Jay

This game originally started in Japan, and it became a big hit in Korea in 2025. It was mostly played on the web, but I wanted to bring it to mobile so people could enjoy it anywhere—without the interruptions of mid-game ads. As a fun extra, the home screen reacts to your phone’s tilt, rolling apples around. I hope you enjoy playing as much as I enjoyed making it!

A friend asked me to solve a common problem: accidentally typing in English when you meant to type in Korean, then having to delete everything and retype 😅 So I built this app to convert English keystrokes to Korean characters based on keyboard layout. After using it myself, I found it incredibly convenient and wanted to share it. I hesitated to post here since this app is primarily for Korean...

I used to struggle making thumbnail images for my blog—most tools were paid, and the free ones either lacked key features or weren't user-friendly. That's why I created Thumbnail Maker: a simple, intuitive app that lets anyone create beautiful thumbnails in seconds. I hope it helps you and many others streamline your content creation!

I was frustrated by ads interrupting my Sudoku games mid-play, so I created this app to solve that problem. While I kept strategic ads for features like unlimited hints or wrong-answer restrictions, I eliminated the disruptive ones that break your flow. I also designed a stage-based progression system with different difficulty levels to give players a sense of achievement. Though Sudoku is a...

While using a Pomodoro timer on my desk, I decided to recreate it as an app. I built a draggable time selector (up to 60 minutes) and added templates for quick adjustments. Once the core features were in place, I introduced a cute wallaby character to the timer visualization. I still use it every day and find it incredibly helpful—hope you enjoy it too!

While working long hours at my computer, I realized I wasn't taking enough breaks or drinking enough water. Though there are many hydration reminder apps for mobile, their notifications often get lost among other alerts. I wanted a dedicated desktop app for water reminders, so I built DWR. It's still new, but I use it daily and plan to keep improving it. I'd love to hear any feedback or...

I was inspired by a fantastic product with a brilliant idea and decided to create my own version. While excellent solutions already exist, I wanted to make an app that’s easy to install from the App Store. After thoroughly testing its features, I’m excited to share it with you. There’s still room for improvement, so I’d love to hear your feedback. Thanks for reading, and have a great day!

I was inspired by a fantastic product with a brilliant idea and decided to create my own version. While excellent solutions already exist, I wanted to make an app that’s easy to install from the App Store. After thoroughly testing its features, I’m excited to share it with you. There’s still room for improvement, so I’d love to hear your feedback. Thanks for reading, and have a great day!