SURVIVALOS vs PVLedger

First aid, SOS signals and outdoor preparation, ready on your phone. Use the guides and core tools without a connection. No account needed. Core emergency features stay free. WHEN YOU NEED HELP • Hold for a full-screen SOS signal with flashing light and whistle sound. • Share a location card with coordinates, elevation, accuracy and time. On supported devices, send it by text message; mobile service is required. • Follow 21 illustrated first-aid guides and share the steps as a card. Guides for life-threatening emergencies, CPR Metronome, SOS, Survival Whistle, Compass and emergency medicines are free. • Find emergency numbers for 249 countries and regions, with the local number selected using available location and region settings. MEDICINES, WITH THEIR SOURCES The Medication Guide covers 45 medicines with information from official medicine labels. Adult and child instructions are separate. It does not calculate a dose for you. Check the country and source shown: some entries use a label from another country when a local version is unavailable. A Pharmacy card shows a medicine's name, brand names and availability for supported destinations, ready to show a pharmacist. It contains no dose instructions. PREPARE BEFORE YOU GO • Share a Trip plan: where you're going, your route and when you expect to return. Local reminders prompt you to check in. Contacts are not notified automatically. • Keep a Medicine kit and receive expiry reminders 30 days before and on the expiry date, with notification permission. • Read 211 condition entries, 95 survival articles and 159 plant entries. • Use 28 tools, including GPS Coordinates, Map & Waypoints, Water Timer, Knot Guide and Supply Checklist. Some tools and library content require Pro. MADE FOR THE FIELD The Horizon sky follows the sun at your location, with automatic red light at night. The Classic tactical theme remains available. Wide windows on iPad and iPhone Duo use two panes. OFFLINE AND PRIVACY Guides, medicine labels, sun and moon calculations, GPS positions, waypoints and tracks work offline. Map imagery needs a connection. Optional Apple Weather also needs a connection and uses your location; turn it off during setup or in Me, under Settings, with the Apple Weather switch. Your kit, contacts and trip plan stay on your device unless you choose to share them. No account or advertising tracking. SURVIVALOS Pro is a one-time purchase for the full toolkit and reference libraries. No subscription. Core emergency features stay free. Medical and plant information is for reference only. It does not replace a doctor, emergency services or expert plant identification.

PVLedger is a practical offline workspace for photovoltaic system preliminary design, field calculations and project documentation. 24 OFFLINE SOLAR TOOLS • PV array power and DC/AC ratio • Cold Voc string limit • Hot Vmp and MPPT compatibility • Parallel string current • Annual and monthly energy yield • Combined system losses • Specific yield and performance ratio • Battery bank sizing and runtime • Charge controller current • DC cable voltage-drop sizing • Single-phase and three-phase AC cable sizing • PV source overcurrent protection • Roof module fit and added dead load • Row shadow spacing • Solar self-consumption • Simple payback and simplified LCOE • Avoided CO₂ estimate SOLAR PROJECT WORKSPACE Create grid-tied, hybrid or off-grid solar projects. Enter module, string, inverter and production values, then review array power, annual energy estimate, DC/AC ratio and design consistency checks. Save calculator results inside projects and keep related calculations together. REPORTS AND BACKUP • Export project reports as PDF • Export calculation data as CSV • Create and restore JSON backups • Share files through the standard iOS share sheet PRIVATE AND OFFLINE PVLedger does not require an account, login or internet connection. The app contains no advertisements, subscriptions or in-app purchases. Calculations and project data are processed and stored locally on the device. Editable regional profiles for Europe, Türkiye, the United States and China provide convenient starting values. IMPORTANT PVLedger is a preliminary engineering design and calculation aid. Results must be verified using actual site conditions, manufacturer documentation, structural requirements and applicable local electrical regulations. The app does not replace professional engineering approval or regulatory certification.