Compass vs Sentry
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Compass
Read full descriptionHide full description
Compass - SLOX is a beautiful and accurate digital compass that helps you find your direction anywhere. KEY FEATURES: ⢠Real-Time Heading Accurate compass readings from 0° to 360°, updated in real-time as you move. ⢠Cardinal Directions Clear display of North, East, South, and West with intercardinal directions (NE, SE, SW, NW). ⢠Beautiful Design Elegant rotating compass dial with smooth animations and a modern dark theme. ⢠Direction Cards Quick reference cards showing your proximity to each cardinal direction. ⢠Works Offline No internet connection required - uses your device's built-in magnetometer. PERFECT FOR: - Hiking and outdoor adventures - Camping and wilderness navigation - Travel and exploration - Finding directions in unfamiliar places - Educational purposes Simple, accurate, and beautifully designed. Download Compass - SLOX today!
Sentry
Read full descriptionHide full description
A room-scanning aid for your phone. Hidden cameras get concealed in everyday objects ā 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 ā infrared light, magnetic fields, bright reflections, and the devices on the network around you ā 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 ⢠Infrared (IR) Scan ā your camera sensor can show infrared light, the kind night-vision cameras emit in the dark (as do remotes and many sensors) ⢠Magnetic Field ā reads spikes near powered electronics, including devices with no Wi-Fi ⢠Lens Reflection Scan ā on-device image analysis flags bright, lens-like glare for you to look at ⢠Wi-Fi Network Audit ā lists devices on the network you're joined to and flags names matching known camera brands ⢠Bluetooth Scan ā 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 ā 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 ⢠Travelers in hotels, motels and Airbnbs ⢠Renters checking a new place ⢠Changing rooms, fitting rooms and restrooms ⢠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: ⢠Sentry Pro is available as a Weekly, Yearly or one-time Lifetime purchase. Prices are shown in the app and may vary by region. ⢠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. ⢠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
Screenshots
Verdict
The clearest difference is in-app purchases: Compass at none against Sentry's 4. Compass also leads on update cadence (weekly vs fortnightly) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Sentry sells 4 in-app purchases, starting at $9.99 per 7 days. Compass asks for nothing beyond the download.
Compass ships an update weekly, Sentry fortnightly. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.
| Parameter | Compass | Sentry |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly ā better | Fortnightly |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad, iPod ā better | iPhone, iPad |
| Requires iOS | 13.0 ā better | 17.0 |
| Further details ā not scored | ||
| Size | 18 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | SEOKWON YANG | MD. NASAR UDDIN REDOY |
In-app purchases
Compass
No in-app purchases
Sentry
- Sentry Pro (Weekly)$9.997 Days
- Sentry Pro (Yearly)3 Days trial$59.991 Year
- Sentry Pro Lifetime$99.99
- Sentry Pro Lifetime$149.99









