Comparison

FourScan vs Sensor

Price, ratings, monetisation and update history for both apps, side by side — 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

Transform your iPhone and Apple Watch into live motion sensor tools. Stream data like accelerometer and gyroscope readings in real-time with smooth graphs and sampling rate information. Record and export captured data as CSV files for analysis and research.

Highlights
  • iPhone and Apple Watch sensor streaming
  • Accelerometer and gyroscope data
  • Gravity and magnetic-field measurements
  • Pitch, roll, yaw, quaternions, rotation matrices
  • Live sampling-rate display
  • Local recording with pause/resume
  • CSV file export and sharing
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: • iPhone and Apple Watch sensor streaming • Accelerometer and gyroscope data • Gravity and magnetic-field measurements • Pitch, roll, yaw, quaternions, and rotation matrices • Live sampling-rate display • Selectable sensor channels • Smooth, full-width graphs • Local recording with pause and resume controls • CSV file sharing and deletion • 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 · 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 8 level
FourScan versus Sensor: the parameters behind the verdict, then further details
ParameterFourScanSensor
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 days—
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS16.0 — better18.0
Further details — 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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