# Grid Survivor > Offline survival app: offline maps and routes, a compass to the next waypoint, a searchable survival guide with over 100 articles, a family meeting-point plan, a 72-hour kit checklist and phone-to-phone sharing. Everything works with no signal, no data and no account. Grid Survivor is a paid mobile app (iPhone and Android, one-off purchase of £4.99, no subscription) made by Marangoni Junior Limited. Everything works offline after the first download: maps and routes, a compass to the next waypoint ("breath mode"), a searchable survival guide, a family meeting-point plan, a 72-hour emergency kit checklist and phone-to-phone sharing by QR or AirDrop / Quick Share. There are no accounts, no ads and no tracking; location never leaves the phone. ## Key pages - [Home](https://gridsurvivor.app/): what the app does, features, FAQ - [Survival guide](https://gridsurvivor.app/guide): 110 free articles - [Full guide text](https://gridsurvivor.app/llms-full.txt): every guide article in one plain-text file - [72-hour kit checklist (PDF)](https://gridsurvivor.app/kit-checklist.pdf) - [Privacy](https://gridsurvivor.app/privacy) - [Support](https://gridsurvivor.app/support): contact@marangonijunior.co.uk ## FAQ - **Does it really work with no signal?** Yes. GPS satellites don't need a mobile network, and the maps, guide and plan are stored on the phone. Nothing in the app needs the internet after setup. - **How long will my battery last?** In rest mode the app wakes the GPS once an hour. Breath mode uses a black screen and no map rendering. Most phones get days, not hours. - **Is there a subscription?** No. £4.99 once, from the App Store or Google Play. No account, no login, no renewals. Guide and map updates are free. - **Which regions are covered?** Download the map for any region you need. The survival guide is written for anywhere in the world and keeps growing with free updates. - **What's in the survival guide?** Over 100 plain-English articles: finding and purifying water, lighting a fire, shelter and staying warm, foraging safely, first aid (CPR, bleeding, burns, hypothermia and more), navigation without a phone, signalling for rescue, weather, and what to do in floods, wildfires, earthquakes, storms and long power cuts. - **Does the app track me or collect my data?** No. Your location, routes, plans and contacts never leave your phone. There are no accounts, no ads and no tracking. The only optional network feature is signing up for update emails. - **Which phones does it run on?** iPhone (iOS 16 or later) and Android (Android 10 or later). - **Can I share the plan with my family?** Yes. Share meeting points, routes, waypoints and your contact card phone to phone by QR code or AirDrop / Quick Share. It works without a network and nothing goes through a server. ## Guide: First steps - [Building a pocket survival kit](https://gridsurvivor.app/guide/pocket-survival-kit): A small kit you always carry is worth far more than a big one left at home. Aim for something that fits in a pocket or… - [Should you stay put or move?](https://gridsurvivor.app/guide/stay-or-go): Deciding whether to stay where you are or try to walk out is one of the biggest choices you'll make. In most cases,… - [Staying calm and keeping morale up](https://gridsurvivor.app/guide/staying-calm): Fear is normal in an emergency. It can sharpen you, but unchecked panic leads to rushed, risky decisions. Your state… - [STOP: Stop, Think, Observe, Plan](https://gridsurvivor.app/guide/stop-method): The moment you realise you're lost or in trouble is when people make their worst decisions. STOP is a simple way to… - [The rule of threes](https://gridsurvivor.app/guide/rule-of-threes): When everything feels urgent, the rule of threes helps you decide what to deal with first. It's a rough guide to how… - [Your first hours in an emergency](https://gridsurvivor.app/guide/first-hours-priorities): What you do in the first few hours sets up everything that follows. Work through these steps in order, and don't skip… ## Guide: Water - [Collecting rainwater and dew](https://gridsurvivor.app/guide/collecting-rainwater-and-dew): Rain and dew can give you water when there's no stream or tap nearby. With a few simple materials you can collect a… - [Finding water](https://gridsurvivor.app/guide/finding-water): Water is easier to find if you know how land, plants and animals give it away. Whatever you find, treat it before… - [How much water you need](https://gridsurvivor.app/guide/how-much-water): Knowing how much water you need helps you plan, ration sensibly and spot trouble early. Most people need more than… - [Making water safe to drink](https://gridsurvivor.app/guide/purifying-water): Water from streams, rivers and rain butts can carry germs you can't see. Treat it before you drink it, even if it… - [Solar disinfection (SODIS)](https://gridsurvivor.app/guide/solar-disinfection): If you have clear plastic