Comparison

Marine Docker vs Magnetic Field Scanner

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

Head to head
About

Marine Docker

Features
Read full description

A premium, and sustainable solution: anchor into the elite marinas of tomorrow. DOCKER has a built-in system of winders that serve users in managing and controlling energy consumption – water, electricity, and waste water. Allow boaters complete control over their own connection, even when they’re not on the vessel. DOCKER enables the control of moorings via this mobile application which helps in planning the user’s sailing by enabling online booking of moorings in transit marinas. Supplying electricity and water has never been simpler with this complete and unique docking system. DOCKER is an all-in-one solution for both marina operators and users. Considering the systems it offers, the marina takes on a clean, modern, and safe look. It also comes with a SMART system, allowing marinas to optimise the costs. Users no longer need to store cables and hoses on their own vessels, which frees up storage space. Users can also access fully automated systems for supplying electricity and drinking water.

About

Magnetic Field Scanner

This utility app uses your phone's magnetometer to detect unusual magnetic field spikes, which may indicate the presence of hidden electronic devices. It provides real-time alerts, visual graphs, and customizable sensitivity to help you scan your surroundings for potential privacy threats.

Highlights
  • Real-time magnetic field scanning
  • Hidden device alerts with adjustable sensitivity
  • Live visual graph of magnetic signals
  • 3-axis sensor readouts
  • Data history for pattern spotting
  • Offline and private operation
Features
Read full description

Worried someone might be spying on you? Instantly scan for hidden cameras, GPS trackers, and spy bugs using your phone. Spy Detector: EMF Scanner helps you protect your privacy with real-time magnetic field detection and instant alerts. HOW IT WORKS Your phone already has a magnetometer sensor built in — the same one used by compasses. Spy Detector transforms that sensor into a powerful EMF scanner, letting you identify unusual magnetic activity around you. Such magnetic spikes may occur near hidden electronic devices, metal objects, or power sources. FEATURES - Smart EMF scanner: Uses your device’s magnetometer to measure real-time magnetic field strength in microteslas (µT). - Hidden device alerts: Set sensitivity levels and get instant audio or vibration alerts when magnetic readings suddenly spike. - Live visual graph: Watch real-time waveforms of detected signals as you move your phone around. - Customizable sensitivity: Adjust thresholds for different environments (home, car, office, hotel). - 3-axis readouts: View detailed X, Y, Z sensor values for precise analysis. - Data history: Quickly review recent magnetic field changes to spot patterns. - Clean, discreet interface: Dark “matrix-style” visuals that look sleek and reduce glare in low light. - Offline & private: No internet, no tracking. All processing happens locally on your device. HOW TO USE 1. Open the app, tap on "SCAN" to start scanning. 2. Move your phone slowly around suspicious areas (mirrors, walls, smoke detectors, switches). 3. Watch for magnetic spikes on the live graph or listen for alerts. 4. Adjust sensitivity if needed to reduce false signals. 5. Use vibration mode for silent, discreet scanning. PERFECT FOR - Travelers checking hotel rooms or rentals - Anyone concerned about hidden recording devices - Security-minded professionals or journalists - Students and hobbyists exploring EMF fields - Everyday users who value privacy and peace of mind Protect your privacy today. Download Spy Detector: EMF Scanner and take control of your personal space. IMPORTANT NOTE Spy Detector: EMF Scanner uses your device’s built-in magnetometer to detect changes in magnetic fields. While strong spikes may indicate nearby electronic components, magnets, or metal structures, the app cannot guarantee detection of hidden cameras or GPS trackers in every case. Use it as a first-line privacy tool and combine it with visual inspection for best results. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Marine Docker4 screens
Magnetic Field Scanner4 screens

Verdict

The call

The clearest difference is in-app purchases: Marine Docker at none against Magnetic Field Scanner's 3. Marine Docker also leads on iOS requirement (13.4 vs 17.6). Magnetic Field Scanner's advantage is update cadence (every 2 months vs every 4 months). On price, ads and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Magnetic Field Scanner sells 3 in-app purchases, starting at $5.99 per month. Marine Docker asks for nothing beyond the download.

UpkeepUpdate frequency

Marine Docker ships an update every 4 months, Magnetic Field Scanner every 2 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 6 level
Marine Docker versus Magnetic Field Scanner: the parameters behind the verdict, then further details
ParameterMarine DockerMagnetic Field Scanner
PriceFreeFree
Rating—4.3 (12 ratings) — better
Number of ratings—12 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.4 — better17.6
Further details — not scored
Size61 MB5 MB
Age rating4+4+
DeveloperKontis d.o.o.Hoang Le

In-app purchases

None

Marine Docker

No in-app purchases

3 purchases

Magnetic Field Scanner

Subscriptions2
  • MagnetoScanner Month Pass$5.991 Month
  • MagnetoScanner Year PAss$29.991 Year
One-time1
  • MagnetoScanner Lifetime Access$39.99

Questions

Is Marine Docker free?
Marine Docker is free to download, with no in-app purchases.
Is Magnetic Field Scanner free?
Magnetic Field Scanner is free to download, with in-app purchases available.
Do Marine Docker or Magnetic Field Scanner have ads?
Neither Marine Docker nor Magnetic Field Scanner shows ads.
Which is updated more often, Marine Docker or Magnetic Field Scanner?
Marine Docker ships an update every 4 months, and Magnetic Field Scanner every 2 months. Most recently, Marine Docker was updated on October 27, 2026 and Magnetic Field Scanner on October 30, 2026.

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