Pricing
Simple, transparent plans — you always know what you’re paying for. Upgrade when you need more, and cancel anytime.
Billing period
-40%
Save 40% with annual billing.
First release promo
Unlock 50% OFF before June 1
Launch offer for Plus / Pro monthly plans: secure your lower monthly rate now and keep learning for less.
Promo monthly discount50%
Lifetime discounted rate after activation
Promo code: WELCOME2026
Offer ends on June 1. After that, monthly plans return to the standard rate.
Free
$0 / month
- Unlimited catalog topics
- Misconception1× per topic
- Quick-check1× per topic
- Worked Example1× per topic
- Solve-task (AI solve + AI check)5 lifetime total
- Unlimited tests
- Unlimited saving & history
Plus
$11.99 / month
$143.93 billed annually
- Unlimited catalog topics
- Custom topics20 / month
- Explanation refinements1× per topic (shared)
- MisconceptionMultiple
- Quick-checkMultiple
- Worked ExampleMultiple
- Solve with AI20 / month
- Check your solution with AI (and explain mistakes)40 / month
- Unlimited tests
- Unlimited saving & history
Pro
$17.99 / month
$215.93 billed annually
- Unlimited catalog topics
- Unlimited custom topics
- Explanation refinements + deeper insightsMultiple
- MisconceptionMultiple
- Quick-checkMultiple
- Worked ExampleMultiple
- Worked Example difficultyAdjustable (1–10)
- Unlimited Solve with AI
- Unlimited Check your solution with AI (and explain mistakes)
- Unlimited tests
- Unlimited saving & history
Full breakdown
“Per topic” limits apply separately for each topic. “Refresh” means regenerating the result. Free solve-task limit is lifetime (shared pool). Plus monthly limits reset monthly on your subscription anchor date.
| Included | Free | Plus | Pro |
|---|---|---|---|
| Explain a topic | |||
| Catalog topics | Unlimited | Unlimited | Unlimited |
| Custom topics | Not included | 20 / month | Unlimited |
| Explanation refinements: "Explain simpler" | Not included | Shared limit: 1× per topic ("simpler" or "again") | Multiple |
| Explanation refinements: "Explain again" | Not included | Shared limit: 1× per topic ("simpler" or "again") | Multiple |
| Explanation refinements: "Go deeper" | Not included | Not included | Multiple |
| Misconception | 1× per topic no refresh | 3× per topic initial + 2 refresh | 3× per topic initial + 2 refresh |
| Quick-check | 1× per topic no refresh | 3× per topic initial + 2 refresh | 3× per topic initial + 2 refresh |
| Worked Example | 1× per topic no refresh | 3× per topic initial + 2 refresh | 3× per topic initial + 2 refresh |
| Worked Example difficulty (1–10) | Not included | Not included | Included |
| Solve a task | |||
| AI solve | 5 lifetime total shared with AI check | 20 / month | Unlimited |
| Check your solution with AI (and explain mistakes) | 5 lifetime total shared with AI solve | 40 / month | Unlimited |
| Take a test | |||
| Take a test | Unlimited | Unlimited | Unlimited |
| Saving & History | |||
| Save materials & history | Unlimited | Unlimited | Unlimited |