Comparison

Metal Detector & Magnetometer vs CryptKB

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

Head to head
About

Metal Detector & Magnetometer

Transform your iPhone into a professional metal detector. This app uses your device's magnetometer to detect ferrous metals with precision, ideal for finding lost objects or inspecting materials. It offers an intuitive interface with customizable sounds and themes.

Highlights
  • Uses iPhone magnetometer for detection
  • Detects ferrous metals
  • Intuitive professional interface
  • Customizable sounds and themes
  • Integrated flashlight
  • Instant use, no calibration
Features
Read full description

METAL DETECTOR PRO - 7 Modes, 1 iPhone Turn your iPhone into a professional-grade metal detector and magnetic field analyzer. MetalDetector Pro harnesses your device's built-in magnetometer to detect metal ferrous e magnet , measure electromagnetic fields, and visualize magnetic data in stunning real time — no extra hardware, no subscriptions, no limitations. ••• 7 POWERFUL MODES - SEARCH The classic metal detection experience, reimagined for modern iPhones. The app continuously reads the ambient magnetic field in microtesla (µT) and alerts you with audio beeps and haptic pulses as intensity changes. A 20-bar VU meter and three LED indicators give you instant, at-a-glance feedback. Perfect for locating hidden nails, coins, keys, electrical wiring, pipes and any ferromagnetic object beneath walls, floors or soil. • THRESHOLD Set a custom detection threshold and let the app work hands-free. Alerts fire only when the field exceeds your chosen sensitivity level — ideal when you need to focus on the surface you're scanning without watching the screen. • EMF Electromagnetic field meter mode. Identify live electrical wiring hidden inside walls, locate appliances radiating strong fields, and monitor your environment with a dedicated EMF intensity readout. A useful companion for electricians, home inspectors and the curious. • COMPASS A precision magnetic compass driven entirely by the magnetometer sensor — no GPS required. Clean neomorphic design with a smooth, real-time compass rose. Reliable heading data anywhere, even underground or indoors. • SPHERE The most visually striking mode in the app. Every sensor reading is plotted as a colored dot on a rotating 3D globe. Watch your scan history build into a living magnetic map — green for low-intensity fields, climbing through yellow and orange to alarm red as intensity rises. A mesmerizing way to understand the invisible forces around you. • DEPTH Estimate how deep a metallic source is hidden using real-time field gradient analysis. Point your iPhone at a wall, floor or patch of ground, press CALIBRATE, and receive a live distance readout in centimeters. Great for locating buried pipes, conduits and structural reinforcement. • 3D FIELD An immersive real-time particle simulation driven by the live magnetic field vector. Hundreds of animated particles drift, swirl and accelerate in response to the X, Y and Z field components. The stronger the field, the faster and more dramatic the particle storm becomes. ••• PREMIUM FEATURES ••• • Live µT readout with individual X, Y, Z axis values on a retro LCD display • 20-bar VU meter with green, yellow and red intensity zones • 3 LED indicators with progressive glow effect • Scrolling magnitude graph — last 150 samples always visible • Precision sensitivity slider with real-time signal filtering • Audible beep alerts with adjustable sensitivity • Haptic vibration feedback, independently togglable • Flashlight/torch for dark and confined environments • Auto-lock disable — screen stays on during extended scans • Neomorphic UI in both Light and Dark theme • Authentic retro LCD display with green phosphor aesthetics • Full localization: English and Italian ••• WORKS ON EVERY IPHONE No LiDAR. No external sensors. MetalDetector Pro runs on any iPhone with iOS 15 or later, using only the standard magnetometer chip built into every device. No camera permissions. No location tracking. Your data never leaves your device. ••• WHAT CAN YOU FIND? Buried metal ferrous e magnet-Nails and screws hidden in walls-Underground pipes and conduits-Live electrical cables · Lost keys and metal objects · Metal studs behind drywall · Old relics and artifacts Whether you're a DIY enthusiast, a treasure hunter, an electrician or simply curious about the invisible magnetic world around you — MetalDetector Pro delivers the most powerful, beautiful and complete magnetometer toolkit on the App Store. Download now and start exploring the world beneath the surface.

About

CryptKB

Encrypt messages and files locally on your device before sending. Use a custom keyboard or Messages extension to easily encrypt and decrypt content with a password. Your data remains private with no account creation or backend servers.

Highlights
  • Local encryption/decryption
  • Custom keyboard integration
  • Messages extension
  • AES-256-GCM encryption
  • ASCII-safe payload
  • Password saving with Face ID/passcode
Features
Read full description

CryptKB helps you encrypt message text before it leaves your iPhone or iPad. Use the custom keyboard to write a message, choose a password, and insert an encrypted payload into Messages or another text field. Or open the Messages extension to stage a CryptKB bubble inside a Messages draft. The other person can open the same payload in CryptKB and decrypt it locally with the matching password. Why people use CryptKB: - Local encrypt and decrypt on device - Custom keyboard for ordinary text fields - Messages extension for composing and opening CryptKB bubbles - AES-256-GCM encryption with PBKDF2-HMAC-SHA256 key derivation - ASCII-safe payload format for copy, paste, and sharing - Optional saved conversation passwords protected by Face ID or device passcode - No account creation, no backend relay, no analytics SDKs, and no ad tracking in the app - Built-in playground, settings, privacy notes, and diagnostics How it works: 1. Switch to CryptKB Keyboard. 2. Type your message. 3. Enter a password. 4. Tap Encrypt & Insert. 5. Review the encrypted text and tap Send yourself. To decrypt, paste or open a CryptKB payload, enter the matching password, and read the plaintext locally. CryptKB intentionally reveals decrypted text in a local panel instead of writing it back into the conversation automatically. Important platform notes: - Apple does not allow third-party keyboards to tap the host app's Send button, so sending is always manual. - Password recovery is not possible by design. - CryptKB protects message content inside its encrypted payload, not message metadata like recipients, timestamps, screenshots, or notification previews.

Screenshots

Metal Detector & Magnetometer4 screens
CryptKB4 screens

Verdict

The call

The clearest difference is price: CryptKB at Free against Metal Detector & Magnetometer's $1.99. CryptKB also leads on rating (5.0 vs 1.0). On ratings volume, 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

CryptKB is free to download; Metal Detector & Magnetometer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CryptKB holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard3 real differences · 7 level
Metal Detector & Magnetometer versus CryptKB: the parameters behind the verdict, then further details
ParameterMetal Detector & MagnetometerCryptKB
Price$1.99Free — better
Rating1.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews53.6% of reviews—
Number of ratings11
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS18.617.0 — better
Further details — not scored
Size11 MB5 MB
Age rating4+4+
DeveloperAndy SoftSeth Farrington18896201822

Customer experience

Metal Detector & Magnetometer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews28 reviews
Positive53.6%
Neutral0.0%
Negative46.4%

CryptKB

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Metal Detector & Magnetometer

No in-app purchases

None

CryptKB

No in-app purchases

Questions

Is Metal Detector & Magnetometer free?
Metal Detector & Magnetometer costs $1.99, with no in-app purchases.
Is CryptKB free?
CryptKB is free to download, with no in-app purchases.
Which has better reviews, Metal Detector & Magnetometer or CryptKB?
CryptKB is rated higher. Metal Detector & Magnetometer averages 1.0 out of 5 from 1 ratings, while CryptKB averages 5.0 from 1 ratings.
Do Metal Detector & Magnetometer or CryptKB have ads?
Neither Metal Detector & Magnetometer nor CryptKB shows ads.

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