Small tools, free to try.

Things I built for my own problems and put on GitHub. Some are polished, some are slop. Pick one by where you would use it.

Projects with their own website

FitGymLog

A workout log you run from a Galaxy Fit band. Press play on the band to finish a set, feel a buzz when rest is over, load the bar by tapping plates.

Visit the site Code
QuietBuzz

Turn off vibration for every app in one tap, instead of going through them one by one. Only the apps you pick still buzz, and every notification still shows up.

Visit the site Code
Subpair

Two subtitle lines at once on Netflix and Jellyfin, with a transcript, line replay and auto-pause. A free, open alternative to Language Reactor.

Visit the site Code
Dice Roguelife

Open-source alternative to Crack, the Korean AI character chat app: a roguelike AI chat game you play on your Claude subscription, or with an API key or a self-hosted local model.

Play in Claude Run it yourself Code

All projects

AndroidMIT

FitGymLog

You came from this one

A workout log you run from a Galaxy Fit band. Press play on the band to finish a set, feel a buzz when rest is over, load the bar by tapping plates.

Try it Code
AndroidMIT

QuietBuzz

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Turn off vibration for every app in one tap, instead of going through them one by one. Only the apps you pick still buzz, and every notification still shows up.

Try it Code
AndroidGPL-3.0

KakaoTalk patches for Morphe

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Assorted KakaoTalk patches for Morphe, made from the decompiled app.

Warning: read the README before you patch. Skipping its steps can get your KakaoTalk account banned.

Read the guide first Code
WebMIT

Subpair

You came from this one

Two subtitle lines at once on Netflix and Jellyfin, with a transcript, line replay and auto-pause. A free, open alternative to Language Reactor.

Try it Code
Web

Property simulator

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Puts the same money into a Korean redevelopment unit, an apartment now, or rent plus the S&P 500, and shows what is left after taxes, loan limits and interest. Korean only.

Try it
WebDeprecatedMIT

Property Times

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LLM summaries, tags and a watch-or-skip rating for new videos from Korean real estate YouTube channels, built from subtitles pulled with yt-dlp. Archived and no longer maintained.

Code
GamesMIT

Dice Roguelife

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Open-source alternative to Crack, the Korean AI character chat app: a roguelike AI chat game you play on your Claude subscription, or with an API key or a self-hosted local model.

Play in Claude Run it yourself Code
ClaudeMIT

Language mistake tracker

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Turns the corrections Claude gives you in chat into a review sheet: your most common mistakes, repeated habits and rules with memory tricks.

Install Code
ClaudeMIT

Side Insights

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A side panel for Claude Code. Checks every question got answered, walks through the logic of changed code, and shows tool calls live.

Install Code
PCMIT

NanaZip auto encoding

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Windows right-click menus that extract with NanaZip and pick the file name encoding for you, so Japanese ZIPs stop coming out garbled.

Install Code
PCMIT

subsync-repair

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Fixes subtitles whose timing drifts in pieces by aligning them to a subtitle in another language. Command line, Bazarr hook, and a local server.

Code
ToolsGPL-3.0

otpauth-to-2fas

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Moves your codes from OTP Auth on iOS to 2FAS or Aegis in one step, by decrypting the backup into an Aegis vault. No QR codes one by one.

Code