EV Savings & Charging Log

EV Savings & Charging Log is a comprehensive, offline-first utility suite designed for owners of Electric Vehicles (EV) and Plug-in Hybrids (PHEV). Maximize your electric driving savings and understand your battery performance with 5 essential calculation modules: 1. EV Charge Time & Speed Calculator Accurately calculate how long it takes to charge from any percentage to your target. Supports Level 1, Level 2 (1-phase and 3-phase AC), and DC Fast Charging with realistic power curve tapering. 2. Home vs. Public Cost Comparator Compare the cost of charging at home (flat rate or dual-tariff off-peak) against public charging networks (Electrify America, EVgo, ChargePoint). See your monthly savings vs. gasoline. 3. Winter & Highway Range Loss Estimator Cold weather and highway speeds impact EV efficiency. Model aerodynamic drag and HVAC heating consumption to project real-world usable range in freezing conditions. 4. Dual-Tariff Charging Scheduler Optimize your charging timer to take full advantage of nighttime off-peak electric utility rates. 5. Battery Health (SOH) & Degradation Logbook Track your battery State of Health over time with an intuitive 2-parameter logbook. Estimate degradation trends and export PDF health certificates. Privacy First: All calculations run 100% on your device. No cloud logins, vehicle telemetry syncing, or account registrations required.