Alerts for cities and municipalities
The common thread is not size. It is that the message matters more than the medium, and that the people who need it already know who you are.
Draw a circle without knowing who is inside it
You place a centre and a radius on a map, and the circle travels attached to the alert. Every subscriber’s phone receives it and compares its own position locally, then decides whether to show it. No subscriber position is ever sent to us, which is why this is a design fact rather than a promise: there is no column anywhere that could hold one. Two consequences follow deliberately. A geofence only ever narrows — it cannot add somebody who did not subscribe. And it fails open: a phone that cannot work out where it is shows the alert rather than hiding it, because missing an evacuation is worse than seeing one meant for the next street.
Four subscribers or four million, same message
Sending does not fan out into per-recipient work: an alert is written once and each phone asks for what it has not seen. That is why the cost and the speed do not change with the size of the audience, why there is no queue to drain and no per-message price to negotiate. It is also the reason the honest-numbers section reads the way it does — the same design that makes it cheap is what makes a delivery receipt impossible.
Three numbers, and the one we will not print
You get: how many devices could be reached at the moment you sent, how many phones reported opening the alert, and how many acknowledged it. What you do not get is a delivery rate, because there is no per-device delivery record anywhere in this product — that absence is exactly what makes sending to four million people cost the same as sending to four. Reads and acknowledgements are self-reports from handsets that chose to send one, and they are labelled as such rather than dressed up as receipts.
Questions, answered plainly
Do you know where my subscribers are?
No. The circle is sent with the alert and each phone compares its own position locally. We hold no subscriber location, so there is nothing to leak, subpoena or lose. A phone that cannot determine its position shows the alert rather than hiding it.
Does it get slower or more expensive as we grow?
No. An alert is written once and each device asks for what it has not seen, so four million subscribers cost the same to send to as four. Your plan caps how many subscribers a channel may have, but the send itself does not change shape.
Why is there no delivery rate?
Because there is no per-device delivery record anywhere in the product, and that is a deliberate design decision rather than a gap. A phone’s inbox is a query over sent alerts, which is what makes the cost independent of audience size. We would rather show three numbers we can stand behind than a fourth we invented.
Do subscribers need an account?
No. They install the app, subscribe to a handle, and that is the whole of it. Only the person running the channel signs up for anything.
Say it once. Every subscribed phone gets it.
Free up to 100 subscribers, no card to start, and the handle is yours permanently.
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