FluidProps vs D
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
FluidProps
Read full descriptionHide full description
FluidProps is an app to calculate and display thermophysical data for chemical substances (fluids). It includes: - An interactive 3D molecule visualization tool - Compound database with extensive data for more than 1100 compounds (from ChemSep, CoolProp and ChEDL Thermo databases) - Thermophysical state (phase) properties: 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, Heat of Vaporization, Ideal gas Enthalpy, Ideal gas Enthalpy of Formation at 25 C, Ideal Gas Gibbs Free Energy of Formation at 25 C, Molecular Weight - Rigorous Thermodynamic Models: CoolProp, GERG-2008 EOS, Peng-Robinson EOS, Soave-Redlich-Kwong EOS, Raoult's Law and IAPWS-IF97 Steam Tables (for Water) - Export generated reports as Text or XLSX Spreadsheet files - Customizable system of units and number formatting - Offline calculations: this app works in offline mode. An internet connection is required for 3D molecule visualization only
D
Read full descriptionHide full description
Ā· Your digital assistant for ship management! It integrates features like BOSS dashboard, energy efficiency management, route optimization, Prognostics and Health Management, planned maintenance, smart warehousing, ship safety inspection, E-log, D-Knowledge, system management, crew management, and budget management. Ā· A wealth of pre-configured information, integrating essential technical documents for a one-stop service product that's ready to use right away. Ā· Utilizing technologies such as IoT, edge computing, AR, and AI to build a highly intelligent ship management platform. Ā· Shore-ship data synchronization, transparent processes, real-time management of ship dynamics, balancing efficiency and management. Ā· A free software solution for everyone, offering a management tool for mariners at no cost.
Screenshots
Verdict
The clearest difference is price: D at Free against FluidProps's $0.99. FluidProps's advantage is update cadence (every 3 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
D is free to download; FluidProps costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FluidProps ships an update every 3 days, D every 2 months. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.
| Parameter | FluidProps | D |
|---|---|---|
| Price | $0.99 | Free ā better |
| Update frequency | Every 3 days ā better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 ā better | 13.0 |
| Further details ā not scored | ||
| Size | 105 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Medeiros | Winkong Marine Engineering Co.,Ltd. |
In-app purchases
FluidProps
No in-app purchases
D
No in-app purchases









