CORE Calculator App vs Stud Finder®
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CORE Calculator App
This app provides inspectors in the oil and gas industry with essential calculations for asset integrity. It offers tools for determining Tmin, MAWP, corrosion rates, and remaining life based on industry standards.
- Tmin calculations
- MAWP calculations
- Corrosion rate calculations
- Remaining life determination
- Construction material information
- Damage mechanism identification
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AsInt delivers asset integrity solutions globally within the Oil and Gas Upstream, Midstream, Downstream, and Petrochemical industries. With our CORE Calculator mobile app, you have quick and easy calculator to assist API 510/570 Inspectors in calculating Tmin, MAWP, Corrosion Rates, Remaining life, etc. We use industry recognized codes and standards as the basis of all our software solutions. The app is designed to take common inspection and engineering calculations and make them available and accessible on your mobile device. Here are a few things that you can do from this mobile app: - Access comprehensive and updated information on construction materials. - Perform precise calculations based on operating details. - Identify probable damage mechanisms. - Determine remaining life based on thickness data. - Calculate corrosion rates with precision. - Seamless assessment of damage susceptibilities. and much more. Get started NOW! This CORE Calculator app is provided by AsInt, Inc. "AS IS" and AsInt takes no responsibilities or warranties of any kind concerning the safety, suitability of the calculations for your purpose, accuracy of your data, inaccuracies of user's application, or any other misuse of this application. There are inherent dangers in the use of any software, and you are solely responsible for determining the compatibility of this application with your equipment. Ensure that the industry codes and standards used as the basis of this application are applicable in your jurisdiction. We are committed to protecting and respecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our CORE Calculator mobile application. We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. You are advised to review this Privacy Policy periodically for any changes. Changes to this Privacy Policy are effective when they are posted on this page. By using the CORE Calculator mobile application, you agree to our terms and conditions stating Acceptance of Terms, Use of the App, Prohibited Uses, Disclaimer of Warranties, etc. For more information on Privacy Policy : https://asint.online/privacy-policy and Terms of Use : https://asint.net/mobiletermandconditions/ Contact us : info@asint.net
Stud Finder®
This utility app uses your iPhone's magnetometer to detect metal studs behind walls. Simply hold your device near the wall and observe the indicator for changes in the magnetic field. For best results, remove any external case from your phone.
- Detect metal studs
- Uses magnetometer
- Measures magnetic field
- Indicator for metal proximity
- Instructions for accuracy
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Find the right spot. Mount with confidence. Turn your iPhone into a handy magnetic stud finder. Use your device’s built-in magnetic sensor to locate magnetic changes that may indicate screws, nails, or other ferrous metal behind a wall. Follow the needle, watch the live graph, and hear stronger signals as you scan. Try Pro with a 3-day free trial on the Weekly plan for eligible new subscribers. FEATURES • Unlimited Scanning (Pro Required) Scan without measurement time limits or interruptions. • Live Signal Gauge & Graph (Pro Required) See magnetic changes through a responsive needle and a live graph with X, Y, and Z readings. • Adjustable Sensitivity (Pro Required for Scanning) Fine-tune the detector’s response to suit your surroundings. • Sound & Haptic Detection (Pro Required) Keep your attention on the wall. Faster beeps and firmer haptic feedback help you follow stronger signals. Turn both off whenever you prefer. • Simple, Illustrated Instructions Learn how to prepare the sensor, scan steadily, and look for signal peaks with a three-step guide. • Flexible Viewing (Pro Required for Scanning) Scan in portrait or landscape, with layouts adapted for iPhone and iPad. START WITH A FREE TRIAL Explore Pro with a 3-day free trial on the Weekly subscription, subject to eligibility. Weekly and Yearly plans are available. Pricing and trial availability are shown before purchase. Subscriptions renew automatically unless canceled before renewal through your App Store account settings. PLEASE NOTE Stud Finder detects magnetic field changes; it does not directly detect wood. Results depend on your device, distance, metal type, and nearby magnetic interference. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: CORE Calculator App at 100% against Stud Finder®'s 8%. CORE Calculator App also leads on rating (5.0 vs 4.4). Stud Finder®'s advantage is ratings volume (23K vs 11) and update cadence (every 5 weeks vs every 3 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. CORE Calculator App sells 3 in-app purchases, starting at $4.99 per month and Stud Finder® sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
CORE Calculator App holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Stud Finder® has 23K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 100% of CORE Calculator App's written reviews are positive against 8% of Stud Finder®'s.
CORE Calculator App ships an update every 3 months, Stud Finder® every 5 weeks. The most recent releases landed on October 17, 2026 and October 23, 2026 respectively.
| Parameter | CORE Calculator App | Stud Finder® |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (11 ratings) — better | 4.4 (23K ratings) |
| Positive reviews | 100.0% of reviews — better | 7.9% of reviews |
| Number of ratings | 11 | 23K — better |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 148 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | AsInt Inc. | Tue Nguyen Minh |
Customer experience
CORE Calculator App
Stud Finder®
Bugs and requests
CORE Calculator App
Not enough reviews yet to summarise bugs or requests.
Stud Finder®
Reported bugs
3 issues- Fails to detect known metal objects
- Erratic behavior and constant beeping
- Upgrade issues even after purchase
Requested features
3 requests- Ability to detect wooden studs
- Longer free trial period
- More intuitive user interface
In-app purchases
CORE Calculator App
- Materials Lookup$4.991 Month
- Damage Mech Screener$9.991 Month
- Materials Lookup$5.99
Stud Finder®
- Stud Finder Pro (Weekly)3 Days trial$1.997 Days
- Pro Features$1.99
Questions
Is CORE Calculator App free?
Is Stud Finder® free?
Which has better reviews, CORE Calculator App or Stud Finder®?
Do CORE Calculator App or Stud Finder® have ads?
Which is updated more often, CORE Calculator App or Stud Finder®?
Other comparisons
