Comparison

Trumpet Level vs Metal Detector・EMF Reader

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

Head to head
About

Trumpet Level

Features
Read full description

Check your trumpet playing level and evaluate with a score

About

Metal Detector・EMF Reader

Transform your iPhone into a versatile tool for detecting metal objects, locating wall studs, and measuring EMF levels. Utilize the device's built-in magnetometer for real-time insights into magnetic fields and signal strength, perfect for various DIY and utility tasks.

Highlights
  • Detect nearby metal objects
  • Find wall studs, screws, nails, pipes
  • Real-time magnetic field readings
  • Live EMF meter and graph visualization
  • Signal confidence indicator
  • Axis-based directional detection
Features
Read full description

Turn your iPhone into a powerful Metal Detector, Stud Finder & EMF Reader using the built-in magnetometer sensor. Metal Detector helps you locate nearby metal objects, detect magnetic fields, analyze EMF levels, and visualize live magnetometer readings directly from your device. Whether you’re searching for hidden metal, locating wall studs, checking electronics for EMF activity, or exploring magnetic fields around you, this app gives you real-time precision and easy-to-read insights. Perfect for DIY projects, construction work, home improvement, electronics testing, hobby exploration, and everyday utility use. FEATURES • Detect nearby metal objects using your iPhone’s magnetometer • Find wall studs, screws, nails, pipes, and hidden metallic objects • Real-time magnetic field readings in microtesla (µT) • Live EMF meter and magnetometer graph visualization • Signal confidence indicator for stronger detections • Axis-based directional detection system • Smooth real-time graphing of magnetic field activity • Minimal, clean, and professional interface • Fast and lightweight performance • Works instantly with supported iPhones HOW IT WORKS The app uses your iPhone’s built-in magnetometer sensor to measure magnetic field strength. When metal or magnetic objects are nearby, the magnetic field changes and the app displays the variation in real time. You can use Metal Detector to: • Locate metal studs in walls • Find hidden screws or nails • Detect magnetic interference • Measure EMF activity around electronics • Explore magnets and magnetic fields • Scan objects for metallic presence GREAT FOR • DIY & home improvement • Construction & renovation • Electricians & technicians • Hobbyists & explorers • Educational science experiments • Everyday utility detection IMPORTANT NOTES • Accuracy depends on your iPhone’s magnetometer sensor • Best results occur with ferromagnetic metals like iron and steel • Does not work for non ferrous metal like Aluminum, gold, silver • Thick walls or heavy interference can affect readings • Remove magnetic phone accessories for improved accuracy Download Metal Detector today and transform your iPhone into a smart magnetic field scanner, EMF reader, and stud finder tool. Terms of service - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Trumpet Level1 screens
Metal Detector・EMF Reader3 screens

Verdict

The call

The clearest difference is in-app purchases: Trumpet Level at none against Metal Detector・EMF Reader's 1. Metal Detector・EMF Reader's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement 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

Both are free to download. Metal Detector・EMF Reader sells 1 one-off in-app purchase. Trumpet Level asks for nothing beyond the download.

UpkeepUpdate frequency

Trumpet Level ships an update every 2 weeks, Metal Detector・EMF Reader weekly. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Trumpet Level versus Metal Detector・EMF Reader: the parameters behind the verdict, then further details
ParameterTrumpet LevelMetal Detector・EMF Reader
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 2 weeksWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPod — betteriPhone
Requires iOS15.8.3 — better16.6
Further details — not scored
Size39 MB18 MB
Age rating4+4+
DeveloperHideaki UchikoshiYash Mandhyan

In-app purchases

None

Trumpet Level

No in-app purchases

1 purchases

Metal Detector・EMF Reader

One-time1
  • Lifetime Access$2.99

Questions

Is Trumpet Level free?
Trumpet Level is free to download, with no in-app purchases.
Is Metal Detector・EMF Reader free?
Metal Detector・EMF Reader is free to download, with in-app purchases available.
Do Trumpet Level or Metal Detector・EMF Reader have ads?
Trumpet Level shows ads; Metal Detector・EMF Reader does not.
Which is updated more often, Trumpet Level or Metal Detector・EMF Reader?
Trumpet Level ships an update every 2 weeks, and Metal Detector・EMF Reader weekly. Most recently, Trumpet Level was updated on October 15, 2026 and Metal Detector・EMF Reader on October 25, 2026.

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