Magnetometer vs Diamond Grader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Magnetometer
Transform your device into a precise electromagnetic field detector. Ideal for electrical safety checks, scientific exploration, and environmental monitoring with real-time readings and historical data.
- Real-time EMF detection
- Historical trend charts
- Customizable alerts
- Data export
- Multiple units support
- Adjustable sampling rates
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Magnetometer turns your device into a precise electromagnetic field (EMF) detector using the built-in magnetometer sensor. Perfect for electrical safety checks, scientific exploration, and environmental monitoring. ONE-TIME PURCHASE - NO SUBSCRIPTION FEES, NO IN-APP PURCHASES, NO ADS Professional Features: • Real-time EMF detection with live updates • Beautiful circular gauge with color-coded intensity levels • Historical trend charts for pattern analysis • Customizable alert thresholds and notifications • Data export for further analysis • Multiple units support (µT and Gauss) • Adjustable sampling rates and smoothing Key Applications: • Electrical safety inspections • Scientific research and education • Environmental EMF monitoring • Electronics troubleshooting • Educational demonstrations Advanced Tools: • Save and review measurement sessions • Export data in standard formats • Customizable sensitivity settings • Professional-grade calibration • Clean, intuitive interface designed for both beginners and experts The app provides accurate readings using your device's built-in magnetometer, displaying measurements in both microtesla (µT) and Gauss units. The intuitive interface makes it easy to monitor electromagnetic fields in your environment. Pay once, own forever. No hidden costs, no subscriptions, no advertisements. Full functionality included with your purchase. Note: Accuracy depends on your device's sensor capabilities. This app is designed for educational and monitoring purposes. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Diamond Grader
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Know what you're looking at. Diamond Grader turns the camera in your pocket into a jeweller's loupe. Photograph a diamond and advanced AI vision examines what your images genuinely show — then tells you, plainly, what they cannot. THE CAPTURE STUDIO A guided camera built for stones. Frame the diamond inside the loupe and get live coaching on light, focus, reflections and framing. The face-up shot is the only one needed. Crown, profile, detail, certificate and UV are optional, and each one raises confidence. YOUR ASSESSMENT • The 4Cs — apparent colour range, clarity range, cut characteristics and carat • Ranges rather than false precision, with a confidence level on every finding • Visible inclusions and blemishes, each labelled by how certain it really is • AI Loupe — zoom deep into your photograph, with findings marked where they were seen • Symmetry, proportions, polish and fluorescence indications • Market insights, given as ranges, in your currency • Buying insights: strengths, concerns, and the questions worth asking a seller • Selling insights: how to describe a stone honestly and position it well • Compare against a grading report you already hold • A shareable report, and your full history kept on your device HONEST BY DESIGN Photographs have limits, and this app says so. Where the evidence isn't there you get "insufficient evidence" rather than a guess. A weight you supply is never overwritten by an estimate. Nothing is ever presented as a certified grade. WHAT THIS IS NOT This is an AI visual assessment of photographs. It is not a laboratory grading report and it is not an appraisal. It cannot determine whether a stone is natural, laboratory-grown, a simulant, or treated — no photograph can. It does not replace physical examination, or a report from an accredited gemmological laboratory. Diamond Grader is not affiliated with, or endorsed by, any gemmological laboratory. LEARN Free, always: the 4Cs, diamond shapes, understanding inclusions, natural versus laboratory-grown, fluorescence, certificates, pricing, buying safely, and how to photograph a diamond well. PRIVACY Photographs you choose to assess are sent over an encrypted connection to an AI provider for processing. You are asked to consent before this happens for the first time, and you can withdraw that consent at any time in Settings. Your photographs, reports and notes are stored on your device. DIAMOND GRADER PRO Assessments are a subscription feature. There are no free assessments and no free trial. • Pro Weekly — billed every week • Pro Monthly — billed every month • Pro Annual — billed every year (best value) Pricing is shown in your local currency inside the app, before any purchase is made. Pro unlocks unlimited assessments, the AI Loupe, market insights, certificate comparison, shareable reports and your full assessment history. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Privacy Policy: https://angelapplications.co.uk/privacy-policy/ Terms of Use: https://angelapplications.co.uk/terms-of-use/ Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions or feedback: contact@angelapplication.co.uk
Screenshots
Verdict
The clearest difference is price: Diamond Grader at Free against Magnetometer's $1.99. Magnetometer's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 18.0). On ads 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
Diamond Grader is free to download; Magnetometer costs $1.99 up front. Diamond Grader sells 3 in-app purchases, starting at $6.99 per 7 days. Magnetometer asks for nothing beyond the download.
| Parameter | Magnetometer | Diamond Grader |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 23 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | SootheTrail Solutions LLC | Angel App Publishing Ltd. |
In-app purchases
Magnetometer
No in-app purchases
Diamond Grader
- Weekly Subscription$6.997 Days
- Monthly Subscription$12.991 Month
- Annual Subscription$59.991 Year
Questions
Is Magnetometer free?
Is Diamond Grader free?
Do Magnetometer or Diamond Grader have ads?
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