# Viscosity Conversion vs Construction Calculator

The clearest difference is price: Construction Calculator at Free against Viscosity Conversion's $2.99. Construction Calculator also leads on update cadence (every 3 months vs every 30 months). Viscosity Conversion's advantage is iOS requirement (13 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Construction Calculator is free to download; Viscosity Conversion costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Viscosity Conversion ships an update every 30 months, Construction Calculator every 3 months. The most recent releases landed on October 9, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Viscosity Conversion | Construction Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 3 months** |
| Size | 1 MB | 70 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## What reviewers say

### Viscosity Conversion

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

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

**In-app purchases:** none


### Construction Calculator

[App page](https://appshunter.io/ios/app/construction-calculator-civil/id6450211084)

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

**In-app purchases:** none


## Frequently asked questions

### Is Viscosity Conversion free?

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

### Is Construction Calculator free?

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

### Do Viscosity Conversion or Construction Calculator have ads?

Neither Viscosity Conversion nor Construction Calculator shows ads.

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

Viscosity Conversion ships an update every 30 months, and Construction Calculator every 3 months. Most recently, Viscosity Conversion was updated on October 9, 2026 and Construction Calculator on October 22, 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.*