MeterWorks Teslameter
Magnetic Field Meter & EMF
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Your iPhone has a real magnetic field sensor — this app turns it into an honest instrument. No ghost detector, no ads covering the reading, no subscription: MeterWorks Teslameter measures, records, and documents magnetic fields.
MEASURE
• Live field strength |B| with a big readout and a smooth real-time graph
• All three axes plus magnitude, 100 Hz sampling, µT or mG
• Zero baseline: blank out the ambient field and hunt magnets and metal in delta mode
• Compass calibration state shown honestly
RECORD & ANALYZE
• Recordings with key metrics: RMS, peak, peak-to-peak, crest factor
• Zoom, pan, and cursor in the recording graph — stats for the visible range
• Pro: FFT spectrum with peak list and AC field indicator (50 Hz mains hum, beta)
YOUR DATA IS YOURS
• Free: PNG export of all four channels
• Pro: clean CSV export of the full raw series — spreadsheet-ready
• Pro: multi-page PDF report with statistics matrix, time series, spectra, and measurement documentation
FREE VS. PRO — NO SURPRISES
Free is a real instrument: unlimited live measurement, three recordings of 10 seconds each, full metrics, PNG export. Pro is a single one-time purchase: unlimited recordings, FFT analysis, CSV and PDF export — all future Pro features included. No subscription, ever.
WHAT THIS APP CANNOT DO — HONESTLY
The magnetometer measures static and low-frequency magnetic fields up to 50 Hz (the Nyquist limit of 100 Hz sampling). Radio frequency — cellular, Wi-Fi, Bluetooth — is beyond ANY smartphone magnetometer; apps promising "radiation readings" are bluffing. This is not a wire detector either: always use a proper scanner before drilling. The in-app page "Limits of this measurement" explains exactly what works.
TYPICAL USES
Locate magnets and magnetic metal · compare speaker and magnet field strength · check low-frequency EMF indicatively · show Earth's field (physics class)
NO SUBSCRIPTION. NO ADS. NO TRACKERS.
All measurement data stays on your device. EMF put honestly in context: facts, not fear. MeterWorks is a family of honest measurement apps — Teslameter is one of them.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fixes and improvements.
The developer, Emil Deak, 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:
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Emil Deak
- Size
- 7.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- MeterWorks Pro $7.99
- Copyright
- © 2026 Holzbucht - Emil Deak