Use cases
Six situations, and what each would take.
Ordered from the ones that need something out in the field to the ones that run on a phone the user already has.
Perimeter security
A tag crosses the site line out of hours, with nobody on the gate, and something still has to notice.
The hard partIt lives outside all winter. Sealed enclosure, a battery nobody is going to climb a post to recharge, and a mount that survives being knocked.
Family & personal safety
A kid crosses the school gate and a parent’s phone says so.
The hard partIt has to be worn. Small enough that a child keeps it on, charged by somebody who will forget, and it must not look like a tracker.
Fleet & delivery
A van crosses the depot gate, and the arrival lands in your system before the driver has the door open.
The hard partThe move from ten to ten thousand. A pilot on bought hardware and a fleet on your own are different projects. The zones and the events do not change; everything around them does.
Livestock & agriculture
A collar crosses the paddock line somewhere with no signal, and the tracker decides that by itself.
The hard partThere is no signal out there. Detection happens on the collar, against zones already cached on it. Nothing is asked of a server at the moment of crossing.
Compliance zones
A driver crosses into a low-emission zone and hears it from your app, not from a penalty notice weeks later.
The hard partCity boundaries are enormous shapes. The copy that reaches a device is simplified — the shape survives, the vertex count does not.
Retail, tourism & events
A shopper crosses your shop doorway and the offer is already on their phone.
The hard partiOS hands your app twenty geofences. Past twenty places the OS cannot be the detector, so evaluation happens in your process on every fix.
Not on this list? The zone does not know what is crossing it — if your thing moves and there is a line that matters, the same event comes out. Tell us what you are building →
Define once. Evaluate anywhere.
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