Legal
FrameCalc is an educational workbench. It is not for medical, nuclear-safety, radiation-protection, or engineering sign-off. Fusion and IEC estimates are models, not device predictions.
Terms of use
FrameCalc is provided as educational software. You are responsible for checking numbers against a textbook, a derivation, or a calibrated instrument. We may change tools, grades (exact / SI / lab / toy), and pricing. Pro licenses are device-local until an account system ships; keep your receipt.
Privacy
Calculations run in your browser. History and Pro unlock flags are stored in localStorage on this device. We do not receive your kinematics inputs unless you later opt into a hosted notebook. Payment processors (Gumroad / Stripe, when configured) see their usual checkout data — not your calculator payloads.
Fusion / IEC
Fusion diagnostics are models. Child–Langmuir is planar. Bosch–Hale is a thermal ⟨σv⟩ parameterization with a published temperature interval. IEC yield is a beam-target order-of-magnitude sketch. None of these are radiation-protection, licensing, or survey-meter substitutes.