Pricing
Choose the plan that fits your learning journey
Start exploring for free, or unlock advanced features to dive deeper into the science behind each simulation.
TwinPendulums is built by one person — out of love for science, curiosity, and clarity. If these tools help you or your child, consider becoming a Pro member. Your $5/month helps me keep creating.
Frequently Asked Questions
Can I cancel my Pro subscription anytime?
Yes, you can cancel your subscription at any time. You'll continue to have Pro access until the end of your current billing period.
What's the difference between Free and Pro?
The Free plan gives you access to all our core simulations with basic controls. Pro unlocks advanced parameters, special modes, and additional features that let you explore the science more deeply.
Is this suitable for students and educators?
Absolutely! Our tools are designed for learners of all ages. Many educators use TwinPendulums in their classrooms, and students find the interactive approach helps them understand complex concepts.
How do I get support?
Free users can get community support through our forums. Pro members get priority email support directly from the creator.