Comparison

Electromagnetic Detector PRO vs GUTCalc Physics Unit Converter

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

Head to head
About

Electromagnetic Detector PRO

Transform your device into an electromagnetic field detector to identify high-risk wireless zones and potential sources of radiation. Receive warnings for strong magnetic fields and record measurements with timestamps. Useful for detecting metallic objects behind walls or underground.

Highlights
  • Detect electromagnetic fields (EMF)
  • Warning beep for high radiation
  • Measure magnetic force on three axes
  • Record readings with timestamps
  • Store up to 100 records
  • Send measures via email
Features
Read full description

Detect the electromagnetic fields near you, known as EMF. It's not necessary an expensive electronic equipment. Your device is already a sensor to detect EMFs. Track when a high magnetic field has been measured while you take the mobile with yourself. A warning beep will be activated to warn you and prevent health problems. Use "Electromagnetic detector" as a scanner or as a EMF detector to detect high risk wireless zones. Check if your bed is EMF free! Appliances, microwaves and sockets could be now radiating you. Convert your iPhone into a EMF Meter (electromagnetic field tester) or as a teslameter. By using the internal compass hardware. You can view the raw data of the magnetic fields that are all around you on a digital display. Over a thousand research studies have linked EMFs to important biological effects. EMFs have been associated with symptoms such as nausea, headache, fatigue, anxiety, mental confusion, memory loss, sleep disturbance, itchy or burning skin sensations, and skin rashes. The electromagnetic radiation come from broken or lose wires behind the wall, or electrical socket, appliances and other electrical devices in the home. Finding pipes or other metallic objects under ground or behind walls. Detecting the presence of ghost. Clocks and radios near the bed may also contribute. Exposures to EMFs from cordless phones, cell phones, wireless computer equipment, Wi-Fi, etc. Scientist, Teachers, Students, Engineers, all use EMF Meter's for detecting magnetic fields of all types. ***Features: -You can track when a high magnetic field has been measured and when, so the current time is stored. -Warning beep near focus radiation. -Detect the strength of Magnetic force fields on all three axis’s (x,y,z). -Magnetic force is calculated in microteslas ( µT ) -Record your readings with a time & date stamp of each event. -Store until 100 records. -Send measures by email. Please observe and respect the iPhone user manual and warranty if you intend to use your iPhone as a scientific device. We are not responsible for any damage that you or any other force of nature may cause to your device. Tips: You may calibrate the detector by moving the iPhone in the form of an 8. Note: This app will not work on an iPod Touch, since it does not have a compass hardware. This app is intended for entertainment purposes only and does not provide true Metal Detector functionality. This apps uses the magnetometer to measure the magnetic field when the iPhone is placed near feromagnetic metal objects. If you would like to have a feature added to this app. Please let us know, so that we can make this happen as soon as possible for you. Download it now to prevent stay near magnetic radiations! (EMF).

About

GUTCalc Physics Unit Converter

This calculator handles complex physics calculations with units. It supports SI, natural, and CGS units, physical constants, and functions. It automatically converts units and flags algebraic errors, with an option to upgrade for advanced organization and syncing features.

Highlights
  • SI, Natural, and CGS unit modes
  • Automatic unit conversion
  • Physical constants and functions
  • Implied multiplication
  • Custom keyboards
  • Unit checking for algebraic errors
  • Share and save results
Read full description

