PFP Lineup
Compare favorite photos side by side, preview them in context, and create a polished profile picture with editing tools.
iOS · iPadOS
Independent software developer in Seoul
Hi, I'm Seungwoo.
I build apps, write about the process, and share the everyday life around solo software work.
ArchiveCut
A macOS app for trimming unused media from Final Cut Pro projects, events, and libraries to reclaim storage.
TypeKo
A Korean typing practice app shaped around recognition, listening, and recall.
SpeakGym
A speaking practice app for getting thoughts out clearly, then improving the next take.
Other work
More apps and open-source projects.
Calendar Insights
Visualize where your calendar time goes with groups, trends, and privacy-friendly Apple Calendar analysis.
iOS · iPadOS · macOS
Applight
A predictive Mac app switcher that learns your workflow and puts the right app first.
macOS
DayCanvas
A day planner for arranging tasks, routines, and time blocks without clutter.
iOS · iPadOS · macOS
LaunchPalette
Create organized keyboard palettes for the apps, files, projects, windows, and scripts you use on Mac.
macOS
TabBack for Safari
Switch through recent Safari tabs with a customizable shortcut and visual previews.
macOS
Pebble
A Mac menu bar timer with presets, keyboard shortcuts, and an optional floating timer.
macOS
MultiAlarm
Create fixed or custom alarm sequences quickly when one alarm is not enough.
iOS · iPadOS
Evolution
Explore natural selection through a simple interactive simulation on iPhone and iPad.
iOS · iPadOS
Hidy
Clear your Mac workspace instantly with a menu bar control or keyboard shortcut.
macOS
QuickSleep
Put your Mac to sleep immediately from the menu bar or with a dedicated shortcut.
macOS
xcode-tools
Small shell scripts that strip Xcode build and test output down to the lines worth acting on.
Open source
DictionAnki
A macOS utility for turning words from the system Oxford Dictionary into English Anki cards.
Open source
