PetroFrac vs Multi Search Engine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PetroFrac
This utility app calculates key properties of refinery petroleum fractions using D86 distillation and API gravity data. It provides specific gravity, molecular weight, density, viscosity, heat capacity, and enthalpy. Extrapolated values are clearly indicated.
- Calculate specific gravity
- Calculate Watson K
- Calculate molecular weight
- Calculate density at flow temperature
- Calculate viscosity at flow temperature
- Calculate heat capacity
- Calculate enthalpy
Read full descriptionHide full description
PetroFrac calculates properties of refinery petroleum fractions based on the D86 distillation and API gravity. You enter the 10%, 50% and 90% D86 distillation temperatures along with the API gravity. The program calculates: SG, Specific gravity Watson K MW, molecular weight Once you enter the flow temperature the program calculates: Density at flow temperature, g/cm3 Viscosity at flow temperature, cSt Cp, Heat capacity at flow temperature, BTU/(lb Deg F) H Liquid, Enthalpy of liquid at flow temperature, BTU/Deg F H Vapor, Enthalpy of vapor at flow temperature, BTU/Deg F Heat Vap, Heat of vaporization at flow temperature, BTU/Deg F Any values that are extrapolated beyond the ranges of the correlations are displayed in purple text. The calculations are based on: “New correlation for predicting the viscosity of heavy petroleum fractions” H. M. Moharam, R. A. Al-Mehaideb and M. A. Fahim Fuel vol. 74, 1995. I have extended the correlation range using ASTM Designation: D341 – 93 (Reapproved 1998). “New correlation predicts density of petroleum fractions” Jose Vicente Gomez, Oil and Gas Journal, July 13, 1992 “Improve Predicted Enthalpy of Fractions” M. G. Kesler and B. I. Lee Hydrocarbon Processing 55, No. 3 American Petroleum Institute Technical Data Book – Petroleum Refining
Multi Search Engine
Enhance your browsing with a powerful search tool that integrates with Safari. Switch between multiple search engines instantly from your address bar to find information faster. This utility is available for iOS, iPadOS, and macOS.
- Switch between search engines
- Integrates with Safari
- Fast search functionality
- Supports iOS, iPadOS, and macOS
- Single purchase for full features
Read full descriptionHide full description
Upgrade your Safari browsing and search experience by purchasing MultiSearchEngine. With a single purchase, you gain access to a full-featured search tool that supports iOS, iPadOS, and macOS. With MultiSearchEngine, you can significantly enhance your search efficiency within the browser, elevating your overall browsing experience. MultiSearchEngine is an extension for Safari, allowing you to conveniently switch between various search engines. For instance, you can type "bn mountain" in the address bar to quickly search "mountain" using the Bing engine, or type "bd mountain" to swiftly transition to the Baidu engine for searching "mountain", all without navigating away from your current page. - -
Screenshots
Verdict
The clearest difference is device support: Multi Search Engine at 4 against PetroFrac's 2. Multi Search Engine also leads on price ($0.99 vs $1.99). PetroFrac's advantage is ratings volume (3 vs 1). On rating, review sentiment, 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
PetroFrac costs $1.99 and Multi Search Engine $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for PetroFrac against 5.0 for Multi Search Engine. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
PetroFrac ships an update every 13 months, Multi Search Engine every 7 months. The most recent releases landed on October 5, 2026 and October 23, 2026 respectively.
| Parameter | PetroFrac | Multi Search Engine |
|---|---|---|
| Price | $1.99 | $0.99 — better |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 13 months | Every 7 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard H Street | 伟胜 林 |
Customer experience
PetroFrac
Multi Search Engine
In-app purchases
PetroFrac
No in-app purchases
Multi Search Engine
No in-app purchases
Questions
Is PetroFrac free?
Is Multi Search Engine free?
Which has better reviews, PetroFrac or Multi Search Engine?
Do PetroFrac or Multi Search Engine have ads?
Which is updated more often, PetroFrac or Multi Search Engine?
Other comparisons
