We make mobile apps.
Ggeomddakji is a one-person software studio that designs, develops, and publishes mobile applications for Android and iOS on Google Play and the App Store.
What we do
Android development
From planning through development and day-to-day operation of apps distributed on Google Play.
iOS development
Building apps for the Apple App Store and keeping them updated over time.
Operation and support
Bug fixes, improvements, and answering user questions — all handled directly.
Apps
Ggeomddakji — the name means something that sticks with you — builds apps that do exactly that. Simple enough to understand the moment you open them, handling only the data the service actually needs, and maintained long after launch.
- The list shows the time remaining for every alarm, like "in 9 hr 53 min" — including how much sleep you would get if you went to bed now.
- Built on the iOS alarm framework (AlarmKit), so it rings through the silent switch and Focus modes and survives a restart.
- A 12-hour time picker where you choose AM/PM yourself, per-weekday repeats, and skipping just the next one.
- Built-in alarm sounds plus your own audio from the Files app, with preview.
- Home and Lock Screen widgets, Siri Shortcuts, and Live Activities.
- Type an amount once and every selected currency converts at the same time. No switching back and forth to compare.
- 166 currencies supported, with a built-in calculator keypad.
- The latest rates are stored on device so it works offline, and the screen tells you how old the data is.
- Decimal arithmetic end to end, so there are no floating-point rounding errors.
- Convert straight from a Home Screen widget.
Both apps default to English and also support Korean, Japanese, Simplified Chinese, Spanish, and German. There are no paid features — the only in-app purchase is an optional tip to support development.
Principles
Keep it simple
A screen that needs no manual. Before adding a feature, we look for one to remove.
Keep it light
No unnecessary permissions and no data collection — only what the service actually requires.
Keep it going
Shipping is the start, not the end. Questions and bug reports turn into updates.
New releases, including Android versions, will be added to this page as they arrive.
Business information
| Business name | 껌딱지 (Ggeomddakji) |
|---|---|
| Representative | 이상훈 |
| Business registration no. | 413-21-02441 |
| Industry | Information & communications / Application software development and supply |
| Address | Republic of Korea The full address is available on request. |
| support@ggeomddakji.com | |
| Website | https://www.ggeomddakji.com |