# Engineering Cookbook vs Thermodynamics Calculator lite

The clearest difference is review sentiment: Engineering Cookbook at 73% against Thermodynamics Calculator lite's 0%. Engineering Cookbook also leads on in-app purchases (none vs 1) and ads (none vs shown). Thermodynamics Calculator lite's advantage is ratings volume (21 vs 6). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Thermodynamics Calculator lite sells 1 one-off in-app purchase. Engineering Cookbook asks for nothing beyond the download.

Engineering Cookbook holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 6 and 21 respectively. Written reviews point the same way: 73% of Engineering Cookbook's written reviews are positive against 0% of Thermodynamics Calculator lite's.

Engineering Cookbook ships an update every 34 months, Thermodynamics Calculator lite every 17 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Engineering Cookbook | Thermodynamics Calculator lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (6 ratings)](https://appshunter.io/ios/app/engineering-cookbook/id376850735/reviews)** | [4.2 (21 ratings)](https://appshunter.io/ios/app/thermodynamics-calculator-lite/id916682184/reviews) |
| Number of ratings | 6 | **21** |
| Positive reviews | **72.7% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 34 months | **Every 17 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 45 MB | 14 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Loren Cook Company](https://appshunter.io/developer/376850738) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Engineering Cookbook

[App page](https://appshunter.io/ios/app/engineering-cookbook/id376850735)

A handy reference guide for mechanical designers, offering quick access to essential information on fan basics, system and duct design, motors, heating, refrigeration, and conversion factors.

**Highlights:** Fan Basics, System Design, Duct Design, Motors & Drives, Heating & Refrigeration, Formulas & Conversion Factors

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Thermodynamics Calculator lite

[App page](https://appshunter.io/ios/app/thermodynamics-calculator-lite/id916682184)

This app provides 44 calculators for thermodynamics and thermal engineering, including formulas, tables, and constants. Additional calculators are available for purchase within the app. It's designed for mechanical engineers and students.

**Highlights:** 44 Thermodynamics calculators, Formulas, tables, and constants, Thermal engineering calculations, In-app purchase for more calculators, Useful for engineers and students

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 44 Thermodynamics Calculators | $2.99 | one-time |


## Frequently asked questions

### Is Engineering Cookbook free?

Engineering Cookbook is free to download, with no in-app purchases.

### Is Thermodynamics Calculator lite free?

Thermodynamics Calculator lite is free to download, with in-app purchases available.

### Which has better reviews, Engineering Cookbook or Thermodynamics Calculator lite?

Engineering Cookbook is rated higher. Engineering Cookbook averages 4.5 out of 5 from 6 ratings, while Thermodynamics Calculator lite averages 4.2 from 21 ratings.

### Do Engineering Cookbook or Thermodynamics Calculator lite have ads?

Thermodynamics Calculator lite shows ads; Engineering Cookbook does not.

### Which is updated more often, Engineering Cookbook or Thermodynamics Calculator lite?

Engineering Cookbook ships an update every 34 months, and Thermodynamics Calculator lite every 17 months. Most recently, Engineering Cookbook was updated on November 6, 2026 and Thermodynamics Calculator lite on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*