Comparison

Electromagnetic Detector PRO vs GPU Tracker

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

GPU Tracker

Features
Read full description

Stop opening 10 browser tabs to find the cheapest GPU. GPU Tracker watches prices across 10 cloud providers — AWS, Google Cloud, Azure, Lambda Labs, RunPod, Vast.ai, CoreWeave, Paperspace, Hyperstack, and Salad — and shows you the cheapest current rate for every major NVIDIA GPU. WHAT YOU CAN DO - Browse live prices for H100, H200, A100 (40GB and 80GB), L40S, L4, A10, RTX 4090, RTX 3090, and B200 - Filter by GPU model, pricing type (on-demand, spot, community), and provider - See a price history chart for any instance - Set price alerts — for example, "notify me when 1x H100 spot drops below $1.50/hr" - Get push notifications when an alert fires - Tap any offer to jump straight to the provider's booking page ASK AN AI ASSISTANT Describe your workload — "fine-tune Llama 3 70B for 12 hours" or "cheapest A100 for an experiment" — and our AI assistant (powered by Anthropic's Claude) recommends the best option with reasoning. It knows the live price catalog and considers your duration, GPU count, and reliability needs. WHO THIS IS FOR - ML engineers and researchers training models on a budget - Indie AI developers shopping for the best deal on inference - Startup founders watching cloud burn rate HOW IT WORKS We refresh prices every hour from each provider's public API or pricing page. Alerts evaluate every 15 minutes. The app is free to use. PRIVACY We store your email (for sign-in), your alerts, and your anonymous push token. That's it. No tracking, no ads, no selling your data. Full policy: sridharrajarao.com/privacy Built by an indie developer. Feedback: sridhar.rajarao@gmail.com

Screenshots

Electromagnetic Detector PRO3 screens
GPU Tracker3 screens

Verdict

The call

The clearest difference is price: GPU Tracker at Free against Electromagnetic Detector PRO's $4.99. GPU Tracker also leads on update cadence (every 11 days vs every 14 months). Electromagnetic Detector PRO's advantage is iOS requirement (11.2 vs 15.1). On ads, in-app purchases 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

GPU Tracker is free to download; Electromagnetic Detector PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Electromagnetic Detector PRO ships an update every 14 months, GPU Tracker every 11 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Electromagnetic Detector PRO versus GPU Tracker: the parameters behind the verdict, then further details
ParameterElectromagnetic Detector PROGPU Tracker
Price$4.99Free — better
Rating4.3 (12 ratings) — better—
Positive reviews57.1% of reviews—
Number of ratings12 — better—
Update frequencyEvery 14 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.2 — better15.1
Further details — not scored
Size55 MB32 MB
Age rating4+4+
DeveloperJorge Gregorio Martin BelloSridhar Rajarao

In-app purchases

None

Electromagnetic Detector PRO

No in-app purchases

None

GPU Tracker

No in-app purchases

Questions

Is Electromagnetic Detector PRO free?
Electromagnetic Detector PRO costs $4.99, with no in-app purchases.
Is GPU Tracker free?
GPU Tracker is free to download, with no in-app purchases.
Do Electromagnetic Detector PRO or GPU Tracker have ads?
Neither Electromagnetic Detector PRO nor GPU Tracker shows ads.
Which is updated more often, Electromagnetic Detector PRO or GPU Tracker?
Electromagnetic Detector PRO ships an update every 14 months, and GPU Tracker every 11 days. Most recently, Electromagnetic Detector PRO was updated on November 2, 2026 and GPU Tracker on October 31, 2026.

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