# Fluid Mechanics Calc vs VALK Tools

The clearest difference is update cadence: VALK Tools at every 2 weeks against Fluid Mechanics Calc's every 22 months. VALK Tools also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fluid Mechanics Calc ships an update every 22 months, VALK Tools every 2 weeks. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fluid Mechanics Calc | VALK Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 108 MB | 85 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [ITRoots](https://appshunter.io/developer/1086447931) |

## 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


### VALK Tools

[App page](https://appshunter.io/ios/app/valk-tools/id6754689250)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fluid Mechanics Calc free?

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

### Is VALK Tools free?

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

### Do Fluid Mechanics Calc or VALK Tools have ads?

Neither Fluid Mechanics Calc nor VALK Tools shows ads.

### Which is updated more often, Fluid Mechanics Calc or VALK Tools?

Fluid Mechanics Calc ships an update every 22 months, and VALK Tools every 2 weeks. Most recently, Fluid Mechanics Calc was updated on November 2, 2026 and VALK Tools on October 30, 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.*