Five steps from something you noticed 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.
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.
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.
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.
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.
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.
Free on iPhone and Android.