GUTCalc is a calculator that understands units. Enter a free-form expression consisting of arithmetic, SI and non-SI units, physical constants (like Planck's constant h or the speed of light c), and functions (like exp, arctan, and cosh) and GUTCalc will work out the answer including any necessary conversions. Natural units are fully supported, and are great for calculations in particle physics and quantum field theory. SI mode is perfect for quick and easy calculations of everyday quantities. FEATURES: * Choose from SI and three types of Natural unit modes. In Natural unit mode, various physical constants (such as hbar, c, kb, and eps0) are set to 1. GUTCalc automatically inserts factors of these constants to perform conversions and calculations in Natural units. * Gaussian CGS (dynes, ergs, esus, and statvolts) and Planck (quantum gravity) units are also supported. * Multiplication is implied: no need to insert *s everywhere. * Custom-designed keyboards for quick and easy input of common units, constants, and functions---or switch to the built-in keyboard for free-form input. * Calculations can extend over many orders of magnitude without overflow. Need to calculate exp(10000)? No problem. (Available on iOS 11+ and 64-bit devices running iOS 10) * Avoid algebraic errors thanks to GUTCalc's unit checking: inconsistent calculations are flagged in red with an explanatory message. * Share your results via email or save them in a note using the share feature. * Physical constants are updated to the latest values recommended by the Particle Data Group 2020 review, CODATA 2018, and the 2019 redefinition of SI base units. * Suggestions for features and additional constants are welcome. UPGRADE TO PRO FOR EXTRA FEATURES: * Create and manage multiple notebooks to keep your calculations organized * Sync notebooks with iCloud across multiple devices, including the macOS version of GUTCalc * Share notebooks with collaborators * Support the development of more pro features in the future

Screenshots

Electromagnetic Detector PRO3 screens
GUTCalc Physics Unit Converter4 screens

Verdict

The call

The clearest difference is price: GUTCalc Physics Unit Converter at Free against Electromagnetic Detector PRO's $4.99. GUTCalc Physics Unit Converter also leads on review sentiment (100% vs 57%) and rating (5.0 vs 4.3). Electromagnetic Detector PRO's advantage is in-app purchases (none vs 1) and iOS requirement (11.2 vs 13.0). On ratings volume, 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

GUTCalc Physics Unit Converter is free to download; Electromagnetic Detector PRO costs $4.99 up front. GUTCalc Physics Unit Converter sells 1 one-off in-app purchase. Electromagnetic Detector PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GUTCalc Physics Unit Converter holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 100% of GUTCalc Physics Unit Converter's.

UpkeepUpdate frequency

Electromagnetic Detector PRO ships an update every 14 months, GUTCalc Physics Unit Converter every 4 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

Scorecard7 real differences · 3 level
Electromagnetic Detector PRO versus GUTCalc Physics Unit Converter: the parameters behind the verdict, then further details
ParameterElectromagnetic Detector PROGUTCalc Physics Unit Converter
Price$4.99Free — better
Rating4.3 (12 ratings)5.0 (6 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings12 — better6
Update frequencyEvery 14 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.2 — better13.0
Further details — not scored
Size55 MB3 MB
Age rating4+4+
DeveloperJorge Gregorio Martin BelloTimothy Wiser

Customer experience

Electromagnetic Detector PRO

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews7 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

GUTCalc Physics Unit Converter

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electromagnetic Detector PRO

No in-app purchases

1 purchases

GUTCalc Physics Unit Converter

One-time1
  • GUTCalc Pro$2.99

Questions

Is Electromagnetic Detector PRO free?
Electromagnetic Detector PRO costs $4.99, with no in-app purchases.
Is GUTCalc Physics Unit Converter free?
GUTCalc Physics Unit Converter is free to download, with in-app purchases available.
Which has better reviews, Electromagnetic Detector PRO or GUTCalc Physics Unit Converter?
GUTCalc Physics Unit Converter is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while GUTCalc Physics Unit Converter averages 5.0 from 6 ratings.
Do Electromagnetic Detector PRO or GUTCalc Physics Unit Converter have ads?
Neither Electromagnetic Detector PRO nor GUTCalc Physics Unit Converter shows ads.
Which is updated more often, Electromagnetic Detector PRO or GUTCalc Physics Unit Converter?
Electromagnetic Detector PRO ships an update every 14 months, and GUTCalc Physics Unit Converter every 4 months. Most recently, Electromagnetic Detector PRO was updated on October 24, 2026 and GUTCalc Physics Unit Converter on October 16, 2026.

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