Monthly
USD 10.00/ 31 days
Fixed-term access to available Premium lessons. Does not renew automatically.
- Premium simulation access
- Saved learning history
Choose the access that fits.
Free simulations stay available. A reviewed payment proof activates expanded access without exposing payment-card data to this server.
Yearly
USD 20.00/ 366 days
Fixed-term access to available Premium lessons. Does not renew automatically.
- Premium simulation access
- Saved learning history
How activation works
Payment questionSubmit, review, activate.
Your proof is stored privately. An administrator reviews it and your plan is applied after approval. Unavailable lessons cannot be unlocked by a subscription.