Magnetic Monitor
Geomagnetic Data Collection
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Professional Geomagnetic Data Collection Tool
Magnetic Monitor is a professional app designed for earthquake research and geomagnetic data collection. Utilizing iPhone's built-in
magnetometer, it enables high-precision real-time collection, analysis, and export of geomagnetic field data.
Core Features
Real-time Data Collection
1Hz sampling rate for precise magnetic field recording. Auto-calculate total field, horizontal component, declination, and inclination.
Real-time display of X, Y, Z axis magnetic field data in nanoTesla units.
GPS Positioning
Accurate recording of sampling point coordinates and altitude. Real-time positioning accuracy display. Background location updates support.
Data Visualization
4 synchronized real-time charts showing magnetic field changes. Step interpolation algorithm for clear discrete sampling data. Auto-scaling axes
for different data ranges.
Data Management
Local persistent storage, data never lost. Support for adding notes. Quick search through historical records.
Data Export (Premium Feature)
JSON format: Complete data structure with metadata and statistics.
CSV format: Excel compatible for easy analysis.
Unlimited export of any number of sampling points.
Statistical Analysis
Auto-calculate mean, standard deviation, max, and min values. Magnetic interference detection alerts. Collection duration and sample count
statistics.
Use Cases
Earthquake precursor research
Geomagnetic field monitoring
Scientific data collection
Educational demonstrations
Magnetic environment assessment
Technical Features
MVVM architecture for clean code structure. CoreMotion framework ensuring data accuracy. Swift Charts library for smooth visualization. Support
for 10 language interfaces.
Usage Tips
Recommend 3-5 minutes collection per sampling point. Stay away from metal objects and electronic devices. Keep device level and stable. Best
results in outdoor open environments.
Privacy Protection
All data stored locally on device only. No personal information uploaded. Location data used only for marking sampling points.
Upgrade to Premium to unlock full data export features and support your research work.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's New
• Improved device compatibility so the app can now be installed on more supported iPhones running iOS 16 and later.
The developer, 书心 刘, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 书心 刘
- Size
- 6 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium $1.99
- Copyright
- © 2026 南蛮书心