PowerCost

PowerCost helps you understand where your electricity bill goes—without accounts, ads, or cloud sync. Add your appliances, set active and standby power, choose tariff zones, and get clear daily, monthly, and yearly cost estimates. Everything stays on your device.

Know your real energy drivers
• Track active power and standby (phantom) consumption for each device
• See daily, monthly, and yearly energy (kWh) and cost projections
• Spot top consumers on a clear overview dashboard
• Compare two appliances side by side to choose the cheaper option

Tariffs that match your bill
• Configure a single flat rate or time-of-use zones
• Allocate active hours to peak, off-peak, or custom zones
• Use even distribution when you do not want manual scheduling
• Store rates safely in minor currency units for precise money math

Organize your home setup
• Create, edit, duplicate, archive, and restore appliances
• Search, sort, and filter by name, cost, or power
• Mark favorites and group devices into saved scenarios
• Model a room, apartment, office, or planned upgrade

Private by design
• Fully offline—no internet permission
• No accounts, ads, analytics, or cloud sync
• Export and import versioned JSON backups with the system file picker
• Preview merge or replace before changing local data
• Duplicate-import detection and transactional restore

Built for everyday use
• Light, dark, system, and optional dynamic color themes
• Adaptive navigation for phones and wider screens
• Transparent formulas and assumptions so estimates stay explainable
• Demo data option to explore the app quickly

PowerCost is ideal for households, renters, and anyone who wants practical electricity cost estimates without giving up privacy. Results are estimates—real usage can vary with load, duty cycle, and device condition—but the math is clear, local, and under your control.

Download PowerCost and start measuring what actually drives your power bill.