Developer Tools

A collection of useful calculators and tools for developers, investors, and crypto enthusiasts. More tools coming soon!

Calculate how your investments grow over time with compound interest. Perfect for planning long-term investments like S&P 500.

Track real-time arbitrage opportunities between Korean and international crypto markets. Monitor BTC price differences between Upbit and Binance.

A modern web application for calculating Hong Kong income tax with support for progressive/standard rates, MPF calculations, and rental deductions.

More Tools Coming Soon

I'm constantly working on new tools and calculators. Stay tuned for more useful utilities!

Coming Soon

Stay tuned

Have an idea for a useful tool or calculator? I'd love to hear your suggestions! Feel free to reach out with ideas for new utilities.