Comparison

Electromagnetic Detector PRO vs SpoolMate

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

SpoolMate

Track your 3D printing filament inventory with this app. Easily monitor remaining filament, log usage after prints, and receive low-stock notifications to ensure you always have enough material for your projects.

Highlights
  • Track filament levels
  • Log filament usage
  • Low-stock notifications
  • Support for common materials
  • Print history per spool
  • One-tap reordering
Features
Read full description

Never get caught mid-layer with an empty spool again. Before you start a print, check SpoolMate. See exactly how much filament you have left, make sure you have enough for the job, then log what you used when you're done. It takes seconds and saves ruined prints. TRACK YOUR COLLECTION • See every spool at a glance with color-coded fill indicators • Check remaining filament before you start a print • Log filament used after each print in seconds • Full print history per spool • Supports all common materials — PLA, PLA+, PETG, ABS, ASA, TPU, Nylon, PC, HIPS, and more • Track both 1.75mm and 2.85mm diameter filament NEVER LOSE A SPOOL • Scan QR labels to jump straight to any spool (SpoolMate+) • Print scannable labels for your shelf or storage bins (SpoolMate+) • Low-stock notifications so you can reorder before it's urgent REORDER IN ONE TAP • "Buy More" button on every spool to quickly reorder filament • Searches by brand, material, and color automatically SPOOLMATE+ Upgrade once, own it forever. • Unlimited spools • iCloud sync across all your devices • QR label generation and printing • Full print history (free tier shows last 5) • No ads SpoolMate is built for makers who take their filament seriously. Whether you have 3 spools or 30, SpoolMate keeps your inventory honest.

Screenshots

Electromagnetic Detector PRO3 screens
SpoolMate4 screens

Verdict

The call

The clearest difference is price: SpoolMate at Free against Electromagnetic Detector PRO's $4.99. SpoolMate 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 4) and ads (none vs shown).

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

SpoolMate is free to download; Electromagnetic Detector PRO costs $4.99 up front. SpoolMate sells 4 one-off in-app purchases. Electromagnetic Detector PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SpoolMate holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 12 and 3 respectively. Written reviews point the same way: 57% of Electromagnetic Detector PRO's written reviews are positive against 100% of SpoolMate's.

UpkeepUpdate frequency

Electromagnetic Detector PRO ships an update every 14 months, SpoolMate every 2 weeks. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

Scorecard10 real differences · 0 level
Electromagnetic Detector PRO versus SpoolMate: the parameters behind the verdict, then further details
ParameterElectromagnetic Detector PROSpoolMate
Price$4.99Free — better
Rating4.3 (12 ratings)5.0 (3 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings12 — better3
Update frequencyEvery 14 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.2 — better17.6
Further details — not scored
Size55 MB8 MB
Age rating4+4+
DeveloperJorge Gregorio Martin BelloChris TeSelle

Customer experience

Electromagnetic Detector PRO

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

SpoolMate

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electromagnetic Detector PRO

No in-app purchases

4 purchases

SpoolMate

One-time4
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$9.99
Show 1 more
  • SpoolMate+$14.99

Questions

Is Electromagnetic Detector PRO free?
Electromagnetic Detector PRO costs $4.99, with no in-app purchases.
Is SpoolMate free?
SpoolMate is free to download, with in-app purchases available.
Which has better reviews, Electromagnetic Detector PRO or SpoolMate?
SpoolMate is rated higher. Electromagnetic Detector PRO averages 4.3 out of 5 from 12 ratings, while SpoolMate averages 5.0 from 3 ratings.
Do Electromagnetic Detector PRO or SpoolMate have ads?
SpoolMate shows ads; Electromagnetic Detector PRO does not.
Which is updated more often, Electromagnetic Detector PRO or SpoolMate?
Electromagnetic Detector PRO ships an update every 14 months, and SpoolMate every 2 weeks. Most recently, Electromagnetic Detector PRO was updated on October 3, 2026 and SpoolMate on October 1, 2026.

Other comparisons