, on the phone or the watch.
Nomu
On TestFlightA medication tracker that knows a dose taken at 1 am belongs to the day you meant.
0alert
On TestFlightPush alerts from our own servers to a phone, with snooze, repeat and quiet hours. Built for us, being tidied for everyone.
Things built for the fun of it. They are public because the code and the craft are the point.
- 0sakai.com
A personal site you walk around in instead of scrolling: a drawn workshop with the real apps on the desk.
0sakai.com - Game Boy Advance emulator
Written from scratch in Rust, opcode by opcode. The Game Boy on the workshop bench runs on it.
github.com - MAGI
Three local language models that argue a question from three angles and hand back one decision.
github.com - Price trackers
Used-car and monitor listings scraped daily, deduplicated and scored, so a good deal is spotted the morning it appears.
track.0arch.io - No Brief
A site with no client and no brief: three small interactive pieces and a note on why they exist.
nobrief.0sakai.com - Climb for Eggs
A Roblox game: train your grip, climb, steal eggs, hatch them, get robbed.
roblox.com
Products are where we test our own ideas on real users before we suggest them to a client. Sayo is a voice-first to-do app that turns a spoken thought into tasks. 0Daily is four puzzles a day with no ads and no account. JunkZipp is a booking site and hauler app for junk removal, the same shape of system we build for service businesses. Akari is our own web browser for Mac and Windows, and Kisoku is a language model we trained from scratch. Sawhorse, for construction math, and Bidsheet, for estimates and invoices, shipped on the App Store in September, and Akari for iPhone followed at the end of the month. Sideline, for keeping score at pickleball, and Plateside, for logging lifts, are with Apple for review now.
Each one is designed, built, and supported by the same person who builds client work, which is why they double as proof: if a product holds up with strangers using it every day, the same approach holds up for your business.
Pricing follows the same shape as client work: clear tiers, no surprise gate. Sayo is free for a set number of memos a month with the full extraction pipeline, then Pro removes that limit for $9.99 a month or $49.99 a year, or as a one-time lifetime purchase. 0Daily is free for all four games and every daily puzzle, with an optional 0Daily Plus subscription for unlimited hints, the full archive, and themes. JunkZipp asks for a pickup window and photos, then gives an estimate before a truck gets dispatched, the same estimate-first flow we build into other booking systems. The new iPhone apps are free to use, with one optional purchase and no subscription: Sawhorse Pro is $19.99, Bidsheet Pro is $29.99, Plateside Pro will be $14.99, and Sideline and Akari for iPhone are free outright. None of them need an account to try, and none of them exist to pad a metrics dashboard: they are where a checkout flow, an onboarding screen, or a pricing page gets tested on strangers before the same pattern shows up in a client's system.