# KRAH Pipe Calculation vs Volume Calculator Pro

The clearest difference is in-app purchases: KRAH Pipe Calculation at none against Volume Calculator Pro's 3. KRAH Pipe Calculation also leads on update cadence (every 2 months vs every 31 months) and iOS requirement (12.0 vs 14.2). On price, ads and device support there is nothing between them.

Both are free to download. Volume Calculator Pro sells 3 in-app purchases, starting at $0.99 per 7 days. KRAH Pipe Calculation asks for nothing beyond the download.

KRAH Pipe Calculation ships an update every 2 months, Volume Calculator Pro every 31 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KRAH Pipe Calculation | Volume Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/volume-calculator-pro/id1566518769/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 31 months |
| Monetization | — | Free |
| Size | 74 MB | 2 MB |
| Requires iOS | **12.0** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Krah GmbH](https://appshunter.io/developer/1379033149) | [Anna Filobok](https://appshunter.io/developer/1613515832) |

## What reviewers say

### KRAH Pipe Calculation

[App page](https://appshunter.io/ios/app/krah-pipe-calculation/id1379033150)

**Features:** macOS Compatibility

**In-app purchases:** none


### Volume Calculator Pro

[App page](https://appshunter.io/ios/app/volume-calculator-pro/id1566518769)

This utility app quickly calculates and converts volumes between imperial and metric systems. Input dimensions like width, length, and depth to get instant results in various units. It supports multiple measurement systems for easy conversion.

**Highlights:** Real-time volume conversion, Imperial and metric unit support, Calculate volume from dimensions, Supports centimeters, meters, inches, feet, and yards, Outputs cubic centimeters, meters, inches, feet, and yards

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | per 7 days |
| Premium Access | $1.99 | per month |
| Premium Access | $5.99 | per year |


## Frequently asked questions

### Is KRAH Pipe Calculation free?

KRAH Pipe Calculation is free to download, with no in-app purchases.

### Is Volume Calculator Pro free?

Volume Calculator Pro is free to download, with in-app purchases available.

### Do KRAH Pipe Calculation or Volume Calculator Pro have ads?

Neither KRAH Pipe Calculation nor Volume Calculator Pro shows ads.

### Which is updated more often, KRAH Pipe Calculation or Volume Calculator Pro?

KRAH Pipe Calculation ships an update every 2 months, and Volume Calculator Pro every 31 months. Most recently, KRAH Pipe Calculation was updated on November 2, 2026 and Volume Calculator Pro on November 3, 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.*