# Fluid Mechanics Calc vs Mechanical Engineering Toolkit

The clearest difference is in-app purchases: Fluid Mechanics Calc at none against Mechanical Engineering Toolkit's 1. Fluid Mechanics Calc also leads on ads (none vs shown) and rating (5.0 vs 4.8). Mechanical Engineering Toolkit's advantage is update cadence (every 8 days vs every 22 months) and ratings volume (64 vs 3). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Mechanical Engineering Toolkit sells 1 one-off in-app purchase. Fluid Mechanics Calc asks for nothing beyond the download.

Fluid Mechanics Calc holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Mechanical Engineering Toolkit has 64 ratings behind it against 3, so its average is the more settled of the two.

Fluid Mechanics Calc ships an update every 22 months, Mechanical Engineering Toolkit every 8 days. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Fluid Mechanics Calc | Mechanical Engineering Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538/reviews)** | [4.8 (64 ratings)](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443/reviews) |
| Number of ratings | 3 | **64** |
| Positive reviews | — | 57.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 22 months | **Every 8 days** |
| Monetization | **Free** | Ad-supported |
| Size | 108 MB | 38 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [APPS BAY LIMITED](https://appshunter.io/developer/1599035519) |

## What reviewers say

### Fluid Mechanics Calc

[App page](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538)

This utility app provides a comprehensive calculator for fluid mechanics, civil, and structural engineering parameters. It offers over 130 formulas and 360 calculation methods, supporting seamless unit system switching for analysis, design, and operation of fluid-related systems.

**Highlights:** 130+ fluid mechanics formulas, 360+ calculation methods, Unit system conversion (metric/US), Favorite formula marking, High mathematical precision, Seamless unit switching

**Features:** macOS Compatibility

**In-app purchases:** none


### Mechanical Engineering Toolkit

[App page](https://appshunter.io/ios/app/mechanical-engineering-toolkit/id1601099443)

This utility app provides a comprehensive collection of engineering equations and formulas for students and professionals. Easily perform calculations by selecting a formula and inputting variables, with detailed instructions and reference material included.

**Highlights:** Engineering equations and formulas, Mechanics of Material calculations, Theory of Elasticity formulas, Composite Material properties, Reference material, Variable input for calculations

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Fluid Mechanics Calc free?

Fluid Mechanics Calc is free to download, with no in-app purchases.

### Is Mechanical Engineering Toolkit free?

Mechanical Engineering Toolkit is free to download, with in-app purchases available.

### Which has better reviews, Fluid Mechanics Calc or Mechanical Engineering Toolkit?

Fluid Mechanics Calc is rated higher. Fluid Mechanics Calc averages 5.0 out of 5 from 3 ratings, while Mechanical Engineering Toolkit averages 4.8 from 64 ratings.

### Do Fluid Mechanics Calc or Mechanical Engineering Toolkit have ads?

Mechanical Engineering Toolkit shows ads; Fluid Mechanics Calc does not.

### Which is updated more often, Fluid Mechanics Calc or Mechanical Engineering Toolkit?

Fluid Mechanics Calc ships an update every 22 months, and Mechanical Engineering Toolkit every 8 days. Most recently, Fluid Mechanics Calc was updated on September 19, 2026 and Mechanical Engineering Toolkit on September 24, 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.*