Arvee AmpSmart vs Knot Now

Understand your RV electrical system with Arvee AmpSmart — the most comprehensive free RV power calculator available. Whether you're plugged in at a campground, dry camping off-grid, or planning a battery and solar upgrade, AmpSmart helps you make informed decisions about your RV's electrical system. THREE CALCULATION FLOWS: Shore Power Check — Will running these appliances trip my breaker? - Analyze 15A, 20A, 30A, and 50A hookups - See total load vs. available capacity at a glance - Get warnings for overloads, surge/startup risks, and the 80% continuous load rule - Understand shared circuit limitations on household outlets Off-Grid Power Budget — How long can I last on battery and solar? - Model your battery bank by chemistry (Flooded Lead-Acid, AGM, LiFePO4) with accurate depth-of-discharge and efficiency factors - Add solar panels with location and season-based peak sun hour presets - Factor in generator support, inverter efficiency, and cold weather derating - See daily consumption breakdowns, endurance estimates, and solar balance System Builder — What battery, solar, and inverter setup do I need? - Set your off-grid goal (days between charges) and let AmpSmart size the system - Compare battery chemistries side by side (capacity, cost, weight, lifespan) - Get solar, inverter, and charge controller recommendations for your location - Enter your existing system to see exactly where it falls short REAL-WORLD RV APPLIANCE LIBRARY: - 37 curated presets with practical power values (A/C, microwave, fridge, CPAP, Starlink, and more) - Three usage modes per appliance: hours/day, minutes/day, or duty cycle % - Add custom appliances for anything not in the library - Surge/startup wattage tracked separately for compressor-based loads LEARN AS YOU GO: - Contextual help articles at every step explain watts, amps, battery chemistry, solar peak sun hours, inverter efficiency, and more - Built for RVers who want to understand their system, not just get a number SHAREABLE REPORTS: - Generate a branded Power Profile Report from any calculation - Share with others or download as a file FREE & PRIVATE: - Completely free — no ads, no in-app purchases, no paywalls - No account required — just open and calculate - No personal data collected — your information stays on your device - Works offline — no internet connection needed - Available on iPhone, iPad, and Mac Made with care by Arvee — the RV trip planning platform that helps RVers stay connected with friends on the road.

Knot Now is an offline field guide to 225 knots, animated in 3D, with step-by-step lessons you can follow at your own pace. BROWSE BY REAL-WORLD USE Knots are organized into camping, climbing, boating, fishing, rescue, arborist, pioneering, decorative, and rope care, plus a curated Essentials set of the eight knots worth learning first. Search by name, use, or classic reference number (ABoK). LEARN STEP BY STEP Every knot has a slow, scrubbable 3D animation you can rotate, zoom, and play back at 0.5x-2x speed, paired with plain-language steps. Jump a step at a time, or drag the timeline to any point in the tie. KNOW THE TRADEOFFS Each knot lists what it is good for, its strengths, and what to watch out for, plus a one-tap comparison against a similar alternative for when two knots do almost the same job. CAST TO A BIGGER SCREEN Send any lesson to a nearby TV or Mac over AirPlay. The lesson video is generated on your device — nothing is uploaded anywhere. TRACK YOUR OWN PROGRESS Mark knots as favorites, add them to a practice list, or mark them mastered, and keep field notes on any knot. Everything stays on your device. Knot Now works fully offline. No account, no sign-in, and no network connection required. For any knot used in climbing, rescue, arborist work, or another life-safety context, verify the finished knot and technique with a qualified instructor. The animations are a learning aid, not a substitute for training.