Thermodynamic Cycles vs PhysicsCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thermodynamic Cycles
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Thermo Cycles is a powerful thermodynamic cycle calculator designed for engineering students and professionals. Solve 12 thermodynamic cycles quickly and accurately — just enter the values you know, and the iterative constraint solver computes the rest. Supported cycles: - Carnot Cycle - Otto Cycle - Diesel Cycle - Brayton Cycle - Regenerative Brayton Cycle - Rankine Cycle - Reheated Rankine Cycle - Open Feedwater Heater Cycle - Closed Feedwater Heater Cycle - Flash Chamber Cycle - Heat Pump / Refrigeration Cycle - Cascading Refrigeration Cycle Features: - Built-in fluid property tables for steam, R-134a, and more - Iterative constraint solver — enter what you know, get the full solution - State point properties automatically resolved from fluid tables - Clean, intuitive interface optimized for studying and problem sets - Available in 21 languages Get started free with the Carnot, Otto, and Rankine cycles included. Unlock additional cycle packs via in-app purchase. Whether you are studying for exams or solving homework problems, Thermo Cycles makes thermodynamic analysis fast and straightforward.
PhysicsCalc
This app provides a comprehensive collection of physics formulas, calculations, and solutions. It offers a unit converter, physical constants, and history of calculations, with advanced features like dependency graphs and error calculation available via a one-time purchase.
- 126 physics formulas
- Smart calculation with instant results
- Step-by-step solutions
- Unit converter
- Physical constants
- Dependency graphs
- Error calculator
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PhysicsCalculator is your pocket physics assistant. 126 formulas across 6 sections: mechanics, thermodynamics, electromagnetism, optics, oscillations & waves, and modern physics. FREE: • 56+ formulas — 2 from each subsection • Smart calculation — select the unknown variable, enter the rest, get instant results • Step-by-step solutions — detailed breakdown of every calculation • Unit converter — 13 categories, 80+ units of measurement • Physical constants — speed of light, Planck's constant, and more • History — all your calculations at your fingertips • 6 languages — English, Russian, German, Spanish, French, Chinese • Dark mode — comfortable work in any environment PREMIUM — ONE-TIME PURCHASE: • All 126 formulas — from high school to university level • Dependency graphs — visualize how one quantity depends on another • Error calculator — error propagation using partial derivatives • Favorites — save important calculations • PDF export — share your results PHYSICS SECTIONS: ▸ Mechanics — kinematics, dynamics, conservation laws, statics ▸ Thermodynamics — gas laws, heat transfer, molecular physics ▸ Electromagnetism — Coulomb's law, Ohm's law, electromagnetic induction ▸ Optics — refraction, lenses, diffraction ▸ Oscillations & Waves — pendulum, wave equation, sound ▸ Modern Physics — photoelectric effect, atomic physics, nuclear reactions The app is fully offline — no internet required, no data collected. Perfect for students, teachers, and physics enthusiasts.
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Verdict
The clearest difference is device support: Thermodynamic Cycles at 4 against PhysicsCalc's 2. 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. Thermodynamic Cycles sells 4 one-off in-app purchases and PhysicsCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 17, 2026 and July 31, 2026 respectively.
| Parameter | Thermodynamic Cycles | PhysicsCalc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 50 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Angus Malcolm | Rustam Elmuradov |
In-app purchases
Thermodynamic Cycles
- Gas Power Cycles$0.49
- Refrigeration Cycles$0.49
- Vapor Power Cycles$0.49
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- Unlock All$0.99
PhysicsCalc
- All Formulas$1.99





