RigCheck vs RigMaster

Your standing rigging keeps your mast up. Do you know when it was last inspected? RigCheck is the first and only app designed specifically for sailors who want to stay on top of their rigging condition.  Whether you're a weekend cruiser, an offshore passage maker, or a racing skipper — knowing the state of your rig isn't optional. It's the difference between a safe passage and a dismasting. Built by sailors, for sailors. SET UP YOUR BOAT IN MINUTES Tell RigCheck your rig type, spreader configuration, and rigging details. The app automatically generates every component on your boat — from cap shrouds and forestay to turnbuckles, toggles, swage fittings, and chainplates. Supports sloops, cutters, ketches, yawls, schooners, fractional rigs, gaff rigs, junk rigs, cat rigs, and more. Single, double, or triple spreader configurations. Multi-mast rigs with independent spreader levels per mast. INSPECT WITH CONFIDENCE Four professional-grade inspection checklists guide you through every check: - Pre-Sail Quick Check (15 items) — the essentials before every sail - Seasonal Inspection (40 items) — includes the nylon stocking test and swage magnification - Annual Deep Inspection (48 items) — dye penetrant testing, wire diameter measurement, tension readings - Post-Storm Damage Check (10 items) — focused on high-load damage after heavy weather Every checklist item tells you exactly what to look for, how to check it, and what failure looks like — the same knowledge a professional rigger uses. TRACK EVERYTHING OVER TIME This is what no other app does. Every inspection creates a permanent record. Every component — all 30 to 60 of them — tracks its own history: condition ratings, tension readings, inspection notes, and photos. Watch your rig age over the seasons. Spot the slow degradation before it becomes dangerous. Record standing rigging tension with your Loos gauge and track changes across haul-outs. A cap shroud that drops from 30 to 25 between seasons is telling you something important. VISUAL RIG DIAGRAM Tap directly on an interactive rigging diagram to inspect individual components. See your entire rig at a glance, color-coded by condition. Uses standard rigger nomenclature — V1, D1F, D1A, D2, D3 — so you speak the same language as your surveyor. PHOTO LOGBOOK WITH MARKUP Document your rigging with photos linked to specific components. Circle that hairline crack in a swage fitting. Annotate the corrosion creeping across a chainplate. Build a visual history you can reference at haul-out, share with your rigger, or present to a surveyor. KNOW YOUR RIG'S LIFESPAN RigCheck tracks install dates and material-specific lifespans for every component: - Wire rigging (1x19): 12 years - Rod rigging: 15 years - Dyneema: 8 years - PBO: 5 years - Stainless hardware: 20 years The app calculates your rig age and warns you as components approach end of life. No more guessing when to replace. RIGGING KNOWLEDGE BASE Learn what a professional rigger knows. In-app articles cover wire types, rod rigging, synthetic standing rigging, the nylon stocking test, swage fitting inspection, chainplate failures, common failure modes, replacement schedules, winter care, and insurance survey requirements. MANAGE YOUR FLEET Own multiple boats? RigCheck manages them all. Switch between boats instantly. Each boat maintains its own component inventory, inspection history, photo logbook, and tension records. COMPLETELY OFFLINE No account required. No subscription. No data leaves your device. RigCheck works at anchor, in a boatyard, or 500 miles offshore with zero connectivity. Your rigging data stays on your device, always accessible when you need it. There is no other app in the App Store that lets you systematically track your sailing rig condition over time. RigCheck gives you the tools and knowledge a professional rigger uses — in your pocket, every time you step aboard. Your rig is the most critical safety system on your boat. Check it.

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 (reduced by the choke angle) 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 • Horizontal pull per leg — the compression a spreader beam has to carry • 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/