Comparison

Chemical Engineering Formulate vs MyPi.

Price, ratings, monetisation and update history for both apps, side by side — 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

MyPi.

Control your Raspberry Pi's GPIO pins remotely from your iPhone or iPad. Manage 8 output pins via the app or physical switches, perfect for home automation. Connect to multiple Raspberry Pis easily without needing IP addresses.

Highlights
  • Control 8 output pins
  • Input pin control via switches
  • Setup up to 4 Raspberry Pis
  • Email-based Pi connection
  • Home automation projects
Features
Read full description

Control your Raspberry Pi GPIO with any iPhone or iPad: Control 8 output pins via App or via 8 switches connected to the input pins. Ideal for small home automation projects. Setup up to 4 different Pis. Connect you Pi using your email instead IP Address. * Check the help page for instructions. Download MyPi TCP server script from : http://www.ioslinks.com/mypi/server.zip Installation & usage guide: http://www.ioslinks.com/mypi/en/

Screenshots

Chemical Engineering Formulate4 screens
MyPi.4 screens

Verdict

The call

The clearest difference is review sentiment: MyPi. at 69% against Chemical Engineering Formulate's 0%. MyPi. also leads on price (Free vs $4.99) and update cadence (every 2 months vs every 8 months). Chemical Engineering Formulate's advantage is ads (none vs shown). On 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

MyPi. is free to download; Chemical Engineering Formulate costs $4.99 up front. Chemical Engineering Formulate sells 1 one-off in-app purchase and MyPi. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Chemical Engineering Formulate ships an update every 8 months, MyPi. every 2 months. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
Chemical Engineering Formulate versus MyPi.: the parameters behind the verdict, then further details
ParameterChemical Engineering FormulateMyPi.
Price$4.99Free — better
Rating—4.2 (37 ratings) — better
Positive reviews0.0% of reviews68.6% of reviews — better
Number of ratings—37 — better
Update frequencyEvery 8 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.611.0 — better
Further details — not scored
Size19 MB12 MB
Age rating4+4+
DeveloperHistorycentral.comKobi Snir

Customer experience

Chemical Engineering Formulate

Written reviews7 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

MyPi.

All ratings37 ratings
Positive75.7%
Neutral18.9%
Negative5.4%
Written reviews35 reviews
Positive68.6%
Neutral11.4%
Negative20.0%

In-app purchases

1 purchases

Chemical Engineering Formulate

One-time1
  • Chemistry Pro$3.99
1 purchases

MyPi.

One-time1
  • Remove Ads$19.99

Questions

Is Chemical Engineering Formulate free?
Chemical Engineering Formulate costs $4.99, and also offers in-app purchases.
Is MyPi. free?
MyPi. is free to download, with in-app purchases available.
Do Chemical Engineering Formulate or MyPi. have ads?
MyPi. shows ads; Chemical Engineering Formulate does not.
Which is updated more often, Chemical Engineering Formulate or MyPi.?
Chemical Engineering Formulate ships an update every 8 months, and MyPi. every 2 months. Most recently, Chemical Engineering Formulate was updated on October 18, 2026 and MyPi. on October 15, 2026.

Other comparisons