RigThis vs RigMaster

RigThis puts professional rigging math in your pocket—built for concerts, arenas, and touring crews who need answers on the grid, not back at the office. FREE • 2-leg bridle calculator with visual diagram • Truss load distribution tool • Length and weight unit converter RIGTHAT PRO — ONE-TIME PURCHASE • Projects per show or venue • Venue specs: grid, span, load ratings • 3-leg bridle calculator • Save and recall calculation history • Send per-motor loads from the load tool into bridle math WHY RIGGERS USE IT • Inputs designed for real rigging workflows • Clear results you can verify on site • Comfortable UI for dim venues • Project data stays on your device IMPORTANT RigThat is a calculation aid only. It is not a substitute for a qualified rigger, engineer, or your venue’s approved procedures. Always verify results on site and follow local codes and company policy. Use at your own risk. Questions or feedback? Use Support in the app Settings.

RigMaster is the rigging calculator built for working riggers, crane operators, and signal persons. LIFT PLAN PDF (PRO) • Turn any calculation into a one-page lift plan: diagram, inputs, results • Room for notes and three signature lines — prepared by, signature, date • Share it straight to the supervisor from the toolbar IPAD & UNITS • Universal app — two-column layout on iPad, any orientation • Metric or imperial — kg and metres or lb and feet, switch any time • Live sling diagram with the angle and tension on every leg FREE CALCULATORS • Sling Tension — 2-leg picks by angle, or by sling length & height (the way you actually measure) • Hitch Capacity — vertical, choker, and basket capacity from YOUR sling's tag rating • Angle Reference — the tension multiplier table, always in your pocket PRO CALCULATORS • 3 & 4-leg bridles with rigid/flexible load sharing • Unequal Legs / CoG Offset — tension per leg when the center of gravity isn't centered • Load Weight Estimator — steel, concrete, aluminum and more, by shape and dimensions • Ad-free Built on first-principles trigonometry with warnings at 45° and hard alerts below 30°, following standard rigging practice (ASME B30.9 guidance). RigMaster is an estimation aid for qualified riggers. Always follow the sling tag, the load chart, and your site's rigging plan. COMMON QUESTIONS Does it work offline? Yes. Every calculation runs on the phone. No signal needed on site. Do I need an account? No. There is no login and no sign-up. What is free? Sling Tension, Hitch Capacity and the Angle Reference table are free. Pro adds 3 and 4-leg bridles, unequal legs with CoG offset, the load weight estimator and the lift plan PDF, and removes the ads. Metric or imperial? Both, switchable at any time — kg and metres, or lb and feet. Can I hand the result to the supervisor? Yes. Pro turns any calculation into a one-page lift plan PDF: diagram, inputs, results, notes and three signature lines. Does it replace the sling tag or the load chart? No. It is an estimation aid for qualified riggers. The sling tag, the load chart and your site's rigging plan always come first. Does it work on iPad? Yes. Universal app, two-column layout on iPad, any orientation. Terms of Use: https://ghapps1.wordpress.com/terms-condition/ Privacy Policy: https://ghapps1.wordpress.com/privacy-policy/