Probability Distribution vs Thermonator Thermodynamics
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Probability Distribution
This app allows users to calculate probabilities and visualize various continuous and discrete probability distributions. It supports a wide range of common distributions and plans to add more in the future.
- Calculate probabilities
- Visualize distributions
- Normal (Gaussian) distribution
- Binomial distribution
- Poisson distribution
- Exponential distribution
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Calculate probabilities and visualize probability distributions. Supported continuous probability distributions: - Normal (Gaussian) - t (Student's t) - Chi-Squared - F - Exponential - Gamma - Beta - Log-normal Supported discrete probability distributions: - Binomial - Poisson - Pascal - Geometric - Hypergeometric and more are coming.
Thermonator Thermodynamics
This app serves as a comprehensive thermodynamic calculator, assisting with problems from engineering textbooks. It quickly computes steam tables for various substances and offers educational aids like step-by-step calculations and concept reminders.
- Thermodynamic calculations
- Steam table computation
- Step-by-step solutions
- Interactive graphs
- Unit conversion
- Results sharing
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- Thermodynamic calculator to solve problems and exercises from Thermodynamic Engineering books. - Quickly calculates steam tables for water, air, ideal gases, refrigerants and other substances. - Contains help and explanations of the main theoretical concepts, equations, first and second thermodynamic laws, etc. FUNCTIONALITIES No advertising. Interactive graph. Share results. Educational aids - Step-by-step calculations. - Solved exercises. - Quick reminders on thermodynamic concepts and formulas. Settings - Control system: Control mass, Control volume. - Sign convention: ΔU = Q − W, ΔU = Q + W. - Reference state: Normal boiling point, ASHRAE, IIR, Çengel-Boles, Moran-Shapiro, Reynolds, Sonntag-Van Wylen-Borgnakke. - Dead state: EPA, ISO, IUPAC, NIST. - Units: International System of Units, Imperial System of Units, Traditional US units. Calculations - Properties: State, Saturation, Process, Cycle. - Calculation of states, processes, and cycles. - Warnings for sensitive calculations: Critical point, Saturation dome (PT), Liquid (v), Gas (Th). - Processes: Polytropic, Isobar, Isotherm, Isochore, Isenthalpic, Adiabatic. - Substances: Water, Noble gases, Ideal gases, Ideal gases (cp Variable), Custom gas. Calculation wizards - Units converter: Pressure, Temperature, Volume, Mass, Energy, Power. - Interpolation: One dimension, Two dimensions. - Mass: Calculate the properties that depend on the mass. - Saturation: Calculate the states of saturated liquid and saturated vapor. Results reports - Substances: Formula, Molecular mass, Critical point, Normal boiling point, Specific heat. - Summary: Settings, States, Processes, Cycles. - Calculations: Step-by-step calculations. - Balances: Mass balance. PREMIUM Calculations - Processes: Irreversible, Inlet+Exit, Branches, Reheating, Subcooling. - Substances: Real substances (Acetone, Air, Ammonia, Benzene, Butane, Carbon dioxide, Ethane, Ethanol, Ethylene, Heptane, Hexane, Isobutane, Isopentane, Methane, Nitrogen, Octane, Oxygen, Pentane, Propane, Propanol, Propylene, R-11, R-114, R-12, R-123, R-1234yf, R-124, R-13, R-134a, R-14, R-22, R-23, R-32, R-404a, R-407c, R-410a, R-500, R-502, R-507a, R-C318, SES36, Water). Calculation wizards - Energy balance: Solve exercises of Unknown process, Internal friction, Kinetic energy, Potential energy, etc. - Entropy balance: Solve exercises of Internal generated entropy, External generated entropy, Universe entropy increment, Destroyed exergy, etc. - Heat exchangers: Generic, Closed, Open, Mixed. - Cycles: Automatically solve 24 types of cycles. Basic cycles (1 Cycle), Combustion engines (4 Cycles), Gas turbine (5 Cycles), Steam turbine (2 Cycles), Steam turbine with regenerative preheating (4 Cycles), Vapor-compression refrigeration (6 Cycles), Gas refrigeration (2 Cycles). Results reports - Balances: Energy balance, Boundary work, Entropy balance, Internal generated entropy, External generated entropy, Universe entropy increment, Destroyed exergy (Irreversibility). Exercises - Open and save exercises. Terms of use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is rating: Thermonator Thermodynamics at 5.0 against Probability Distribution's 4.5. Thermonator Thermodynamics also leads on monetization model (freemium vs paid). Probability Distribution's advantage is ratings volume (17 vs 1). On price, update cadence, 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. Probability Distribution sells 1 one-off in-app purchase and Thermonator Thermodynamics sells 6 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Thermonator Thermodynamics holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Probability Distribution has 17 ratings behind it against 1, so its average is the more settled of the two.
Probability Distribution ships an update every 2 weeks, Thermonator Thermodynamics every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Probability Distribution | Thermonator Thermodynamics |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (17 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 17 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Madiyar Aitbayev | Tomas Gomez Martin |
Customer experience
Probability Distribution
Thermonator Thermodynamics
In-app purchases
Probability Distribution
- Unlock All Distributions$2.99
Thermonator Thermodynamics
- Premium - 1 week$2.997 Days
- Premium - 1 month$3.991 Month
- Premium - 6 months$4.996 Months
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- Premium - 1 month$5.991 Month
- Premium Student - 6 months$8.996 Months
- Premium Pro - 6 months$9.996 Months
Questions
Is Probability Distribution free?
Is Thermonator Thermodynamics free?
Which has better reviews, Probability Distribution or Thermonator Thermodynamics?
Do Probability Distribution or Thermonator Thermodynamics have ads?
Which is updated more often, Probability Distribution or Thermonator Thermodynamics?
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