bottles and sunshine, you can make water safer to drink without fuel or chemicals. This… - [Spotting and treating dehydration](https://gridsurvivor.app/guide/signs-of-dehydration): Dehydration creeps up slowly and clouds your thinking, so you may not notice it in yourself. Learn the signs and check… - [Storing water at home](https://gridsurvivor.app/guide/storing-water-at-home): If the taps stop working, stored water lets you sit things out safely at home. It's one of the simplest and most… - [Why you must never drink seawater or urine](https://gridsurvivor.app/guide/never-drink-seawater-or-urine): When you're desperately thirsty, seawater and urine can seem like an option. They're not. Both make dehydration worse… ## Guide: Fire - [Choosing a safe fire site](https://gridsurvivor.app/guide/choosing-a-safe-fire-site): A fire in the wrong place can get out of control, damage the ground or hurt people. A few minutes choosing a good spot… - [Lighting a fire in wet weather](https://gridsurvivor.app/guide/fire-in-wet-weather): Getting a fire going in the rain is one of the hardest outdoor skills, but also one of the most valuable. Wet… - [Lighting a fire with matches or a lighter](https://gridsurvivor.app/guide/lighting-a-fire-with-matches-or-lighter): Matches and lighters are the easiest way to start a fire, but a single match only burns for a few seconds. Preparing… - [Making fire with a bow drill](https://gridsurvivor.app/guide/bow-drill): The bow drill makes fire using friction. It's hard work and takes practice, but it needs only wood, a cord and some… - [Putting out a campfire](https://gridsurvivor.app/guide/putting-out-a-fire): A campfire that looks dead can still hide embers hot enough to start a wildfire hours later. Putting it out properly… - [The fire triangle](https://gridsurvivor.app/guide/fire-triangle): Every fire needs three things: heat, fuel and oxygen. Understanding this simple idea helps you light a fire when it's… - [Tinder, kindling and fuel](https://gridsurvivor.app/guide/tinder-kindling-fuel): A good fire is built in stages, from tiny material that catches a spark up to logs that burn for hours. Gather… - [Using a ferro rod](https://gridsurvivor.app/guide/ferro-rod): A ferro rod ferrocerium rod throws a shower of very hot sparks when scraped. It works when wet, in the cold and at… ## Guide: Shelter and warmth - [Building a debris shelter](https://gridsurvivor.app/guide/debris-shelter): A debris shelter uses branches and dead leaves to make a small, insulated hut. It takes effort, but it can keep you… - [Building a tarp shelter](https://gridsurvivor.app/guide/tarp-shelter): A tarp is one of the most useful things you can carry. With some cord, it becomes a dry roof in a few minutes. What… - [Choosing a shelter site](https://gridsurvivor.app/guide/choosing-a-shelter-site): Where you put your shelter matters as much as how you build it. A good spot keeps you drier, warmer and safer, and… - [Dressing in layers](https://gridsurvivor.app/guide/dressing-in-layers): Your clothes are your first shelter. Wearing several thin layers, rather than one thick one, lets you stay warm… - [Finding shelter in a town or city](https://gridsurvivor.app/guide/urban-shelter): After a storm, flood, earthquake or long power cut, your home or the buildings around you may not be safe or warm.… - [Making a snow shelter](https://gridsurvivor.app/guide/snow-shelter): Snow is a surprisingly good insulator. Inside a well built snow shelter, the temperature can stay near freezing even… - [Sleeping without a sleeping bag](https://gridsurvivor.app/guide/sleeping-without-a-sleeping-bag): A cold night without a sleeping bag is uncomfortable but usually survivable if you prepare well. The biggest heat loss… - [Staying dry](https://gridsurvivor.app/guide/staying-dry): Wet clothes can lose most of their insulation and pull heat from your body many times faster than dry ones. Staying… - [Using a car as shelter](https://gridsurvivor.app/guide/using-a-car-as-shelter): If you are stranded in a car in snow or a storm, staying with the car is usually the safest choice. It keeps you out… ## Guide: Food and plants - [Basic fishing](https://gridsurvivor.app/guide/basic-fishing): Fishing can provide good protein and fat, but it takes patience. Fishing is regulated in many places, often needing a… - [Common edible wild plants](https://gridsurvivor.app/guide/common-edible-plants): A few wild plants are widespread across temperate regions and fairly easy to recognise. They won't give you many… - [Cooking without power](https://gridsurvivor.app/guide/cooking-without-power): In a power cut, you can still make hot meals and drinks. The most important rule is to keep fumes and flames outside,… - [Deadly plant look-alikes](https://gridsurvivor.app/guide/deadly-plant-look-alikes): Some of the most poisonous plants in temperate regions look a lot like common edible ones. Knowing these pairs is