Comparison

Cortona3D Viewer vs Thermal Engineering Calc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Cortona3D Viewer

View interactive 3D and 2D product catalogs, work instructions, and maintenance guides. Immerse yourself in 3D procedures and VRML scenes with augmented reality on your iPhone and iPad. Supports legacy 2D and interactive 3D content derived from CAD.

Highlights
  • Augmented reality support
  • Interactive 3D and 2D content
  • Multi-touch gestures for navigation
  • Exploded views and bill of materials
  • Part search and hide/show
  • Step-by-step instructions
  • Content upload and sharing
Features
Read full description

Cortona3D Viewer is your tool for interactive 3D and 2D product catalogs, work instructions, maintenance guides, and manuals created using Cortona3D RapidAuthor. With this tool, you can immerse yourself in 3D procedures and VRML scenes through augmented reality on your iPhone. Many equipment manufacturers are now enhancing their technical documentation. The Cortona3D Viewer supports AR, 3D interaction, full-text search, and interactive 2D elements, making it compatible with both legacy 2D and interactive 3D content derived from CAD. Interactive 3D streamlines complex maintenance and assembly communication, aids part identification, and facilitates mechanical skill training. It can also serve as a sales tool for product feature demos. Cortona3D Viewer on iOS complements RapidAuthor tools. RapidAuthor generates comprehensive technical documents with text, 2D, and 3D graphics from CAD and bill of materials data. Even if your company doesn't use Cortona3D RapidAuthor, you can still install Cortona3D Viewer to access sample content featuring 3D, legacy 2D graphics, and AR elements. Features: — AR support for procedures and VRML scenes — Multi-touch gestures for navigation — Exploded views and full bill of materials hierarchy — Part-specific additional information on touch — Various selection modes for parts — Part search, hide/show — Order parts using the shopping cart — Detailed Parts List with Part Number, Nomenclature, etc. — Links from IPC and procedures to other documents — Comprehensive viewing of 2D images in SGM and SVG formats — Inspect sheet transition animations in parts catalogs — Playback or scrub through animated install/remove sequences — Step-by-step instructions as text overlay — Dynamic cross-section and distance measuring — Navigation cube — Universal app for iPhone and iPad — Content upload and sharing via iCloud — Examples of ESA astronaut training content.

About

Thermal Engineering Calc

This app provides 44 calculators for thermal engineering parameters, along with thermodynamics tables, formulas, and definitions. It's a comprehensive tool for mechanical engineers and students needing to perform various thermal calculations.

Highlights
  • 44 thermal engineering calculators
  • Thermodynamics tables
  • Formulas and definitions
  • Carnot and Rankine efficiency calculators
  • Heat transfer calculations
  • Temperature conversion
Features
Read full description

Thermal Engineering Calc. has 44 Calculators related to THERMAL ENGINEERING PARAMETERS along with Thermodynamics Tables - Formulas and Definitions too List of Calculators are : 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 Absorbtivities -Tables 31.Temperature Converter 32.Thermal Area Expansion 33.Thermal Conductivity (Common Liquids) -Tables 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 Useful for Mechanical Engineers and Students.

Screenshots

Cortona3D Viewer4 screens
Thermal Engineering Calc4 screens

Verdict

The call

The clearest difference is rating: Thermal Engineering Calc at 4.7 against Cortona3D Viewer's 3.0. Thermal Engineering Calc also leads on review sentiment (50% vs 40%). Cortona3D Viewer's advantage is update cadence (every 7 months vs every 15 months). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Cortona3D Viewer costs $2.99 and Thermal Engineering Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Thermal Engineering Calc holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews point the same way: 40% of Cortona3D Viewer's written reviews are positive against 50% of Thermal Engineering Calc's.

UpkeepUpdate frequency

Cortona3D Viewer ships an update every 7 months, Thermal Engineering Calc every 15 months. Both last shipped on October 23, 2026.

Scorecard3 real differences · 7 level
Cortona3D Viewer versus Thermal Engineering Calc: the parameters behind the verdict, then further details
ParameterCortona3D ViewerThermal Engineering Calc
Price$2.99$2.99
Rating3.0 (4 ratings)4.7 (6 ratings) — better
Positive reviews40.0% of reviews50.0% of reviews — better
Number of ratings46 — better
Update frequencyEvery 7 months — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.1
Further details — not scored
Size96 MB3 MB
Age rating4+4+
DeveloperParallelGraphicsV PUGAZHENTHI

Customer experience

Cortona3D Viewer

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

Thermal Engineering Calc

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Cortona3D Viewer

No in-app purchases

None

Thermal Engineering Calc

No in-app purchases

Questions

Is Cortona3D Viewer free?
Cortona3D Viewer costs $2.99, with no in-app purchases.
Is Thermal Engineering Calc free?
Thermal Engineering Calc costs $2.99, with no in-app purchases.
Which has better reviews, Cortona3D Viewer or Thermal Engineering Calc?
Thermal Engineering Calc is rated higher. Cortona3D Viewer averages 3.0 out of 5 from 4 ratings, while Thermal Engineering Calc averages 4.7 from 6 ratings.
Do Cortona3D Viewer or Thermal Engineering Calc have ads?
Neither Cortona3D Viewer nor Thermal Engineering Calc shows ads.
Which is updated more often, Cortona3D Viewer or Thermal Engineering Calc?
Cortona3D Viewer ships an update every 7 months, and Thermal Engineering Calc every 15 months. Most recently, Cortona3D Viewer was updated on October 23, 2026 and Thermal Engineering Calc on October 23, 2026.

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