ROL Assistant vs CORE Calculator App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ROL Assistant
This utility app provides a virtual advisor for refining questions and offers extensive unit conversion tools. It also calculates steam properties and line pressure drops for various pipe materials and sizes.
- Virtual refining advisor
- Extensive unit conversions
- Steam properties calculator
- Line pressure drop calculation
- English and Metric units
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ROL Sia: Sia virtual advisor on Refining Online®. Ask Sia your refining question for answers from the Refining Online Q&A. Unit Conversion: Length, Area, Volume, Mass, Density, Pressure, Energy, Power, Temperature, Flowrate, Viscosity, Specific Energy, Heat Flux, Heat Transfer Coefficient, Thermal Conductivity... Steam Properties: Enthalpy, Density, Heat Capacity, Viscosity, Thermal Conductivity of saturated steam, water, and superheated steam. Line Pressure Drop: Single phase line pressure drop calculation for different pipe sizes and materials in English or Metric units.
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
Screenshots
Verdict
The clearest difference is in-app purchases: ROL Assistant at none against CORE Calculator App's 3. ROL Assistant also leads on iOS requirement (11.4 vs 14.0). CORE Calculator App's advantage is ratings volume (11 vs 2). On price, rating, update cadence and ads 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. ROL Assistant asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for ROL Assistant against 5.0 for CORE Calculator App. That said, the two scores are not equally well evidenced: CORE Calculator App has 11 ratings behind it against 2, so its average is the more settled of the two.
ROL Assistant ships an update every 4 months, CORE Calculator App every 3 months. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.
| Parameter | ROL Assistant | CORE Calculator App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (11 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 11 — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.4 — better | 14.0 |
| Further details — not scored | ||
| Size | 28 MB | 148 MB |
| Age rating | 4+ | 4+ |
| Developer | Astron International, Inc. | AsInt Inc. |
Customer experience
ROL Assistant
CORE Calculator App
In-app purchases
ROL Assistant
No in-app purchases
CORE Calculator App
- Materials Lookup$4.991 Month
- Damage Mech Screener$9.991 Month
- Materials Lookup$5.99
Questions
Is ROL Assistant free?
Is CORE Calculator App free?
Which has better reviews, ROL Assistant or CORE Calculator App?
Do ROL Assistant or CORE Calculator App have ads?
Which is updated more often, ROL Assistant or CORE Calculator App?
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