Thermodynamics Calculator vs Compleanni + Onomastici
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thermodynamics Calculator
This app offers 44 essential thermodynamics calculators and thermal engineering tables. It provides quick access to formulas, definitions, and data, making it a valuable tool for engineers and students.
- 44 thermodynamics calculators
- Thermal engineering tables
- Formulas, tables, and definitions
- Compatible with iPhone and iPad
- Quick and easy reference
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Thermodynamics Calculator puts 44 thermodynamics and heat-transfer calculators — plus a library of thermal engineering reference tables — in one fast, offline app for engineers and students. Sizing a heat exchanger, checking a Carnot efficiency, or looking up the emissivity of a material? You get the formula, the result, and the reference data in seconds. WHY ENGINEERS USE IT • Solve for any variable — on most calculators, rearrange the formula and solve for whichever value you're missing, not just the "standard" output. • SI and USCS (Imperial) units — switch the whole app between metric and imperial with one tap; every input, result, and unit label updates instantly. • Reference tables built in — emissivity coefficients, thermal conductivity of common liquids and heat-exchanger materials, radiation constants, and more. • Find it fast — search plus category filters: Heat Transfer, Thermal Expansion, Radiation, Energy & Work, Dimensionless Numbers, Properties & Tables. WHO IT'S FOR Mechanical, chemical, and HVAC engineers, and thermodynamics / heat-transfer students who want quick, reliable answers without digging through a textbook. ALL 44 CALCULATORS List of Calculators: 1. Carnot Efficiency (Carnot Cycle) 2. Eckert Number 3. Emissivity Coefficient 4. Energy Efficiency 5. Energy/Work Converter 6. Enthalpy 7. Entropy 8. Fick’s Law of Diffusion 9. Fouling Factor 10. Fourier Number 11. Heat Flow 12. Heat Storage 13. Heat Transfer Rate 14. Kinetic Energy 15. Laws of Thermodynamics 16. Lewis Number 17. Liquid Phase Diffusion Coefficient 18. Nusselt Number 19. Peclet Number 20. Potential Energy 21. Prandtl Number 22. Radiation Constant 23. Radiation Converter 24. Radiation Heat Transfer 25. Rankine Efficiency 26. Sherwood Number 27. Specific Heat Capacity Calculator 28. Specific Heat Capacity Converter 29. Stefan-Boltzmann Law 30. Surface Absorptivity 31. Temperature Converter 32. Thermal Area Expansion 33. Thermal Conductivity (Common Liquids) 34. Thermal Conductivity (Heat Exchanger Materials) 35. Thermal Conductivity Calculator 36. Thermal Conductivity Converter 37. Thermal Diffusivity 38. Thermal Expansion Converter 39. Thermal Linear & Volumetric Expansion Relationship 40. Thermal Linear Expansion 41. Thermal Resistivity 42. Thermal Transmittance 43. Thermal Volumetric Expansion 44. Work Ideal for mechanical engineers and students!
Compleanni + Onomastici
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Onomastici e Compleanni è l’app pensata per ricordare facilmente onomastici, compleanni e ricorrenze personali. Ogni giorno puoi consultare i santi del calendario, vedere quali contatti festeggiano l’onomastico o il compleanno e inviare un messaggio di auguri in pochi tocchi. Funzioni principali: - Santi e onomastici del giorno - Calendario delle ricorrenze - Ricerca dei santi - Compleanni dai contatti - Onomastici personalizzati - Messaggi di auguri pronti - Notifiche giornaliere - Widget per la schermata Home - Backup degli onomastici personalizzati - Tema chiaro e scuro Ideale per chi vuole ricordare le date importanti con semplicità, senza perdere un’occasione per fare gli auguri. Per qualsiasi consiglio o segnalazione usa il modulo di contatto dalle impostazioni dell'app, o scrivi a android@araneum.it
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Verdict
The clearest difference is price: Compleanni + Onomastici at Free against Thermodynamics Calculator's $1.99. Compleanni + Onomastici also leads on update cadence (daily vs every 7 months) and iOS requirement (13.0 vs 16.1). Thermodynamics Calculator'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
Compleanni + Onomastici is free to download; Thermodynamics Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Thermodynamics Calculator ships an update every 7 months, Compleanni + Onomastici daily. The most recent releases landed on September 18, 2026 and July 27, 2026 respectively.
| Parameter | Thermodynamics Calculator | Compleanni + Onomastici |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.0 (30 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 30 — better | — |
| Update frequency | Every 7 months | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 34 MB |
| Age rating | +4 | 4+ |
| Developer | V PUGAZHENTHI | Araneum Group srl |
In-app purchases
Thermodynamics Calculator
No in-app purchases
Compleanni + Onomastici
No in-app purchases





