How many dayscould your home hold out?

You can while you have a connection. Safe-Life keeps its 314 guides on your phone, so they still open with no signal or Wi-Fi.

Water, shelf-stable food, medicine, a flashlight, batteries, first-aid supplies and copies of important documents are the usual basics. Safe-Life's go-bag checklist has 82 items to choose from and records quantities, so you can see what is packed and what is still missing.

Yes, as long as your phone has battery. The guides, go-bag, survival calendar, compass, flashlight and Morse sender all work without internet. Only the optional Shop tab loads its catalog online, and the legal pages open devrives.com in your browser.

No. Safe-Life does not receive or send emergency alerts, so keep your phone's emergency alerts turned on. It has no radio receiver either. Its "Preparing an Emergency Radio" guide, based on FEMA, says to keep a battery-powered or hand-crank radio with spare batteries, because alerts also go out over radio and TV.

It uses 4 L of water and 2,100 kcal per person per day, and each household sets its own target from 1 to 90 days. For comparison, Public Safety Canada and the European Commission recommend being self-sufficient for at least 72 hours, and Canada's guidance for water is also about 4 L per person per day.

No. The go-bag records each item and its quantity, not its expiry date, and the app sends no notifications. Its "Survival Bag Inspection Interval" guide, based on the American Red Cross, says to open your bag every six months and replace water, food and medicine that are close to expiring.

The 314 guides are the same set in Korean and English, in 4 categories: first aid, survival skills, disaster preparedness and disaster response. Most are based on government agency sources, such as the CDC, FEMA, Korea's Ministry of the Interior and Safety and the NHS, or on official military manuals. The 2.1.0 update checked 120 guides whose source was unclear or was not an official agency or professional body against official sources. The 2.2.0 update checked the remaining guides the same way. Guides were revised or removed where needed, and 29 new guides were added.

Topics include earthquakes, floods, typhoons, tornadoes, fires, power outages and civil defense alerts. The go-bag checklist and the survival-days count are not tied to one kind of disaster.

They were first written for Korea. The English guides say to call 911 or your local emergency number, and when a step gives a number that works only in Korea, such as texting 119, it says so. Most sources are US or international agencies such as the CDC and FEMA. The guides do not cover each country's local rules, so also follow local official guidance.

Yes, it is free forever, with no ads and no in-app purchases. An optional Shop tab lists Amazon products with affiliate links, and you can hide it in Settings.

There is no account or sign-up, and your go-bag and settings data stay on your device. The app contains no analytics, crash-reporting or ad SDK and needs no dangerous permissions. The flashlight never opens the camera.

Safe-Life is free on Google Play for Android 7.0 or later. An iOS version is in preparation but is not on the App Store yet. Leave your email below to hear when it launches.