Free
Start with the first lessons
$0 / forever
Enough to see how Keystone teaches before you decide whether you want the full course.
- First 6 Thai lessons
- Sample sentence audio
- Sample exercises and lesson flow
Pricing
Start free. Continue with 190+ Thai lessons across the full CEFR path.
The free plan lets you try the opening lessons. Keystone Access unlocks 190+ Thai lessons across A1 to C1, along with bookmarks, review, and the same account across web and mobile.
One account. Clear pricing. No long pricing maze.
Clear CEFR path from A1 to C1
Cancel anytime
Same account on web and mobile
14-day refund on direct web purchases
Plans
Choose the version that fits how you want to study.
Start with the free lessons first. If the course works for you, monthly and yearly plans unlock the rest.
Keystone Access
Monthly
$11.99 / month
A flexible plan if you want full access without committing to a full year yet.
- 190+ Thai lessons across A1 to C1
- Bookmarks, progress, and review tools
- Manage or cancel any time
Best value
Keystone Access
Yearly
$59.99 / year
The same full course, with the lowest long-term price for steady learners.
- Everything in monthly
- Lower yearly cost than paying month by month
- Best fit if you plan to keep going
Web subscriptions are billed through Paddle. Purchases through Apple App Store or Google Play follow that store’s billing rules. Taxes may apply depending on region.
At a glance
Here is the practical difference between free and paid.
The free plan lets you try the method. Keystone Access opens the full 190+ lesson path and the tools around it.
Free
Monthly
Yearly
Lesson access
Opening lessons only
Full course
Full course
Thai course
First 6 lessons
190+ lessons
190+ lessons
Sentence audio
Sample coverage
Included
Included
Bookmarks and review
Limited
Included
Included
Billing flexibility
No payment
Cancel anytime
Lower yearly price
FAQ
The main things people ask before they pay.
Short answers, kept simple.
What does Keystone Access unlock?
It unlocks the rest of the Thai course, plus bookmarks, progress, and review tools.
Can I cancel the monthly plan anytime?
Yes. If you cancel, access continues until the current billing period ends.
What is the refund policy?
Direct web purchases can be refunded within 14 calendar days by emailing hello@keystonelanguages.com. App Store and Google Play refunds follow that store’s own rules.
Do I need one subscription for web and another for mobile?
No. The goal is one account that carries your access across the platform.
Curriculum
Want to see how the Thai course is laid out?
The curriculum page shows the path from A1.1 through C1 so you can see the course structure before you pay.
Explore Keystone
See the course path or read about Keystone.