the… - [Eating insects](https://gridsurvivor.app/guide/edible-insects): Insects are eaten every day by billions of people. They are rich in protein and fat, common and easy to catch, which… - [Food safety after a power cut](https://gridsurvivor.app/guide/food-safety-after-a-power-cut): When the power goes off, food in your fridge and freezer starts to warm up. Knowing what to keep and what to throw… - [Foraging safely](https://gridsurvivor.app/guide/foraging-safety-rules): Wild plants can add vitamins and variety to your food, but a single mistake can make you very ill or kill you. The… - [How much food you need](https://gridsurvivor.app/guide/how-much-food-you-need): Knowing roughly how much food a person needs helps you plan a store and make supplies last. You don't need to be… - [Rationing food](https://gridsurvivor.app/guide/rationing-food): If supplies are limited and you don't know how long you'll have to wait, rationing helps your food last. Done… - [Recognising deadly mushrooms](https://gridsurvivor.app/guide/deadly-mushrooms): This guide does not teach you to pick mushrooms for eating. Identifying edible mushrooms safely takes years of expert… - [Simple traps](https://gridsurvivor.app/guide/simple-traps): Trapping can provide food, but it is heavily regulated. In many places, snares and many other traps are illegal, and… - [Storing emergency food](https://gridsurvivor.app/guide/storing-food): A good food store means you can stay at home safely during storms, illness or disruption. The aim is to keep food you… - [Why not to taste-test unknown plants](https://gridsurvivor.app/guide/why-not-to-taste-test-unknown-plants): Some survival books describe a "universal edibility test" where you touch, then taste, then eat small amounts of an… - [Wild nuts and berries](https://gridsurvivor.app/guide/wild-nuts-and-berries): Nuts and berries are among the easier wild foods to find, and nuts are rich in calories. But several poisonous berries… ## Guide: First aid - [Blisters](https://gridsurvivor.app/guide/blisters): Blisters are caused by friction, usually from shoes or tools rubbing on the skin. They normally heal on their own in a… - [Broken bones and splints](https://gridsurvivor.app/guide/broken-bones-and-splints): A broken bone fracture may cause pain, swelling, bruising, an odd shape or angle, or an inability to use the limb. If… - [Burns and scalds](https://gridsurvivor.app/guide/burns): Cool a burn with cool running water as quickly as possible — it reduces damage even if you start a little late. Call… - [Checking an injured person](https://gridsurvivor.app/guide/check-the-casualty): When you find someone hurt or collapsed, a quick, calm check tells you what matters most. If they are unresponsive or… - [Choking](https://gridsurvivor.app/guide/choking): Someone who is choking may clutch their throat, be unable to speak, cough or breathe, or turn blue. If they can cough,… - [Cleaning cuts and preventing infection](https://gridsurvivor.app/guide/cleaning-cuts-and-preventing-infection): Most small cuts and grazes heal well if you clean them properly and keep them covered. When medical help is hard to… - [CPR (cardiopulmonary resuscitation)](https://gridsurvivor.app/guide/cpr): If someone is unresponsive and not breathing normally, their heart has probably stopped. Call your local emergency… - [Diarrhoea and rehydration](https://gridsurvivor.app/guide/diarrhoea-and-rehydration): Diarrhoea is common after drinking unsafe water or eating contaminated food. The biggest danger is losing too much… - [Drowning](https://gridsurvivor.app/guide/drowning): A drowning person often can't shout or wave — they may just bob silently with their head low in the water. Call your… - [Emergency childbirth](https://gridsurvivor.app/guide/emergency-childbirth): Most babies are born safely without help, and your job is mainly to keep mother and baby warm, calm and clean. Call… - [Frostbite](https://gridsurvivor.app/guide/frostbite): Frostbite is when skin and the tissue beneath it freeze, usually on the fingers, toes, nose, ears and cheeks. Anyone… - [Head injuries](https://gridsurvivor.app/guide/head-injury): Most bumps to the head are minor, but some cause bleeding or swelling inside the skull that can become serious over… - [Heat exhaustion and heatstroke](https://gridsurvivor.app/guide/heat-exhaustion-and-heatstroke): Heat exhaustion is a warning that the body is struggling to stay cool. Heatstroke is a medical emergency: the body has… - [Hypothermia](https://gridsurvivor.app/guide/hypothermia): Hypothermia happens when the body loses heat faster than it can make it. Wind, rain, cold water and exhaustion all… - [Mental health crisis](https://gridsurvivor.app/guide/mental-health-crisis): Disasters, loss and isolation can overwhelm anyone. A mental health crisis might look like panic, deep despair,… - [Shock](https://gridsurvivor.app/guide/shock): Shock is a life threatening condition