Small, exact software.
Exact9 is an independent studio. We build focused apps and tools, shipped as fast, installable web apps — no accounts, no tracking, your data stays on your device. Eight ideas in the works at any time; the ninth is the one that ships.
Kin
A workout tracker. 873 exercises, routines, rest timer, progress — all on your device.
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Koyomi
A market seasonality almanac. How each month has historically treated the majors.
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Marco’s Library
A reading journal and home library for one reader. Bilingual, scan a book to add it.
write →Say hello
Ideas, questions, bug reports — one inbox, read by a human.
The studio
Exact9 is run by one developer. Every app starts as a real, personal need — then gets built exactly: no accounts to create, no data leaving your device, no ads, nothing that phones home. The web installs it and the web keeps it updated.
If something is broken or missing, write to hello@exact9.com — it lands in the queue for the next release.