# UseCOS

Startup, Worldwide.

> Free, client-side Canadian tax,mortgage, and legal calculators
>
> — in its own words, from usecos.app

- Website: https://usecos.app
- Listed since: 2026
- launched: 2026-08-26
- launch post: https://news.ycombinator.com/item?id=49451367
- hn score: 2
- domain created: 2025-11-03
- Last verified: 2026-08-26


## Sources

- Hacker News, "Show HN" — https://news.ycombinator.com/item?id=49451367, read 2026-08-26

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startup.is · https://startup.is/registry/usecos · open data: /api/v1, /llms.txt