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Know What's Happening Around You. 4Warning is your local community safety network.

Send and receive warnings about dangers, hazards and disruption happening near you. See it. Share it. Avoid it.

Phone snatching
Pickpockets
Car theft
Bike theft
Dangerous persons
Street disturbances
Burglary
Traffic incidents
Missing persons
Road hazards
Phone snatching
Pickpockets
Car theft
Bike theft
Dangerous persons
Street disturbances
Burglary
Traffic incidents
Missing persons
Road hazards
Every day, people see something that could help
Every day, people see something that could help
someone nearby. A phone snatcher. A car thief.
someone nearby. A phone snatcher. A car thief.
A road hazard. The person walking toward it
A road hazard. The person walking toward it
knows nothing about it. 4Warning exists to
knows nothing about it. 4Warning exists to
close that gap — one warning at a time.
close that gap — one warning at a time.

Going about your day and spot danger, trouble or something others should avoid? Open 4Warning. Your location is automatically shown on the map.

See how it works
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THE IDEA IS SIMPLE. SEE SOMETHING. WARN SOMEONE.

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CHOOSE IT

Tap the warning icon that best describes what you see.

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SHARE IT

Send a text, photo, video or voice warning.

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WARN LOCALLY

4 Warning users within approximately 2 mile receive your warning.

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HELP EACH OTHER

They can avoid the situation - and when they see something near you, they can warn you.

How it works

From something you spotted to somebody else avoiding it.

Five steps. No sign-up wall, no waiting for the news to catch up — just people telling the people behind them what is ahead.

01

See it

A user sees something others should know about. A phone snatcher working a junction, a car being broken into, a hazard in the road — the kind of thing that stops with you unless there is a simple way to pass it on.

02

Share it

Create a warning through 4Warning. Choose what you saw and where it happened. It takes seconds, and you do not need followers or a long description for it to be useful to somebody walking that way.

03

Warn people nearby

The warning becomes available to relevant users nearby. Not broadcast to the whole country and not buried in a feed — it goes to the people whose route is about to take them past the thing you just reported.

04

Your bubble moves

Your half-mile radius moves with your current location. Walk, drive or cycle and the circle travels with you, so what counts as relevant keeps updating against where you actually are right now.

05

Receive an alert

When you move within approximately half a mile of a relevant warning, 4Warning may alert you. Before you reach it, while there is still time to change direction, avoid the area, or simply be more aware.

Download 4Warning

Free on iPhone and Android.

Why 4Warning

Information can travel around the globe in seconds, yet we can still be unaware of something happening a few streets away.

News and social media were never built to tell you what is happening on the road you are about to walk down. 4Warning is.

People warning people.

Community awareness helps people make better decisions about what is around them — whether that means changing direction, avoiding an area, or simply paying more attention. These are the kinds of things users report.

Download 4Warning
Phone snatching

Phone snatchers operating nearby, targeting people as they pass.

Pickpockets

Pickpockets operating in crowded areas, stations or public spaces.

Car theft

Vehicles being targeted, broken into or stolen nearby.

Bike theft

Bikes being targeted or stolen in the area.

Dangerous persons

Someone nearby behaving aggressively, suspiciously or posing a potential danger to others.

Street disturbances

Fights, disorder or hostile crowds that may be safer to avoid.

Burglary

A burglary or attempted break-in happening nearby.

Traffic incidents

Collisions, congestion or road closures affecting the local area.

Missing persons

Help your community stay alert for someone reported missing.

Road hazards

Flooding, debris, potholes or other hazards affecting the road.

SEE IT. SHARE IT. AVOID IT.

Free on iPhone and Android. Take a few seconds to warn the people behind you.

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What a Warning Looks Like

Examples of the kind of alert 4Warning delivers. Real warnings come from users near you, in the moment.

Warning Example 1

Two riders working the pavement near the station entrance, taking phones out of people's hands as they pass. Keep yours out of sight until you are through the underpass and back onto the main road.

Phone snatcher — moped

Reported 2 minutes ago · 0.3 miles
Warning Example 2

Three cars on the upper deck with their windows gone in the last hour. If you are parking here tonight, take everything off the seats — they are going for bags and anything left in plain view.

Car break-ins — retail car park

Reported 14 minutes ago · 0.4 miles
Warning Example 3

Water right across both lanes and the pavement is flooded on the eastbound side. Traffic is already backing up past the lights, so it is worth going round if you have another way through.

Road blocked — burst water main

Reported 31 minutes ago · 0.2 miles

Be part of the community

Occasional updates on new features and how the community is growing. No spam, and you can unsubscribe whenever you like.

4Warning does not replace the police or emergency services. In an emergency, always contact them first.

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What people warn each other about
Phone snatchingPickpocketsCar theftBike theftDangerous personsStreet disturbancesBurglaryTraffic incidentsMissing personsRoad hazards
Phone snatchingPickpocketsCar theftBike theftDangerous personsStreet disturbancesBurglaryTraffic incidentsMissing personsRoad hazards
Phone snatchingPickpocketsCar theftBike theftDangerous personsStreet disturbancesBurglaryTraffic incidentsMissing personsRoad hazards
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Download 4Warning

Be aware. Warn others. Become part of the community. 4Warning is free on iPhone and Android — see it, share it, avoid it.