A network of free tools and reading
Calculators, chart analysis and games that work the moment they open in your browser, plus articles on everyday life and money — gathered in one place.
What's here
281 tools
Each tool lives on its own subdomain. The core is live crypto and stock chart analysis that keeps itself updated while open; alongside it are finance calculators, personality tests, games and converters.
Keyword articles
From chart-reading lessons to life tips, money, travel and structural notes on dramas and anime, organised by topic. Browse them all in the Keyword Wiki.
Four languages
Pages are available in Korean, English, Japanese and Simplified Chinese. Where a translation doesn't exist yet, English is shown, and Korean if there is no English either. Switch with the language buttons at the top or with ?lang= in the address.
How data is handled
- Inputs stay on your device. Values you enter into calculators and games are computed in your browser and not sent to the server.
- Favourites and recent tools are kept only in your browser's localStorage.
- Market data: crypto prices come straight from exchanges' public APIs to your browser; stock prices are fetched from public data by this site's server and served from a shared cache. Values are shown as received — no made-up numbers.
- See the privacy policy for details.
Principles
- No sign-up. Every tool works the moment it opens.
- Estimates, not advice. Results come from general formulas, are for reference and are not investment advice.
- Funded by advertising. Google AdSense ads keep everything free.
About the work pages
Articles on dramas and animation are unofficial fan-written structural commentary. They do not reproduce plots, quote dialogue or display images. Rights holders can reach us through the contact page; requests are handled promptly.