Free axes are always free. Open the wider world with Premium.
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지구 생명
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Premium Subscription
Unlock every premium axis at once
The final amount, currency, and billing cycle are shown at Paddle checkout.
Offered monthly or annually; renews automatically until cancelled.
Axes unlocked with Premium
일본사 · 중국사 · 유럽사 · 인도 · 이슬람 · 아메리카 · 생명 · 과학 · 자연
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자연Web payments are securely processed by Paddle.com.
Subscription plans may renew automatically until cancelled.
Paddle.com acts as the Merchant of Record and handles payment, taxes, receipts, and refunds.
Per-axis purchase
You can also unlock a single topic permanently. Tap a locked axis inside Explore to see the purchase options.
Open in ExploreWhat's the difference?
| Free | Premium | |
|---|---|---|
| 4 free axes (Cosmos · Earth & Life · Human History · Korean History) | ✓ | ✓ |
| 9 premium axes (Japan, China, Europe, India, Islam, Americas, Life, Science, Nature) | — | ✓ |
| 3 difficulty levels (Easy · Normal · Hard) | ✓ | ✓ |
| Orbi the guide robot · learning points | ✓ | ✓ |
| Topic quizzes · progress · badges | ✓ | ✓ |
| New content updates | Free axes | All axes |
| Per-axis purchase (own it forever) | Available per axis | Not needed |
Frequently asked questions
Payment, billing & refunds: Paddle Buyer Support · Anything else: Contact us