Founded January 3, 2024 · Under 5 years in business
Treestcorp works mainly in education. Nudgy is an app for practicing English writing: you read a sentence in your native language and write it in English yourself. It launched on the App Store in Korea, Japan, and Taiwan in February 2026. We also run P256, a personality type web service, and as a new business we are developing a mobile idle growth game.
Business registration no. 302-21-13750 (Republic of Korea) · Opened January 3, 2024 · Yongin, Gyeonggi-do · See verification records
An iOS app for practicing English conversation through writing
The app is for Korean, Japanese, and Traditional Chinese speakers. Lessons go step by step from the verb "be" to the present perfect and cover only the grammar you need for conversation. You can also practice expressions for specific situations, such as ordering at a cafe, checking in at the airport, booking a hotel, and business meetings.
Since launching on February 28, 2026, Nudgy has shipped eight updates. The latest is version 1.0.11 (September 27, 2026). Along the way we added speaking practice with real-time correction, expression lessons, per-sentence FAQs, and dark mode.
The app is free to download. A one-time purchase gives you access with no time limit, including content added later. It is not a subscription.
P256 is a live web service about personality types. The idle growth game is a new business and is in development.
256personalities.com
Group friends, coworkers, or a fandom into a crew, collect each member's personality type, and see a relationship map of who gets along with whom. It is made for fun and has no connection to any official personality test.
Visit 256personalities.comTitle not decided yet
In this genre, the game keeps going while you are away. When you come back, you collect the rewards that built up and use them for upgrades. We plan to release it on mobile and have not set a release date yet.
Game development statusThe company name is Treestcorp, and the representative is Hyeonsu Lee. More details are on the Company page.
For questions about using our services, partnerships, investment, or press, please email us.