DWSIM Simulator vs Lumeli
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DWSIM Simulator
This app provides a powerful offline chemical process simulation tool. It allows engineers to build complex process models, perform thermodynamic calculations, and analyze various unit operations. Features include a touch-enabled PFD interface, extensive compound databases, and advanced calculation engines.
- Offline chemical process simulation
- Touch-enabled PFD drawing interface
- Extensive thermodynamic models
- Compound database for 1500+ compounds
- Unit operation models
- Chemical reaction and reactor support
- Flowsheet parametric studies
Read full descriptionHide full description
DWSIM Simulator is a Steady-State Chemical Process Simulator, featuring: - Offline functionality: no need to connect to online databases or servers, DWSIM runs completely offline on your device, wherever you are! - Touch-enabled Process Flowsheet Diagram (PFD) Drawing Interface: A hardware-accelerated PFD interface with touch support allows Chemical Engineers to build complex process models in a few minutes - VLE/VLLE/SVLE/SVLLE calculations using Equation of State and Activity Coefficient models: calculate fluid properties and phase distribution with advanced thermodynamic models - Compound database with extensive data for more than 1500 compounds - Rigorous Thermodynamic Models*: PC-SAFT EOS, GERG-2008 EOS, Peng-Robinson EOS, Soave-Redlich-Kwong EOS, Lee-Kesler-Plöcker, Chao-Seader, Modified UNIFAC (Dortmund), UNIQUAC, NRTL, Wilson, Raoult's Law and IAPWS-IF97 Steam Tables - Thermophysical state (phase) properties: Enthalpy, Entropy, Internal Energy, Gibbs and Helmholtz Free Energies, Compressibility Factor, Isothermal Compressibility, Bulk Modulus, Speed of Sound, Joule-Thomson Expansion Coefficient, Density, Molecular Weight, Heat Capacity, Thermal Conductivity and Viscosity - Single-compound properties: Critical Parameters, Acentric Factor, Chemical formula, Structure formula, CAS Registry Number, Boiling Point Temperature, Vapor Pressure, Heat of Vaporization, Ideal gas Enthalpy, Ideal gas Enthalpy of Formation at 25 C, Ideal Gas Gibbs Free Energy of Formation at 25 C, Ideal Gas Entropy, Heat Capacity Cp, Ideal Gas Heat Capacity, Liquid Heat Capacity, Solid Heat Capacity, Heat Capacity Cv, Liquid Viscosity, Vapor Viscosity, Liquid Thermal Conductivity, Vapor Thermal Conductivity, Solid Density, Liquid Density and Molecular Weight - Comprehensive Unit Operation Model set*, including Mixer, Splitter, Separator, Pump, Compressor, Expander, Heater, Cooler, Valve, Shortcut Column, Heat Exchanger, Component Separator, Pipe Segment, Rigorous Distillation and Absorption Columns, Wind Turbine, Hydroelectric Turbine, Water Electrolyzer and Solar Panel - Support for Chemical Reactions and Reactors*: DWSIM features support for Conversion, Equilibrium and Kinetic reactions, together with their respective Reactor models - Flowsheet Parametric Studies: Use the Sensitivity Analysis Tool to run automated parametric studies on your process model; The Flowsheet Optimizer tool can bring the simulation to an optimum state according to user-defined criteria; The Calculator tool can read flowsheet variables, perform math operations on them and write the results back to the flowsheet - Petroleum Characterization: Bulk C7+ and TBP Distillation Curve characterization tools enable creation of pseudocompounds to simulate petroleum processing facilities - Parallel multicore CPU calculation engine: a fast and reliable flowsheet solver that takes advantage of the multicore CPUs on modern mobile devices - Save/Load XML simulation files on the device or in the cloud - Export simulation results to PDF and Text documents * Some items are available through in-app purchases ABOUT CHEMICAL PROCESS SIMULATION Chemical Process Simulation is a model-based representation of chemical, physical, biological, and other technical processes and unit operations in software. Basic prerequisites are a thorough knowledge of chemical and physical properties of pure components and mixtures, of reactions, and of mathematical models which, in combination, allow the calculation of a process in a computing device. Process simulation software describes processes in flow diagrams where unit operations are positioned and connected by product or educt streams. The software has to solve the mass and energy balance to find a stable operating point. The goal of a process simulation is to find optimal conditions for a process.
Lumeli
This app helps you reduce mindless scrolling and stay focused on important tasks. It allows you to block distracting apps, track your progress, and earn rewards for building healthier screen-time habits. Turn saved time into visible achievements and make your time count.
- Block distracting apps
- Set daily screen-time limits
- Track time saved
- Build daily streaks
- Earn Time Coins
- Unlock badges and achievements
- Sync progress via iCloud
Read full descriptionHide full description
Take back your time with Lumeli. Lumeli helps you reduce mindless scrolling, stay away from distracting apps, and turn the time you save into visible progress. Choose the apps that distract you, spin the wheel to set your protected time, and let Lumeli help you focus on what matters. SPIN. LOCK. TAKE LIFE BACK. But Lumeli isn't just about blocking apps. It's designed to make spending less time on your phone feel rewarding. Every focused session adds to your journey. Watch your protected time grow, build daily streaks, earn Time Coins, reach new milestones, and unlock badges and achievements as you make progress. Your Lumeli companion is there along the way with motivation and encouragement, helping turn small wins into a habit you can actually see. With Lumeli, you can: • Lock distracting apps for a chosen amount of time • Set daily limits to build healthier screen-time habits • See how much time you've taken back • Build and maintain daily streaks • Earn Time Coins for your progress • Unlock badges, achievements, and milestones • Follow your overall progress and completed sessions • Get motivation and encouragement from your Lumeli companion • Turn less screen time into a rewarding daily challenge Whether you're studying, working, spending time with people you care about, or simply trying to scroll less, Lumeli helps you put your phone down and make your time count. Less scrolling. More progress. More time for life. Your eligible Lumeli progress can sync privately through iCloud across supported devices using the same Apple account. Lumeli uses Apple's Screen Time technologies to provide app restriction features. Screen Time authorization is required for these features. Terms of Use / EULA: https://payam-git.github.io/lumeli-privacy/terms Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://payam-git.github.io/lumeli-privacy/privacy
Screenshots
Verdict
The clearest difference is rating: DWSIM Simulator at 4.7 against Lumeli's 1.0. DWSIM Simulator also leads on monetization model (free vs freemium) and ratings volume (107 vs 1). Lumeli's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads and in-app purchases 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. DWSIM Simulator sells 10 one-off in-app purchases and Lumeli sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
DWSIM Simulator holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: DWSIM Simulator has 107 ratings behind it against 1, so its average is the more settled of the two.
DWSIM Simulator ships an update every 6 weeks, Lumeli every 3 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | DWSIM Simulator | Lumeli |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (107 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 107 — better | 1 |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 106 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Medeiros | Payam Ghaffarvand Mokari |
Customer experience
DWSIM Simulator
Lumeli
In-app purchases
DWSIM Simulator
- User-Defined Unit Set$1.99
- Flowsheet Utilities Pack$2.99
- Unit Operations Pack 1$2.99
Show 7 moreShow fewer
- Unit Operations Pack 2$2.99
- Unit Operations Pack 3$2.99
- Activity Coeff. Model Pack$3.99
- Equation of State Model Pack$3.99
- Reactor Models Pack$4.99
- Unlock All Features$9.99
- Unlock All Features$39.99
Lumeli
- Lumeli Pro Monthly$3.991 Month
- Lumeli Pro Annual7 Days trial$19.991 Year
- Lumeli Pro Lifetime$29.99









