Comparison

Metal Detector・EMF Reader vs PuzzleLens

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

Head to head
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/

About

PuzzleLens

Features
Read full description

Getting stuck is the tiring part of a jigsaw. Hunting for one piece across a 1000-piece picture takes minutes — and the piece usually isn't where you're looking. PuzzleLens shortens that. You scan the puzzle's picture once, then photograph whatever piece you're stuck on, and the app tells you where it goes. **As much hint as you want, as little as you want** You don't have to see the answer straight away. Ask for the region first, narrow it down, and only then ask for the exact cell and which way the piece turns. How much help you take is your choice — and how many hints a puzzle took is kept in your records. **It says so when it isn't sure** Sky, water, flat colour areas… some pieces genuinely can't be told apart on their own. Rather than inventing an answer, PuzzleLens shows you a region and says it isn't sure. You learn which areas will be hard while you're still setting the puzzle up. **Everything on your device** Piece recognition runs entirely on your iPhone. No internet needed, and your photos don't go anywhere. **Your puzzle gallery** In progress, finished, set aside. Every puzzle gets a progress mosaic: placed pieces in colour, the rest dimmed. One picture that tells you where you left off. **With friends** Sign in if you want, add friends and share your progress. No account is needed to solve puzzles — the social side is entirely optional and free. **Your way** Light or dark theme, English or Turkish — all switchable inside the app, instantly. **Free, or go Pro** Unlimited puzzles, scans and hints — no daily limit. The app is supported by ads shown after scans. PuzzleLens Pro removes ads entirely. Pro is a monthly auto-renewing subscription; the price is shown in the app and on the App Store. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage and cancel it in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://alperensaglam.github.io/puzzlelens/privacy

Screenshots

Metal Detector・EMF Reader3 screens
PuzzleLens4 screens

Verdict

The call

The clearest difference is in-app purchases: PuzzleLens at none against Metal Detector・EMF Reader's 1. Metal Detector・EMF Reader's advantage is ads (none vs shown) and iOS requirement (16.6 vs 18.0). On price, update cadence 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

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

UpkeepUpdate frequency

Metal Detector・EMF Reader ships an update weekly, PuzzleLens every 8 days. Both last shipped on October 12, 2026.

Scorecard3 real differences · 7 level
Metal Detector・EMF Reader versus PuzzleLens: the parameters behind the verdict, then further details
ParameterMetal Detector・EMF ReaderPuzzleLens
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 8 days
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.6 — better18.0
Further details — not scored
Size18 MB7 MB
Age rating4+4+
DeveloperYash MandhyanAlperen Saglam

In-app purchases

1 purchases

Metal Detector・EMF Reader

One-time1
  • Lifetime Access$1.99
None

PuzzleLens

No in-app purchases

Questions

Is Metal Detector・EMF Reader free?
Metal Detector・EMF Reader is free to download, with in-app purchases available.
Is PuzzleLens free?
PuzzleLens is free to download, with no in-app purchases.
Do Metal Detector・EMF Reader or PuzzleLens have ads?
PuzzleLens shows ads; Metal Detector・EMF Reader does not.
Which is updated more often, Metal Detector・EMF Reader or PuzzleLens?
Metal Detector・EMF Reader ships an update weekly, and PuzzleLens every 8 days. Most recently, Metal Detector・EMF Reader was updated on October 12, 2026 and PuzzleLens on October 12, 2026.

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