ALPR detector apps: what Flock Alert and similar apps actually do

2 min readGuide

ALPR detector apps such as Flock Alert do not sense cameras. They compare your GPS position with a map of reported readers and warn you when one is near. That means they miss unmapped and mobile cameras. Flock Alert lists itself as free on iOS.

A map plus GPS, not a radio detector

Flock Alert's own page describes a live map of documented cameras, proximity alerts while driving, a route planner that opens Apple or Google Maps, and one-tap reporting. Its App Store page lists it as free with optional in-app donations, version 1.4.2 dated September 24, and no ratings overview yet. We read both on October 24, 2026.

Because alerts come from the map, an alert only fires for a camera someone reported. A silent app is not proof a road is clear. No map lists every camera, and none of these tools can promise a route that avoids all of them. Mobile and unmapped readers never show up on any of them.

FlockDetour vs other camera apps · How to avoid Flock cameras

Alerts tell you after you chose the road

A proximity alert fires as you approach. A route planner changes the road before you leave. FlockDetour's Pro navigation uses mapped cameras to offer alternatives; FlockDetour's map and web planner are free. As of October 3, 2026, the US App Store listed Pro at $4.99 a month, $39.99 a year or $49.99 once; prices differ by country and store and were not rechecked on October 24.

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See the cameras near you

The live map is free and needs no account.

Open the live map

Take it on the road

Free camera maps on iPhone and Android. Pro adds turn-by-turn navigation and camera-aware route modes.

Download on the App StoreGet it on Google Play

Questions people ask

Is Flock Alert free?
Its App Store page lists it as free with optional in-app donations.
Can an app detect a Flock camera by itself?
Not from the sources we read. These apps rely on a database of reported locations.
Are ALPR detector apps legal?
This is not legal advice. Check your state's rules; the apps describe themselves as transparency tools.
Do they work for mobile readers on patrol cars?
No. A fixed-location map cannot track a moving reader.
Is there an Android version?
We verified only the iOS listing for Flock Alert.

Related guides

Flock camera apps and maps compared: DeFlock, FlockHopper and more · DeFlock alternatives for finding and avoiding Flock cameras · How to avoid Flock cameras, legally · All guides · Live camera map · Get the app

Sources

  • Flock Alert: free iOS app: live map, proximity alerts, route planner that opens Apple or Google Maps; checked October 24, 2026
  • Flock Alert: App Store: listed free with optional in-app donations; version 1.4.2 dated Sept 24; no ratings overview yet
  • FlockDetour: US App Store: US iOS prices of $4.99 monthly, $39.99 yearly or $49.99 lifetime, as checked October 3, 2026
  • FlockDetour: data sources: where camera records come from

FlockDetour is independent and is not affiliated with or endorsed by Flock Safety or any surveillance vendor.