Chart standing · US
What changed · US
Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.
Price & rating history · US
Reconstructed from the listing changes AppTracker has observed in this storefront, so each line starts at the first change on record.
Price · USD
About
Wattmargin is a private backup-power planning workbench for deciding what you intend to run before an outage begins. Build a load list from equipment labels and manuals, choose must-run and rotating appliances, enter duty cycles, and compare running watts, worst startup demand, and estimated daily energy against a generator, battery power station, or inverter. Runtime estimates help reveal tradeoffs before the household is operating under pressure. KEY FEATURES - Generator, battery station, and inverter profiles - Continuous and surge-watt margins - Daily watt-hour planning with duty cycles - Conservative single-load startup analysis - Battery and generator runtime estimates - Must-run, rotating, and optional priorities - Circuit directory and readiness checklist - Local PDF outage plan - Offline field-reference guide - No account, ads, tracking, analytics, subscription, or network requirement Wattmargin is an estimation and planning tool. Actual demand and runtime vary with equipment, temperature, age, fuel, wiring, and operating conditions. Never connect a generator directly to building wiring or a receptacle. Follow manufacturer instructions and use a licensed electrician for transfer equipment or fixed wiring.
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