# Third grade Math vs Thermodynamics Calculators

The clearest difference is price: Thermodynamics Calculators at Free against Third grade Math's $2.99. Thermodynamics Calculators also leads on update cadence (weekly vs every 28 months). Third grade Math's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On ads there is nothing between them.

Thermodynamics Calculators is free to download; Third grade Math costs $2.99 up front. Thermodynamics Calculators sells 3 one-off in-app purchases. Third grade Math asks for nothing beyond the download.

Third grade Math ships an update every 28 months, Thermodynamics Calculators weekly. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Third grade Math | Thermodynamics Calculators |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Weekly** |
| Monetization | — | Free |
| Size | 17 MB | 6 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Lucy Enterprises](https://appshunter.io/developer/1656612108) |

## What reviewers say

### Third grade Math

[App page](https://appshunter.io/ios/app/third-grade-math-subtraction/id1271515324)

**Features:** macOS Compatibility

**In-app purchases:** none


### Thermodynamics Calculators

[App page](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450)

This app provides engineering professionals with a powerful tool for thermodynamics calculations. It features a comprehensive dataset for various species and a range of building blocks to construct complex models. An illustrative sample model is included for guidance.

**Highlights:** Temperature-dependent property data for 8 species, Building blocks for model creation, Daisy-chaining blocks for complex models, Includes one sample model, Validated against commercial software

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Edit option | $0.99 | one-time |
| Remove ads | $1.99 | one-time |
| Modeling access | $4.99 | one-time |


## Frequently asked questions

### Is Third grade Math free?

Third grade Math costs $2.99, with no in-app purchases.

### Is Thermodynamics Calculators free?

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

### Do Third grade Math or Thermodynamics Calculators have ads?

Neither Third grade Math nor Thermodynamics Calculators shows ads.

### Which is updated more often, Third grade Math or Thermodynamics Calculators?

Third grade Math ships an update every 28 months, and Thermodynamics Calculators weekly. Most recently, Third grade Math was updated on October 10, 2026 and Thermodynamics Calculators on September 29, 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.*