Comparison

FourScan vs Sensor

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

Head to head
About

FourScan

Features
Read full description

Protect your privacy with 4 scanning technologies. Worried about hidden cameras or listening devices in hotels, Airbnbs, or rental spaces? FourScan runs 4 detection scans sequentially with a single tap. [4 Detection Powers] 1. Magnetic Scan - Detects magnetic field anomalies from electronic devices 2. Infrared Scan - Uses front camera to detect IR LEDs from night vision cameras 3. Wi-Fi Scan - Discovers suspicious devices on the local network 4. Bluetooth Scan - Searches and analyzes nearby BLE devices Note: Basic checking tool, not a substitute for professional investigation.

About

Sensor

Features
Read full description

SensorStream turns your iPhone and Apple Watch into real-time motion sensor tools. Select a device, choose the sensor streams you need, and view smooth live graphs with sampling- rate information. Record sessions locally and export the captured data as CSV files for analysis, research, testing, or development. Features include: β€’ iPhone and Apple Watch sensor streaming β€’ Accelerometer and gyroscope data β€’ Gravity and magnetic-field measurements β€’ Pitch, roll, yaw, quaternions, and rotation matrices β€’ Live sampling-rate display β€’ Selectable sensor channels β€’ Smooth, full-width graphs β€’ Local recording with pause and resume controls β€’ CSV file sharing and deletion β€’ Light and dark appearance support Available streams depend on the selected device and its hardware capabilities. SensorStream excludes HealthKit-dependent biometric data.

Screenshots

FourScan3 screens
Sensor4 screens

Verdict

The call

The clearest difference is iOS requirement: FourScan at 16.0 against Sensor's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Β· 5 level
FourScan versus Sensor: the parameters behind the verdict, then further details
ParameterFourScanSensor
PriceFreeFree
Update frequencyEvery 10 daysβ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, Apple Watch β€” better
Requires iOS16.0 β€” better18.0
Further details β€” not scored
Size3 MB30 MB
Age rating4+4+
Developersatoshi amasakiYerim Lab LLC

In-app purchases

None

FourScan

No in-app purchases

None

Sensor

No in-app purchases

Questions

Is FourScan free?
FourScan is free to download, with no in-app purchases.
Is Sensor free?
Sensor is free to download, with no in-app purchases.
Do FourScan or Sensor have ads?
Neither FourScan nor Sensor shows ads.

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