Tetra is designed to feel responsive and conversational while staying within a carefully built experience.

That means children get the warmth of guided interaction without being exposed to an open-ended or unpredictable environment. 
 
There is no open internet and no unrestricted AI conversation. 
 
We do not collect children’s personal data. 

The only child-related information we store is their learning progress in TetraTales (for example, which lessons they have completed and how they are getting on). 

We never ask children to share personal details such as their full name, address, phone number, school, or any contact information or photos.

Read our Terms of Use and Privacy Policy 

For the best experience, please use:
a tablet, or 
a computer with Chrome installed.

Plans are available monthly or annually, 
for 1 child, 2 children or up to 4 children. 
You can also choose a digital-only plan or add printables.  

See current plans and prices 

Try before paying
You can try one full story free, explore several story previews, and use the 7-day free trial before your paid subscription starts.   

Why is it a subscription? 
Because real understanding builds over time. Tetra works best when children return regularly, revisit ideas, and grow their reasoning lesson by lesson. A subscription supports that kind of learning much better than one-off content. 

Cancellation
Yes, you can cancel your subscription at any time. If you cancel, your subscription will not renew. 

Refunds
During your 7-day free trial, you can try the full service. You can cancel your subscription at any time during the free trial. If you cancel before the trial ends, you will not be charged and no refund will be needed.

Once the free trial has ended and your paid subscription has started, payments are generally non-refundable. If you believe you have been charged in error, please contact us and we will review your request.
Read our Payment Terms