Services

• Main service
• Live

An iOS app for practicing conversation by reading a sentence in your native language and writing it in English yourself.

Nudgy is made for Korean, Japanese, and Traditional Chinese speakers and launched on the App Store in Korea, Japan, and Taiwan on February 28, 2026. 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.

• Writing practice: read a sentence in your native language and write it in English, with native speaker audio and notes on sentence structure (answers can be typed on the keyboard since 1.0.11)
• Say an English sentence out loud and get corrections in real time (added in 1.0.7)
• Expression lessons that teach English expressions through pattern sentences (added in 1.0.9)
• Ask the AI tutor when you get stuck (why an expression is used, whether your sentence sounds natural, other ways to say it)
• Step-by-step lessons on only the grammar you need for conversation, from the verb "be" to the present perfect, plus practice for specific situations
• Automatic review scheduling with the FSRS spaced repetition algorithm, and a list of review sentences you can manage yourself (1.0.11)
• Word list, study streak and recent history, dark mode, and progress synced across devices through your account

Since launch we have shipped 8 updates, up to version 1.0.11 on September 27, 2026. The expression notes, per-sentence FAQs, user guide, and pattern sentences are generated with Claude, reviewed by us, and provided in Korean, Japanese, and Traditional Chinese.

• Live

A web service that collects the personality types of a group's members and shows their compatibility on a relationship map.

You set up a group of friends, coworkers, or fans as a crew. P256 then shows on a relationship map who in the crew gets along with whom. We registered the domain in November 2024 and started development in December 2024.

• Create a crew and invite people with a link
• See compatibility between members on a relationship map
• Browse popular crews or create a new one

The site's privacy policy (effective May 8, 2026) names Treestcorp as the operator and support@treestcorp.com as the contact.

P256 is meant for fun and is not a tool for judging people. It is not affiliated with any official personality test.

Visit 256personalities.com

• In development

A mobile game we are developing as a new business. The game keeps progressing while you are away, and when you come back you collect the rewards that have built up and use them for upgrades. We have not decided on a title, release date, or release regions yet.

Read about the game