JKC.

Innovation, simplified

Small, sharp tools — each built to do one thing well.

A handful of independent projects in finance, language learning and music. No clutter, no noise — just things that work.

  1. 01

    Compound Interest Calculator

    The eighth wonder of the world. Set your numbers and watch them grow.

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  2. 02

    Rosette AI

    A personal AI tutor with text-to-speech and speech-to-text for natural, two-way conversation.

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  3. 03

    Bandmate

    A band-ops platform that streamlines the admin, so you can stay focused on the music.

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