Comparison

Cat Novel Author 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

Cat Novel Author

Read full description

Cat Novel Author is Cat Novel author tool version You can see many popular works here, and of course you can join them and become an excellent author

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

Cat Novel Author3 screens
Metal Detector・EMF Reader3 screens

Verdict

The call

The clearest difference is update cadence: Metal Detector・EMF Reader at weekly against Cat Novel Author's every 3 months. Cat Novel Author's advantage is iOS requirement (14.3 vs 16.6). On price, 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

Both are free to download. Cat Novel Author sells 10 one-off in-app purchases and Metal Detector・EMF Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Cat Novel Author ships an update every 3 months, Metal Detector・EMF Reader weekly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Cat Novel Author versus Metal Detector・EMF Reader: the parameters behind the verdict, then further details
ParameterCat Novel AuthorMetal Detector・EMF Reader
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPod — betteriPhone
Requires iOS14.3 — better16.6
Further details — not scored
Size65 MB18 MB
Age rating17+4+
Developer靖 伍Yash Mandhyan

In-app purchases

10 purchases

Cat Novel Author

One-time10
  • 黑貓付費服務.10$8.19
  • 黑貓付費服務.2$19.99
  • 黑貓付費服務.3$29.99
Show 7 more
  • 黑貓付費服務.6$34.99
  • 黑貓付費服務.4$59.99
  • 黑貓付費服務.7$64.99
  • 黑貓付費服務.5$99.99
  • 黑貓付費服務.8$149.99
  • 黑貓付費服務.11$299.00
  • 黑貓付費服務.9$364.99
1 purchases

Metal Detector・EMF Reader

One-time1
  • Lifetime Access$2.99

Questions

Is Cat Novel Author free?
Cat Novel Author is free to download, with in-app purchases available.
Is Metal Detector・EMF Reader free?
Metal Detector・EMF Reader is free to download, with in-app purchases available.
Do Cat Novel Author or Metal Detector・EMF Reader have ads?
Neither Cat Novel Author nor Metal Detector・EMF Reader shows ads.
Which is updated more often, Cat Novel Author or Metal Detector・EMF Reader?
Cat Novel Author ships an update every 3 months, and Metal Detector・EMF Reader weekly. Most recently, Cat Novel Author was updated on October 27, 2026 and Metal Detector・EMF Reader on October 25, 2026.

Other comparisons