where not enough blood reaches the vital organs. It is often caused by heavy… - [Snake bites](https://gridsurvivor.app/guide/snake-bites): Most snake bites are not deadly, and many bites inject little or no venom, but you can't tell at first. Treat every… - [Sprains and strains](https://gridsurvivor.app/guide/sprains-and-strains): A sprain is a stretched or torn ligament around a joint, often an ankle, knee or wrist. A strain is an overstretched… - [Stings and severe allergic reactions](https://gridsurvivor.app/guide/stings-and-severe-allergic-reaction): Most insect stings cause only local pain and swelling. But a severe allergic reaction anaphylaxis can kill within… - [Stopping heavy bleeding](https://gridsurvivor.app/guide/stop-bleeding): If you can, call your local emergency number first, or ask someone else to. 112 works in Europe and many other… - [The recovery position](https://gridsurvivor.app/guide/recovery-position): Use the recovery position for someone who is unresponsive but breathing normally. It keeps the airway open and lets… - [Using a tourniquet](https://gridsurvivor.app/guide/tourniquet): A tourniquet is a last resort for life threatening bleeding from an arm or leg that firm direct pressure cannot… ## Guide: Navigation - [Finding north with the stars](https://gridsurvivor.app/guide/finding-north-with-the-stars): On a clear night, the stars can give you a more accurate direction than the sun. Which stars you use depends on… - [Finding north with the sun](https://gridsurvivor.app/guide/finding-north-with-the-sun): If your compass is lost or your phone is flat, the sun can still give you a rough direction. These methods are less… - [Map scale and measuring distance](https://gridsurvivor.app/guide/map-scale-and-distance): Knowing how far you have to go helps you decide whether to push on, rest or turn back. The map scale tells you how… - [Moving safely at night](https://gridsurvivor.app/guide/moving-safely-at-night): Travelling in the dark is slower and riskier, so it's usually best to stop and wait for daylight. Sometimes, though,… - [Pacing and estimating distance](https://gridsurvivor.app/guide/pacing-and-estimating-distance): Knowing how far you have walked helps you find where you are on the map, especially in fog, forest or darkness.… - [Reading a map](https://gridsurvivor.app/guide/reading-a-map): A paper map never runs out of battery, and knowing how to read one turns a confusing landscape into something you can… - [Retracing your route](https://gridsurvivor.app/guide/retracing-your-route): Going back the way you came is often the safest choice when weather turns, someone is hurt or you're unsure of the way… - [Using a compass](https://gridsurvivor.app/guide/using-a-compass): A simple baseplate compass works anywhere, needs no battery and is light enough to carry every time. Combined with a… - [What to do if you are lost](https://gridsurvivor.app/guide/what-to-do-if-you-are-lost): Being lost is unsettling, but most people who get lost are found, often quickly. The most important thing is to stop… ## Guide: Signalling and rescue - [Ground signals for aircraft](https://gridsurvivor.app/guide/ground-signals): From the air, a person on the ground is tiny and easy to miss. Large shapes and symbols that contrast with the ground… - [Helping a helicopter find you](https://gridsurvivor.app/guide/helping-a-helicopter-find-you): A rescue helicopter can reach places nobody else can, but the crew still has to spot you and land or winch safely.… - [Signalling for help](https://gridsurvivor.app/guide/signalling-for-help): Rescuers look for anything that doesn't belong in the landscape: bright colours, straight lines, movement and patterns… - [Smoke and fire signals](https://gridsurvivor.app/guide/smoke-signals): A column of smoke can be seen from far away in daylight, and a fire is easy to spot at night. Signal fires are… - [Talking to rescuers](https://gridsurvivor.app/guide/talking-to-rescuers): When you reach the emergency services, clear and calm information helps them send the right help to the right place… - [Using a signal mirror](https://gridsurvivor.app/guide/signal-mirror): On a sunny day, a flash from a mirror can be seen many kilometres away — often much further than a person, a fire or a… ## Guide: Weather and nature - [Dangerous animals](https://gridsurvivor.app/guide/dangerous-animals): Most wild animals avoid people, and serious encounters are rare. Knowing how to avoid surprising them, and how to… - [Flash floods](https://gridsurvivor.app/guide/flash-floods): Flash floods can rise within minutes, sometimes under a clear sky, when heavy rain falls further upstream. Knowing… - [Fog and poor visibility](https://gridsurvivor.app/guide/fog-and-poor-visibility): When fog, low cloud or heavy snow closes in, familiar ground can suddenly look unrecognisable. Careful navigation and… - [Reading the clouds](https://gridsurvivor.app/guide/reading-the-clouds): Without