Comparison

Sentry vs Hidden Cam Detect

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Sentry

Features
Read full description

A room-scanning aid for your phone. Hidden cameras get concealed in everyday objects โ€” smoke detectors, USB chargers, alarm clocks, vents and mirrors. Sentry uses the sensors already in your phone to measure five different signals in a room and shows you every reading, so you know which spots are worth inspecting by hand. Sentry does not identify cameras. It measures signals โ€” infrared light, magnetic fields, bright reflections, and the devices on the network around you โ€” and each of those signals can come from ordinary electronics just as easily as from a camera. No app, and no dedicated hardware, can find every hidden camera. Sentry is a tool that guides a careful manual check; it is not a guarantee and should never be treated as one. WHAT SENTRY MEASURES โ€ข Infrared (IR) Scan โ€” your camera sensor can show infrared light, the kind night-vision cameras emit in the dark (as do remotes and many sensors) โ€ข Magnetic Field โ€” reads spikes near powered electronics, including devices with no Wi-Fi โ€ข Lens Reflection Scan โ€” on-device image analysis flags bright, lens-like glare for you to look at โ€ข Wi-Fi Network Audit โ€” lists devices on the network you're joined to and flags names matching known camera brands โ€ข Bluetooth Scan โ€” lists nearby advertising devices with an estimated distance HOW TO USE IT 1. Tap Scan and pan your phone slowly around the room 2. Watch the live readings โ€” a glow, a highlighted box or a signal spike 3. Go to each flagged spot and inspect it with your own eyes and hands The third step is the important one. Sentry tells you where to look; it cannot tell you what is there. BUILT PRIVATE Sentry works entirely on your device. No account. No uploads. No tracking. Your scans and any photos you save never leave your phone. WHO IT'S FOR โ€ข Travelers in hotels, motels and Airbnbs โ€ข Renters checking a new place โ€ข Changing rooms, fitting rooms and restrooms โ€ข Meeting rooms and private offices SENTRY PRO Sentry Pro unlocks all 5 scan methods, unlimited full-room guided sweeps, and a private scan history. Choose a one-time Lifetime purchase, a Yearly plan, or a flexible Weekly plan. Cancel anytime. IF YOU FIND SOMETHING If you believe you've found a real device, stay calm, don't touch it, document it, and contact the property and your local authorities. ---------- Subscription details: โ€ข Sentry Pro is available as a Weekly, Yearly or one-time Lifetime purchase. Prices are shown in the app and may vary by region. โ€ข Subscriptions auto-renew unless turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends. โ€ข Manage or cancel anytime in your App Store account settings. Any unused portion of a free trial is forfeited when you buy a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/sentryhiddencameradetector/home Questions or feedback? developer.nasar416@gmail.com

About

Hidden Cam Detect

Features
Read full description

Hotel room, short-term rental, or your own home โ€” Hidden Cam Detect sweeps the space for hidden cameras, microphones and tracking devices. And when something turns up, it helps you walk to it. SEE WHAT'S ON THE NETWORK Most hidden cameras need Wi-Fi to be useful. The app lists what's connected and tells you what each thing actually is โ€” "IP camera, known brand" instead of "192.168.1.42" โ€” along with the reason it was flagged. Printers, speakers and phones get ruled out instead of padding the list. WALK TO IT, DON'T JUST WORRY ABOUT IT - A proximity meter that rises as you get closer, with haptic feedback. - An AR signal map you paint by walking around the room, so you can see where the signal peaks. (Pro) - LiDAR depth markers that pin a suspicious reflection in 3D โ€” needs an iPhone Pro. (Pro) CHECK WITH YOUR OWN EYES - Lens scan: your flashlight and camera catch the glint a lens reflects back. - Infrared viewer for the invisible IR light night-vision cameras give off. (Pro) - A guided checklist of the places devices usually hide โ€” smoke detectors, alarm clocks, power strips, air vents โ€” and what to look for in each. AFTER EVERY SCAN A clear risk score with the reasoning behind it, plus a panel showing which checks ran and which ones couldn't โ€” so you always know what was covered and what wasn't. Save the result, compare it on your next visit, or export it as a PDF report. (Pro) HONEST ABOUT THE LIMITS No app can find every hidden device, and this one doesn't pretend to. It's a triage tool: it surfaces what a phone can pick up, then guides the rest of the search. "Nothing found" never means a room is safe. A recorder saving to a memory card, an older wired camera, or anything switched off gives off nothing a phone can detect. That's why every scan ends with the checklist. PRIVATE BY DEFAULT Your scan results stay on your phone and are never uploaded. No account, no sign-in. Optional anonymous crash and usage reports can be turned off in Settings. FREE Wi-Fi scan, Bluetooth scan, lens-glint tool, risk scoring, guided checklist and recent scans, plus one free Full Scan. PRO UNLOCKS Unlimited Full Scan, infrared viewer, magnetometer, LiDAR depth tools, AR locate, AR signal map, extended scan history and PDF export. - Trip Pass: one-time purchase, 72 hours of Pro. Does NOT renew. - Annual: auto-renewable subscription, billed yearly. - Lifetime: one-time purchase. Does NOT renew. Prices vary by region and your local price is shown before you buy. Payment is charged to your Apple Account at confirmation of purchase. Only the Annual plan renews automatically: it renews unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel in Settings > [your name] > Subscriptions. Terms of Use: https://nhanntv.github.io/hiddencamdetect/legal/en/terms.html Privacy Policy: https://nhanntv.github.io/hiddencamdetect/legal/en/privacy.html

Screenshots

Sentry4 screens
Hidden Cam Detect4 screens

Verdict

The call

Sentry and Hidden Cam Detect are too close to call on the numbers: across 6 compared parameters โ€” price, update cadence, ads and in-app purchases among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Sentry sells 4 in-app purchases, starting at $9.99 per 7 days and Hidden Cam Detect sells 3 in-app purchases, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sentry ships an update fortnightly, Hidden Cam Detect every 4 weeks. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

ScorecardNo meaningful differences
Sentry versus Hidden Cam Detect: the parameters behind the verdict, then further details
ParameterSentryHidden Cam Detect
PriceFreeFree
Update frequencyFortnightly โ€” betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.016.0 โ€” better
Further details โ€” not scored
Size16 MB70 MB
Age rating4+4+
DeveloperMD. NASAR UDDIN REDOYDUY NHAN TRINH

In-app purchases

4 purchases

Sentry

Subscriptions2
  • Sentry Pro (Weekly)$9.997 Days
  • Sentry Pro (Yearly)3 Days trial$59.991 Year
One-time2
  • Sentry Pro Lifetime$99.99
  • Sentry Pro Lifetime$149.99
3 purchases

Hidden Cam Detect

Subscriptions1
  • Pro ยท Annual$14.991 Year
One-time2
  • 72-Hour Trip Pass$2.99
  • Pro ยท Lifetime$39.99

Questions

Is Sentry free?
Sentry is free to download, with in-app purchases available.
Is Hidden Cam Detect free?
Hidden Cam Detect is free to download, with in-app purchases available.
Do Sentry or Hidden Cam Detect have ads?
Neither Sentry nor Hidden Cam Detect shows ads.
Which is updated more often, Sentry or Hidden Cam Detect?
Sentry ships an update fortnightly, and Hidden Cam Detect every 4 weeks. Most recently, Sentry was updated on October 5, 2026 and Hidden Cam Detect on September 30, 2026.

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