An AI English learning app that solves everything from words to sentences and speaking with short quizzes.

No need to open a book or spend a lot of time.
You can complete a session in just 3 minutes a day and become a little closer to English.

■ Today's 3-Minute Session
- The quiz starts right away when you open the app.
- It's short and easy, and the structure becomes stronger with repetition.

■ Words → Patterns → Sentences → Speaking
- You don't have to memorize words separately.
- The pattern naturally leads to sentences and speaking.
- The goal is not "knowing English," but "using English."

■ Incorrect Answer Loop for Longer Learning
- Wrong answers reappear later in the session, creating natural repetition.
- The same patterns are revisited in different contexts and expressions.

■ AI Speaking & Feedback
- The AI recognizes and evaluates sentences you speak.
- You can check your pronunciation, expression, and naturalness.

■ Worry-Free Learning Path
- Today's units and lessons are automatically linked.
- Simply press "Start Next Session."

■ Make English a Habit
- Just focus for 3 minutes a day.
- Record consecutive study days to create a daily routine.

Even a small accumulation of 3 minutes a day can lead to a big change in your English skills.

Get started with Brainkey now.

[Brainkey Plus Membership]
Brainkey is available for free.

With a free trial, your energy recharges over time, and you can use that energy to take quizzes.

Brainkey Plus Membership gives you unlimited access to quizzes and AI conversations without running out of energy.

When purchasing a membership, your subscription will automatically renew every month unless you cancel at least 24 hours before the next billing period.

You can manage or cancel your subscription at any time by going to Manage Subscriptions in the App Store under Apple ID.