# Fluid Mechanics Calculator vs Viscosity Conversion

The clearest difference is update cadence: Fluid Mechanics Calculator at every 7 months against Viscosity Conversion's every 30 months. Viscosity Conversion's advantage is iOS requirement (13 vs 16.1). On price, ads, in-app purchases and device support there is nothing between them.

Fluid Mechanics Calculator costs $2.99 and Viscosity Conversion $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fluid Mechanics Calculator ships an update every 7 months, Viscosity Conversion every 30 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Fluid Mechanics Calculator | Viscosity Conversion |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.5 (21 ratings)](https://appshunter.io/ios/app/fluid-mechanics-calculator/id526974981/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 30 months |
| Monetization | Paid | — |
| Size | 11 MB | 1 MB |
| Requires iOS | 16.1 | **13** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Fluid Mechanics Calculator

[App page](https://appshunter.io/ios/app/fluid-mechanics-calculator/id526974981)

This app provides 97 calculators for fluid mechanics and civil engineering parameters. It supports both Imperial (USCS) and Metric (SI) units, offering automatic and accurate calculations with unit changes.

**Highlights:** 97 fluid mechanics and civil engineering calculators, Supports SI and USCS (Imperial) units, Automatic calculations with unit changes, Wide range of parameters covered, Civil engineering applications

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

**In-app purchases:** none


### Viscosity Conversion

[App page](https://appshunter.io/ios/app/viscosity-conversion/id630288155)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fluid Mechanics Calculator free?

Fluid Mechanics Calculator costs $2.99, with no in-app purchases.

### Is Viscosity Conversion free?

Viscosity Conversion costs $2.99, with no in-app purchases.

### Do Fluid Mechanics Calculator or Viscosity Conversion have ads?

Neither Fluid Mechanics Calculator nor Viscosity Conversion shows ads.

### Which is updated more often, Fluid Mechanics Calculator or Viscosity Conversion?

Fluid Mechanics Calculator ships an update every 7 months, and Viscosity Conversion every 30 months. Most recently, Fluid Mechanics Calculator was updated on October 24, 2026 and Viscosity Conversion on October 29, 2026.

---

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