Pricing
FrameCalc is a browser workbench for lab ↔ COM collisions, decays, and Lorentz boosts — with live plots, LaTeX copy, and labs that show conserved quantities. It refuses illegal kinematics instead of printing a wrong number. Pro turns a solved problem into a worksheet, a CSV sweep, or MATLAB / Wolfram for the same kernel.
Free
$0 / forever
- Workbench: collisions, decays, Lorentz, Compton, Doppler
- Graphical labs at teaching resolution
- Fusion diagnostics (Bosch–Hale, Child–Langmuir, labeled IEC)
- Copy as LaTeX · Natural / SI · shareable URLs
- Exact / toy badges · accuracy page
Pro
$39 / one-time
or $9 / month via Stripe when configured
- Numbered worksheet PDF (results, equations, precision)
- Batch CSV: collisions, decays, Compton, Bosch–Hale
- MATLAB / Wolfram / NumPy for the same kernel
- Course pack (10 ICs + gold checks) as JSON
- Saved notebook on this device
Software revenue funds independent IEC / fusor diagnostics and computation. The physics stays free; paid seats buy artifacts you can hand in. About · Legal