a forecast, the sky is your best guide to what the weather will do next. Clouds can warn you of rain, wind or… - [Strong winds](https://gridsurvivor.app/guide/strong-winds): Strong wind makes walking harder, chills you quickly and can bring down trees and loose objects. Recognising when it's… - [Surviving extreme cold](https://gridsurvivor.app/guide/surviving-extreme-cold): Cold weather drains your energy faster than almost anything else. Staying dry, insulated and fed helps you stay safe,… - [Surviving extreme heat](https://gridsurvivor.app/guide/surviving-extreme-heat): Heat can overwhelm the body faster than many people expect, especially when you're active, short of water or unused to… - [Thunderstorms and lightning](https://gridsurvivor.app/guide/thunderstorms-and-lightning): Lightning is dangerous, but the risk drops sharply when you know the warning signs and act early. Most lightning… ## Guide: Disasters and emergencies - [Coping with a long power cut](https://gridsurvivor.app/guide/long-power-cut): Most power cuts are over in a few hours, but storms, heat and grid faults can leave homes without electricity for… - [Earthquakes](https://gridsurvivor.app/guide/earthquakes): Most earthquake injuries come from falling objects and people trying to move during the shaking. Knowing what to do in… - [Evacuating your home](https://gridsurvivor.app/guide/evacuating-your-home): Sometimes the safest place is somewhere else. If you're told to leave, going quickly and calmly, with the right… - [Floods](https://gridsurvivor.app/guide/floods): Floodwater rises fast and is more powerful than it looks. Most flood deaths happen when people walk or drive into… - [Gas leaks and chemical incidents](https://gridsurvivor.app/guide/gas-leaks-and-chemical-incidents): A gas leak or chemical spill can cause fires, explosions or poisoning. Acting quickly and without creating a spark… - [Heatwaves](https://gridsurvivor.app/guide/heatwaves): Extreme heat is one of the deadliest weather hazards, and it's often older people, babies and those with health… - [Hurricanes and severe storms](https://gridsurvivor.app/guide/hurricanes-and-severe-storms): Hurricanes, typhoons and severe storms bring damaging winds, flooding and power cuts. You usually get a few days'… - [Pandemics and outbreaks](https://gridsurvivor.app/guide/pandemics-and-outbreaks): When an infectious disease spreads widely, simple habits can protect you and the people around you. The aim is to… - [Sheltering in place](https://gridsurvivor.app/guide/sheltering-in-place): In some emergencies, such as a chemical leak, a radiation release or dangerous smoke, going outside is riskier than… - [When the tap water stops](https://gridsurvivor.app/guide/when-the-tap-water-stops): Burst mains, droughts, floods and power cuts can all cut off your water. You need water for drinking, cooking and… - [Wildfires](https://gridsurvivor.app/guide/wildfires): Wildfires can spread faster than you can run, and smoke can cut visibility to nothing in minutes. The safest choice is… - [Winter storms and extreme cold](https://gridsurvivor.app/guide/winter-storms): Heavy snow, ice and freezing temperatures can cut off roads and power for days. The main dangers are cold, slips and… ## Guide: Hygiene - [Looking after your feet](https://gridsurvivor.app/guide/looking-after-your-feet): If you have to walk a long way, stand for hours or live in wet conditions, your feet can quickly become your biggest… - [Making an emergency toilet](https://gridsurvivor.app/guide/improvised-toilet): If the water or sewers stop working, toilets quickly become a health risk. Human waste spreads diseases like diarrhoea… - [Managing rubbish and waste](https://gridsurvivor.app/guide/managing-rubbish-and-waste): If bin collections stop, rubbish soon attracts rats, flies and disease. A simple system keeps your home and the area… - [Washing hands without running water](https://gridsurvivor.app/guide/washing-hands-without-running-water): Clean hands stop many illnesses spreading, especially stomach bugs. When the taps don't work, you can still wash… ## Guide: Tools and knots - [Building an emergency repair kit](https://gridsurvivor.app/guide/emergency-repair-kit): When shops are shut and help is busy, being able to fix a leak, a broken window or torn clothing yourself makes life… - [Making improvised cordage](https://gridsurvivor.app/guide/improvised-cordage): Rope and string are needed for shelters, splints, carrying loads and fishing. If you run out, you can make strong cord… - [Six essential knots](https://gridsurvivor.app/guide/six-essential-knots): You don't need to know dozens of knots. These six cover almost every job, from tying a shelter to securing a load.… - [Using a knife safely](https://gridsurvivor.app/guide/using-a-knife-safely): A good knife is one of the most useful tools you can have. Used carelessly, it's also one of the easiest ways to…