Comparison

Chemical Engineering AppSuite HD vs DoE Toolkit

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

Head to head
About

Chemical Engineering AppSuite HD

This comprehensive app suite offers a vast array of tools for chemical engineers, chemists, and students. It includes unit converters, physical property calculations, thermodynamic equations, and specialized calculators for fluid dynamics and more. Access a chemical database, periodic table, and graphing tools.

Highlights
  • Steam table calculations
  • Chemical database (1000+ compounds)
  • Extensive unit converters
  • Physical property calculations
  • Fluid dynamics & process control tools
  • Thermodynamic equations of state
  • Vapor-liquid equilibrium prediction
Features
Read full description

There are many unit conversion apps and there are many calculator apps... There are even chemistry apps and engineering apps... but there is only one Chemical Engineering AppSuite!!! Chemical Engineering AppSuite for iPad and iPhone has been developed by a team of chemical engineers for both professionals and students. This one-of-a-kind app features many equations and data used by chemical engineers, chemists and other engineers and integrates them with unprecedented functionality! And yes, we have also unit converters and graphing calculators. The app is also great for any high school or college student in science and math courses. Professionals will also find it very useful! Anyone with an interest in science, chemistry, math or engineering can find ways to use Chemical Engineering AppSuite HD! Highlights of the app include: Full steam table calculations based on IAPWS95 model. Database with 1000+ common industrial and laboratory chemicals Unit converters for temperature, pressure, length, area, time, and many, many more. Select your favorites for quick access! Physical property calculations for more than 1000 compounds and elements including densities, vapor pressures, heat capacities, viscosities. "ChemE Tools" for rapidly solving problems in fluid dynamics, process controls, mass/mole calculations and combustion reactions! Periodic table of the elements with a high-resolution, zoomable view Thermodynamic Equations of State: Rapidly solve for any variable in ideal gas, Peng-Robinson, van der Waals, SRK, and others. Calculation of compressibility factors and graphing of individual compressibility charts via the Lee-Kesler model Binary vapor-liquid equilibrium prediction with graphing via Raoult's Law (ideal) or Wilson Model (real). Over 675 pairs possible in the Wilson Model. Spreadsheet, statistics, and graphing tools with a built in graphing calculator! (iPad only). The iPhone version includes a very useful calculator as well! Matrix tools and linear equation solvers. Randomized practice problems for mass balances. Get data from the app and share via PDF, photos and Twitter. Follow us on Twitter and send us your feedback and suggestions for new content: @Vector254 Check out our other apps: Engineering Unit Converter and ODEsseus - Numerical Solver for Differential Equations.

About

DoE Toolkit

This application offers tools for generating and optimizing experimental designs across various methodologies. It allows for customization of design display, randomization, and replication, with export options for spreadsheet compatibility.

Highlights
  • Generate classic experimental designs
  • Optimize experimental runs
  • Randomize, replicate, and block designs
  • Add central and axial points
  • Customize design display with colors
  • Export designs to CSV format
Features
Read full description

The DoE Toolkit provides designer tools that allow you to generate classic experimental designs for the following methodologies: Screening: Full Factorial and Fractional Factorial Response Surface: Central Composite and Box-Behnken Mixture Orthogonal In addition, the DoE Toolkit includes an optimizer tool, which allows you to find an optimal subset of runs based on a design already generated using one of the designer tools. The DoE Toolkit allows you to augment any design by randomizing, replicating, and/or blocking. You can also add central points as well as axial points. You can control the way in which a generated design is displayed in the usual ways, by displaying factor levels as values or as factor level indices. Unique to the DoE Toolkit , you can also assign colors to factor levels and display a generated design using colors to represent factor levels. You can export any generated design to text (comma-separated value form), thereby making it easy to import your design into any spreadsheet or statistical analysis app.

Screenshots

Chemical Engineering AppSuite HD4 screens
DoE Toolkit4 screens

Verdict

The call

The clearest difference is price: Chemical Engineering AppSuite HD at $0.99 against DoE Toolkit's $9.99. Chemical Engineering AppSuite HD also leads on update cadence (every 2 months vs every 21 months) and ratings volume (81 vs 1). DoE Toolkit's advantage is rating (5.0 vs 4.6). On 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

Chemical Engineering AppSuite HD costs $0.99 and DoE Toolkit $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

DoE Toolkit holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Chemical Engineering AppSuite HD has 81 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Chemical Engineering AppSuite HD ships an update every 2 months, DoE Toolkit every 21 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard7 real differences · 4 level
Chemical Engineering AppSuite HD versus DoE Toolkit: the parameters behind the verdict, then further details
ParameterChemical Engineering AppSuite HDDoE Toolkit
Price$0.99 — better$9.99
Rating4.6 (81 ratings)5.0 (1 ratings) — better
Positive reviews86.1% of reviews—
Number of ratings81 — better1
Update frequencyEvery 2 months — betterEvery 21 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases — betterPaid
Best chart rank#199 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS7.1 — better14.5
Further details — not scored
Size46 MB13 MB
Age rating4+4+
DeveloperVector 254 LLCKal-El Software

Bugs and requests

Chemical Engineering AppSuite HD

Reported bugs

11 issues
  • App shuts down when using converter
  • Conversion tables not working with new iOS versions
  • Unit converter not working
  • App crashes with iOS 11
  • App crashes on iOS 7.x
Show 6 more
  • Converter doesn't convert gallons to barrels correctly
  • 1 gallon not equal to 8 pints
  • Barrel of oil conversion factor is incorrect
  • Time converter converting hours to days incorrectly
  • Area units converter needs fixing
  • Graphical bugs when changing tools/graphs

Requested features

20 requests
  • Add Internal Energy
  • Save imperial units as default
  • Add more ranges for Antoine constants
  • Functions for choosing equations of state
  • Add conical frustum volume calculator
Show 15 more
  • Add liquid level calculator
  • Add concentration section to conversions
  • Add more steam tables for common compounds (ammonia, R-134a)
  • Include unit operators and their functions
  • Include examples of industrial processes
  • Include PFD and P&ID information
  • Include quizzes and answers
  • Add a built-in scientific calculator
  • Fix area units converter
  • Fix time converter
  • Reference for calculations
  • Add butane and other common compounds
  • Consistent use of preferred units
  • Obtain temperature from entropy and pressure data for cycle problems
  • Add Raul's Law

DoE Toolkit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Chemical Engineering AppSuite HD

No in-app purchases

None

DoE Toolkit

No in-app purchases

Questions

Is Chemical Engineering AppSuite HD free?
Chemical Engineering AppSuite HD costs $0.99, with no in-app purchases.
Is DoE Toolkit free?
DoE Toolkit costs $9.99, with no in-app purchases.
Which has better reviews, Chemical Engineering AppSuite HD or DoE Toolkit?
DoE Toolkit is rated higher. Chemical Engineering AppSuite HD averages 4.6 out of 5 from 81 ratings, while DoE Toolkit averages 5.0 from 1 ratings.
Do Chemical Engineering AppSuite HD or DoE Toolkit have ads?
Neither Chemical Engineering AppSuite HD nor DoE Toolkit shows ads.
Which is updated more often, Chemical Engineering AppSuite HD or DoE Toolkit?
Chemical Engineering AppSuite HD ships an update every 2 months, and DoE Toolkit every 21 months. Most recently, Chemical Engineering AppSuite HD was updated on October 26, 2026 and DoE Toolkit on October 27, 2026.

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