ZoneLink vs SolarCalc

The visual, sleep-aware time-zone planner that follows your travels — free to use, no ads. ZoneLink shows every zone you care about on one scrubbable ribbon — colored by sleep, work, and awake-but-off-hours — so you can tell at a glance whether a time works for everyone, without doing the math yourself. FREE, FOREVER • Live scrubbable time-zone slider — up to 5 zones • Sleep / work / awake banding, automatic DST alerts • Ranked "best times to meet" — no more scrubbing to find a window • One-tap shareable overlap card, so the invite does the explaining for you • Jet lag tracking on your own zone — auto-detect or manual, no location data used • Biometric app lock (fingerprint or Face ID) — keep your boards private, works offline • No ads, ever ZONELINK PRO • Unlimited zones on your workbench • Unlimited saved Favorites in History — keep every group you coordinate with, color-coded and renamed your way • One-time Lifetime purchase or an Annual plan — your choice, no forced subscription New accounts also get 14 days of full Pro access (plus a 2-day grace period) to try everything unlimited before deciding. Built for remote teams, freelancers with international clients, long-distance relationships, and frequent travelers who are tired of doing time-zone math in their head. Subscriptions (Annual plan) auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://privacy.headfirstservices.com/privacy.html

SolarCalc is the ultimate professional solar energy calculator and rooftop PV feasibility tool for homeowners, solar contractors, engineers, and renewable energy enthusiasts. Determine exact solar panel requirements, battery bank storage, financial payback (ROI), and 20-year energy savings based on your local solar irradiance and monthly electricity consumption. CORE CAPABILITIES: 1. INTELLIGENT PV & BATTERY CALCULATOR - Calculate optimal solar array size (kW), panel count, and required roof space. - Accurate annual kWh generation forecasts using regional irradiation and peak sun-hour data. - Complete financial feasibility: Net installation cost, annual savings, payback timeline (years), Net Present Value (NPV), and Levelized Cost of Energy (LCOE). 2. 20-YEAR COST COMPARISON & ROI - Interactive financial comparison between staying on the grid versus going solar. - Lifetime cash-flow projections and cumulative net savings metrics. 3. SMART SYSTEM DIAGNOSTICS & UPGRADE PLANNER - Input your existing solar modules, inverter capacity, and battery storage. - Add household appliances and electric vehicle (EV) charging profiles to detect power bottlenecks and receive engineering upgrade recommendations. 4. EXPANDED SOLAR ACADEMY - Master clean energy engineering: Bifacial modules, TOPCon N-Type technology, LiFePO4 vs. Gel batteries, Hybrid inverters with EPS backup, Micro-inverters, and Surge Protection (SPD). 5. LIVE PRIVACY MODE - Keep your investment and billing figures confidential during presentations and screen sharing with a single tap. 6. PROFESSIONAL PDF PROPOSALS - Generate client-ready B2B solar feasibility reports with custom company branding and detailed technical specs. 7. EV & SOLAR INTEGRATION - Calculate solar energy needed to charge your electric vehicle and maximize fuel savings. Make confident, profitable solar investments today with SolarCalc!