Treestcorp

Company verification

This page collects records you can check on your own to confirm that Treestcorp is a registered business in the Republic of Korea and that we run and keep building real products. Each item notes where the public record is.

Business details

The registration number, registered name, opening date, address, and business type match the certificate below. Treestcorp is the name we use publicly. The name on our business registration is Treest (트리스트).

Company name
Treestcorp
Registered name
Treest (트리스트), as shown on the certificate
Representative
Hyeonsu Lee
Business registration no.
302-21-13750 (National Tax Service, Republic of Korea)
Tax type
General taxpayer (일반과세자)
Business opening date
January 3, 2024 (our founding date)
Time in business
2 years 9 months as of October 2026 (under 5 years)
Business address
703-A1004, 7F, 9 Gangnamseo-ro, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
Business type / items
Information and communication; professional, scientific and technical services / Application software development and supply; advertising agency
Tax office
Giheung Tax Office
Email
admin@treestcorp.com
Website
treestcorp.com (domain registered January 4, 2024)

Business registration certificate

A copy of our certificate issued by the National Tax Service. You can also confirm our registration yourself using the methods below.

Copy of the Korean business registration certificate for Treest, registration no. 302-21-13750, opened January 3, 2024, issued January 5, 2024 by the Giheung Tax Office
Issued on January 5, 2024 by the head of the Giheung Tax Office (reason for issue: change of business name). The certificate is in Korean. 이현수 is the Korean spelling of the representative's name, Hyeonsu Lee. We covered the representative's date of birth and the authenticity barcode, and added a watermark that marks the copy for posting on treestcorp.com only. We can send the original by email on request.

How to check it yourself

  • Registration status on Hometax (National Tax Service)On Hometax, open "조회/발급 > 사업자등록 상태조회" (business registration status lookup) and enter 302-21-13750. Anyone can run this lookup. The site is in Korean.hometax.go.kr
  • Domain registration datetreestcorp.com was registered on January 4, 2024, the day after the business opened. Look for the "registration" event in the public RDAP record from Verisign.rdap.verisign.com/com/v1/domain/treestcorp.com
  • Company email domainOur company email, admin@treestcorp.com, and the support address listed for Nudgy and P256, support@treestcorp.com, both use the treestcorp.com domain of this site.

Products and the company

The public pages of each product show that this company runs it.

Development activity

Nudgy launched on February 28, 2026 and has been updated 8 times since. The latest update, version 1.0.11, came out on September 27, 2026. The list below matches the version history on the App Store page.

Nudgy public version history

  • 1.0.1 : Launch
  • 1.0.2 : Profile shows study streak and sentences studied today, recent study history, word list, adjustable text size for explanations
  • 1.0.3 : FAQ for each sentence, stability fixes
  • 1.0.4 : Fixed streak and daily study count calculations, design improvements
  • 1.0.5 : More learning material, stability fixes
  • 1.0.7 : Spoken English sentence practice with real-time corrections
  • 1.0.8 : Fixed profile not updating after social login, easier to use study screen
  • 1.0.9 : Expression (pattern) lessons, new mascot
  • 1.0.11 : Typing answers with the keyboard, dark mode, choosing which sentences to review

See the release history on the Nudgy page

  1. P256 domain registered

    256personalities.com, November 30, 2024

  2. P256 development started

    Now live at 256personalities.com

  3. Nudgy launched

    February 28, 2026, version 1.0.1, on the App Store in Korea, Japan, and Taiwan

  4. 7 Nudgy updates (1.0.2 through 1.0.9)

    Including spoken sentence practice with real-time corrections in 1.0.7 (March 14) and expression pattern lessons in 1.0.9 (March 20)

  5. P256 privacy policy took effect

    May 8, 2026, naming Treestcorp as the operator

  6. Nudgy 1.0.11 update

    September 27, 2026: typing answers with the keyboard, dark mode, and choosing which sentences to review

  7. NowDeveloping an idle growth game

    New business, planned for mobile. The title and release date have not been decided.

Requesting documents

If you need the original business registration certificate without the covered fields, email us and we will send it to you.

admin@treestcorp.com
Send an email