Expressions Calculator vs PrepShield

Light and very user-friendly calc for everyday use. Adopted to be super responsive on touch screens. - It can calculate math expressions with 250 digits accuracy (That's a lot!) - Currency converter (Bitcoins included) - Measurement units converter (more then 50 units) - Can calculate percents (Especially dis - Solve linear and trigonometric equation (Beta, but we are trying do the best) - Lots of mathematical functions (No free place anymore) - Full history and undo redo actions (Just in case...) - And lots of other interesting features!

PrepShield is the only preparedness app your household needs. Track emergency supplies, build bug-out bags for any scenario, store critical documents offline, and learn essential survival skills — all without ever needing an internet connection. INVENTORY MANAGEMENT Track food, water, medical supplies, gear, and ammo with smart categorization. Get expiration alerts and low-stock warnings before it's too late. Log consumption to know exactly what you're using and when to restock. Scan barcodes for quick item entry. READINESS DASHBOARD See your household preparedness score at a glance. Monitor water, food, and medical supply levels scaled to your family size. Receive seasonal alerts customized to your region — from hurricane season to winter storm prep. Get supply duration estimates so you know how long you can hold out. BUG-OUT BAG BUILDER Choose from six emergency scenarios — general evacuation, natural disaster, grid-down, winter storm, wildfire, and extended wilderness. PrepShield cross-references your actual inventory to show exactly what you have, what you're missing, and your readiness percentage. DOCUMENT VAULT Store photos of IDs, passports, insurance cards, prescriptions, birth certificates, and other critical documents. Organized into 13 categories with over 100 document types. Everything stays on your device — completely offline and private. PREP NOTES Organize your emergency plans, medical info, and preparedness knowledge in topic-based notebooks. Use the quick journal for daily thoughts. Starter prompts help you think through the plans that matter most. SURVIVAL REFERENCE LIBRARY Illustrated knot guide with step-by-step instructions. Morse code encoder, NATO phonetic alphabet, and emergency radio frequencies. Solar calculator for off-grid energy planning. Comprehensive field guides covering water purification, fire starting, shelter building, first aid, and more. EXPORT AND SHARE Export your full inventory as a CSV spreadsheet, printable checklist, or detailed report. Share with family members or print for your emergency binder. BUILT FOR PRIVACY All of your data is stored locally on your device. No accounts, no cloud, no subscriptions, no tracking. Your preparedness is personal and private.