Comparison

Electromagnetic Detector PRO vs IO ∙ Converter & Calculator

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

IO ∙ Converter & Calculator

This utility app offers a comprehensive solution for unit and currency conversions, featuring live currency updates and a built-in calculator. It supports a wide range of units across multiple categories and is available on various Apple platforms.

Highlights
  • 13 conversion categories
  • Over 120 units supported
  • Live currency exchange rates
  • Integrated calculator
  • Cross-platform availability (Apple devices)
Features
Read full description

IO (Input/Output) is a powerful and simple multiplatform unit and currency converter. Features: ∙ 13 essential categories ∙ Over 120 different units ∙ Live currency updates ∙ Calculator functionality (on iPhone and iPad) ∙ Available on iPhone, iPad, Apple Watch and Mac ∙ No Ads

Screenshots

Electromagnetic Detector PRO3 screens
IO ∙ Converter & Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Electromagnetic Detector PRO at 57% against IO ∙ Converter & Calculator's 33%. Electromagnetic Detector PRO also leads on rating (4.3 vs 4.0) and ratings volume (12 vs 1). IO ∙ Converter & Calculator's advantage is price ($0.99 vs $4.99) and update cadence (every 5 months vs every 14 months). On ads, in-app purchases and monetization model 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

Electromagnetic Detector PRO costs $4.99 and IO ∙ Converter & Calculator $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Electromagnetic Detector PRO holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Electromagnetic Detector PRO has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 33% of IO ∙ Converter & Calculator's.

UpkeepUpdate frequency

Electromagnetic Detector PRO ships an update every 14 months, IO ∙ Converter & Calculator every 5 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Electromagnetic Detector PRO versus IO ∙ Converter & Calculator: the parameters behind the verdict, then further details
ParameterElectromagnetic Detector PROIO ∙ Converter & Calculator
Price$4.99$0.99 — better
Rating4.3 (12 ratings) — better4.0 (1 ratings)
Positive reviews57.1% of reviews — better33.3% of reviews
Number of ratings12 — better1
Update frequencyEvery 14 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac, Apple Watch — better
Requires iOS11.2 — better15.0
Further details — not scored
Size55 MB1 MB
Age rating4+4+
DeveloperJorge Gregorio Martin BelloAlex Codrington

Customer experience

Electromagnetic Detector PRO

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

IO ∙ Converter & Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral66.7%
Negative0.0%

In-app purchases

None

Electromagnetic Detector PRO

No in-app purchases

None

IO ∙ Converter & Calculator

No in-app purchases

Questions

Is Electromagnetic Detector PRO free?
Electromagnetic Detector PRO costs $4.99, with no in-app purchases.
Is IO ∙ Converter & Calculator free?
IO ∙ Converter & Calculator costs $0.99, with no in-app purchases.
Which has better reviews, Electromagnetic Detector PRO or IO ∙ Converter & Calculator?
Electromagnetic Detector PRO is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while IO ∙ Converter & Calculator averages 4.0 from 1 ratings.
Do Electromagnetic Detector PRO or IO ∙ Converter & Calculator have ads?
Neither Electromagnetic Detector PRO nor IO ∙ Converter & Calculator shows ads.
Which is updated more often, Electromagnetic Detector PRO or IO ∙ Converter & Calculator?
Electromagnetic Detector PRO ships an update every 14 months, and IO ∙ Converter & Calculator every 5 months. Most recently, Electromagnetic Detector PRO was updated on November 2, 2026 and IO ∙ Converter & Calculator on November 3, 2026.

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