Checkpoint scanning that turns patrols into proof.
Place QR or NFC checkpoints around a site. Each scan records exactly where an officer was and when — turning “I walked the perimeter” into a time- and location-stamped fact that lands in the shift report.
Checkpoint Scan
East Gate
Scanned · secure
Both, on one app
QR or NFC — use whichever fits the post.
When to use QR
- Works with any phone camera — nothing extra to buy
- Fast to print and replace if a tag is damaged
- Great for a quick rollout or temporary checkpoints
When to use NFC
- Tap to scan — no need to line up a camera in the dark
- Durable tags suited to permanent, weather-exposed posts
- Harder to copy than a printed code
A scan is more than a beep
Every scan carries location and time.
Tied to location
A scan is recorded with the officer's GPS position, so a checkpoint hit is backed by where they actually were.
Tied to time
Each scan is timestamped, building an ordered timeline of the patrol that's easy to audit later.
Missed = visible
When a checkpoint goes overdue, the app automatically alerts the officer and admin, and the gap is flagged in the report.
A note on NFC and Android
NFC tap-to-scan runs on the Sentinel Hound Android app. QR scanning works in the browser and on Android. If your team is on iPhones or mixed devices, QR checkpoints keep everyone covered. See the download options.
Put proof at every post.
$49/mo + $2 per guard / month · 7 days free trial.
Related: patrol verification software · how it works