SiteCalc vs HoodDown

Professional construction calculators for electricians, roofers, carpenters, concrete and paving contractors, HVAC techs, plumbers, masons, painters, floor layers, solar installers, fencers — and the foundations, drywall and business numbers behind every job. Built for tradespeople who need accurate, fast, offline calculations on the job site. No account needed. Calculators work with no internet. FREE IN EVERY TRADE Every trade includes a starter set of full calculators, free forever — try real tools in your own trade before you pay anything. SMART TOOLS • AR Measure: tap point-to-point distances with your camera, no tape needed • Room Scan: capture a room with LiDAR and turn it into instant dimensions • Site Level: use your phone as a digital level and angle finder • Tape Calculator with saved tapes for running totals • Cost Book and reusable estimate templates ELECTRICAL • Voltage drop (NEC / BS 7671 / IEC), wire gauge with temperature and bundling corrections, conduit fill, residential load per NEC 220, ampacity lookup, motor circuit sizing BUSINESS • CAGR, APR, APY, depreciation, future value, loan and lease; cost per square foot, gross pay, effective interest • Project dates: countdowns, days overdue, work days, completion estimates, staffing ROOFING • Pitch converter, roof area (gable, hip, shed, flat), material estimator, rafter length with birdsmouth, common rafters, hip ridge CONCRETE • Volume for slabs, footings, columns and steps, bag estimator, rebar spacing and weight, slab-on-grade CARPENTRY • Board feet, stair layout (2R+T), deck boards, crown angles, plywood, floor joists, subfloor, insulation, ramps, balusters HVAC • BTU load (simplified Manual J), duct sizing, CFM by room, refrigerant charge, fan sizing, attic ventilation, window AC PLUMBING • Pipe sizing, DWV, water heater sizing, drain slope FOUNDATIONS • Footings, columns, slabs, excavation and backfill, grading, squaring, rebar MASONRY • Block walls, core fill, brick, mortar, masonry units, stone retaining walls DRYWALL • Sheets, mud, tape, screws, metal-stud framing PAINTING • Paint gallons, primer, trim, spray coverage, labour FLOORING • Tile, plank, underlayment, grout, transitions PAVING • Asphalt, asphalt parking areas, crushed stone driveways, sealer SOLAR / PV • PV array, string sizing, voltage drop, setbacks FENCING • Posts, rails, pickets, gates, post-hole concrete FEATURES • Calculators work completely offline — no internet required • Supports US (NEC), UK (BS 7671) and EU (IEC) standards • Imperial and metric with instant conversion • Save calculations to history with job names • Export professional PDF reports • Dark mode and large touch targets for gloved hands on site • VoiceOver accessible, Siri shortcuts and widgets PRICING A starter set of calculators in every trade is free forever — no account, no subscription. Own your tools with one-time purchases — no subscription required for calculators: • Trade packs — five bundles grouped by jobsite: Systems (Electrical, Plumbing, HVAC), Structure (Concrete, Foundations, Masonry), Framing & Roofing (Carpentry, Roofing, Solar), Finishes (Drywall, Painting, Flooring), Sitework & Business (Paving, Fencing, Business) • All Trades — every calculator in a single purchase • Power Tools — AR Measure, Room Scan, Site Level, Cost Book and templates, plus unlimited notes and PDF export • Pro Lifetime — every calculator and every power tool, owned outright forever SiteCalc Pro (monthly or yearly, with a 7-day free trial) adds the cloud: iCloud sync across your devices, Crew project sharing, cloud backup for photos, voice notes and scans, new code-edition updates, and Family Sharing — and includes every calculator and power tool while active. If a subscription lapses, you keep everything you bought outright. TERMS OF USE You can find EULA terms of use here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

You know the feeling. You've got the metal, the rod, the motivation — and absolutely zero idea what voltage to set. So you wing it, strike an arc, and produce something that looks like a seagull walked across hot tar. Hood Down fixes that. Tell it your process, your material, and how thick the metal is. It spits back the voltage, amperage, wire feed speed, and gas flow you actually need. In seconds. No chart hunting, no forum rabbit holes, no third-degree burns from touching the wrong thing. WHAT'S INSIDE - MIG, TIG, Stick, and Flux-core — all covered - Mild steel, stainless, aluminum — pick your poison - Wire diameter, rod size, and TIG cup size recommendations included - Flags sketchy combos before you do something you'll regret - Save your best setups so you're never starting from zero again - Built-in troubleshoot tips for when the bead looks angry - Imperial and metric — wherever you're from HONEST ABOUT WHAT IT IS Hood Down gives you a solid starting point. From there, you dial it in like the welder you are. Every machine runs a little different. This gets you close, fast. FREE. FOR REAL. No ads. No premium tier. No subscription to unlock "advanced processes." Welding gear already cleaned out your wallet — the app shouldn't. Put your hood down. Make something. QUESTIONS OR FEEDBACK? We know the app is not perfect but with your help we can make it better. Find us on Facebook or drop an email to blah@helstad.eu — real humans, real responses.