Comparison

Chemical Engineering Formulate vs Two Phase Separator Lite

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

Head to head
About

Chemical Engineering Formulate

This comprehensive reference tool provides over 1,500 formulas, calculators, and conversion charts for chemical engineering professionals and students. It covers a wide range of topics including heat transfer, fluid mechanics, and reaction kinetics, with support for both US and Metric units.

Highlights
  • 1,500+ formulas and calculators
  • 700+ engineering calculators
  • US/Metric unit toggle
  • Dual-unit display
  • Searchable reference tables
  • Offline functionality
  • Save and share calculations
Features
Read full description

CHEMICAL ENGINEER is the essential tool for Chemical Engineers, Process Engineers, and engineering students. With over 1,500 formulas and calculators, this is the most comprehensive chemical engineering reference app available. The app features 700+ engineering calculators across 50 categories, 750 conversion formulas, 8 temperature scales, and 14 reference tables. All formulas support US and Metric (SI) units with one-tap toggle and dual-unit display. CORE CHEMICAL ENGINEERING - Heat Transfer -- LMTD, overall heat transfer, fin efficiency, radiation, Fourier's law - Fluid Mechanics -- Reynolds number, Bernoulli, Darcy-Weisbach, Hagen-Poiseuille - Thermodynamics -- Ideal gas, Clausius-Clapeyron, Antoine equation, compressibility - Reaction Kinetics -- Arrhenius equation, rate laws, CSTR/PFR design, Levenspiel - Mass Transfer -- Fick's law, mass transfer coefficients, wetted wall columns - Distillation -- McCabe-Thiele, Fenske, Underwood, relative volatility - Dimensionless Numbers -- Reynolds, Nusselt, Prandtl, Schmidt, Sherwood, Grashof UNIT OPERATIONS Filtration, Packed/Fluidized Beds, Compressor Sizing, Mixing, Cooling Towers, Membrane Separation, Crystallization, Liquid-Liquid Extraction, Adsorption PROCESS & SAFETY Process Economics, Process Control, Safety Engineering, Corrosion and Electrochemistry ENVIRONMENTAL Air Quality, River/Lake/Soil Pollution, Infiltration and Recharge, Evaporation, Waste ADDITIONAL CATEGORIES Piping (70), Pressure Stress (109), Material Weight (101), Area Formulas (60), Flat Plates, Pumps, Pump Laws, Steam, Crusher, Vapor Separators, Equilibrium, Cogeneration, and more CONVERSIONS BTU, Cubic, Flows, Ft-Lbs, Horsepower, HVAC, Hydraulic, Linear, Liquid, Metric (460), Power, Pressures, Square Measures, Watts, Weights TEMPERATURE SCALES Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Newton, Delisle, Romer 14 REFERENCE TABLES Chemical Properties, Steam Tables, Pipe Schedules, Material Densities, pH Scale, Engineering Constants, Chemical Resistance, Water Quality, Critical Properties, Antoine Constants, Heat Transfer Coefficients, Dimensionless Numbers, Gas Properties, Flammability Limits FEATURES - US/Metric toggle with dual-unit display - Save calculations and favorites - Share and export results - Searchable reference tables - Dark mode interface - Works offline Don't see a formula you need? Email us and we'll include it in the next update.

About

Two Phase Separator Lite

Features
Read full description

This is the lite version of the equipment sizing app which provides the two-phase separator design for various process conditions. The results for two different approaches, i.e. York Demister and Theoretical, are presented for demonstration of the full version app. Please refer to my website at http://salvasolution.com for background information and technical support. Ali P. Laleh, PhD, P.Eng.

Screenshots

Chemical Engineering Formulate4 screens
Two Phase Separator Lite4 screens

Verdict

The call

The clearest difference is price: Two Phase Separator Lite at Free against Chemical Engineering Formulate's $4.99. Two Phase Separator Lite also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 18.6). Chemical Engineering Formulate's advantage is update cadence (every 8 months vs every 35 months). On ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Two Phase Separator Lite is free to download; Chemical Engineering Formulate costs $4.99 up front. Chemical Engineering Formulate sells 1 one-off in-app purchase. Two Phase Separator Lite asks for nothing beyond the download.

UpkeepUpdate frequency

Chemical Engineering Formulate ships an update every 8 months, Two Phase Separator Lite every 35 months. The most recent releases landed on October 18, 2026 and October 9, 2026 respectively.

Scorecard4 real differences ยท 4 level
Chemical Engineering Formulate versus Two Phase Separator Lite: the parameters behind the verdict, then further details
ParameterChemical Engineering FormulateTwo Phase Separator Lite
Price$4.99Free โ€” better
Positive reviews0.0% of reviewsโ€”
Update frequencyEvery 8 months โ€” betterEvery 35 months
AdsNoNo
In-app purchasesYesNo โ€” better
MonetizationPaidโ€”
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS18.611.0 โ€” better
Further details โ€” not scored
Size19 MB27 MB
Age rating4+4+
DeveloperHistorycentral.comAli Pourahmadi Laleh

In-app purchases

1 purchases

Chemical Engineering Formulate

One-time1
  • Chemistry Pro$3.99
None

Two Phase Separator Lite

No in-app purchases

Questions

Is Chemical Engineering Formulate free?
Chemical Engineering Formulate costs $4.99, and also offers in-app purchases.
Is Two Phase Separator Lite free?
Two Phase Separator Lite is free to download, with no in-app purchases.
Do Chemical Engineering Formulate or Two Phase Separator Lite have ads?
Neither Chemical Engineering Formulate nor Two Phase Separator Lite shows ads.
Which is updated more often, Chemical Engineering Formulate or Two Phase Separator Lite?
Chemical Engineering Formulate ships an update every 8 months, and Two Phase Separator Lite every 35 months. Most recently, Chemical Engineering Formulate was updated on October 18, 2026 and Two Phase Separator Lite on October 9, 2026.

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