# Thermal Engineering Calc vs BOHN

The clearest difference is price: BOHN at Free against Thermal Engineering Calc's $2.99. BOHN also leads on update cadence (every 3 months vs every 15 months) and rating (5.0 vs 4.7). Thermal Engineering Calc's advantage is ratings volume (6 vs 1). On ads, in-app purchases and device support there is nothing between them.

BOHN is free to download; Thermal Engineering Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BOHN holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Thermal Engineering Calc has 6 ratings behind it against 1, so its average is the more settled of the two.

Thermal Engineering Calc ships an update every 15 months, BOHN every 3 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Thermal Engineering Calc | BOHN |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.7 (6 ratings)](https://appshunter.io/ios/app/thermal-engineering-calc/id684142208/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bohn/id735544893/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 15 MB |
| Requires iOS | 16.1 | **12.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [armando monroy](https://appshunter.io/developer/735544896) |

## What reviewers say

### Thermal Engineering Calc

[App page](https://appshunter.io/ios/app/thermal-engineering-calc/id684142208)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### BOHN

[App page](https://appshunter.io/ios/app/bohn/id735544893)

This app provides a comprehensive catalog of refrigeration products, featuring technical specifications, pricing, and catalogs. Users can perform quick equipment calculations for specific applications and share them. Direct contact with the company is available through email or the app's web page.

**Highlights:** Product catalog access, Technical specifications, Pricing information, Equipment calculation tool, Direct contact options, Improved search functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thermal Engineering Calc free?

Thermal Engineering Calc costs $2.99, with no in-app purchases.

### Is BOHN free?

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

### Which has better reviews, Thermal Engineering Calc or BOHN?

BOHN is rated higher. Thermal Engineering Calc averages 4.7 out of 5 from 6 ratings, while BOHN averages 5.0 from 1 ratings.

### Do Thermal Engineering Calc or BOHN have ads?

Neither Thermal Engineering Calc nor BOHN shows ads.

### Which is updated more often, Thermal Engineering Calc or BOHN?

Thermal Engineering Calc ships an update every 15 months, and BOHN every 3 months. Most recently, Thermal Engineering Calc was updated on October 6, 2026 and BOHN on October 7, 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.*