# MultiProtector vs Pipe Diameter Calculators

The clearest difference is in-app purchases: MultiProtector at none against Pipe Diameter Calculators's 1. MultiProtector also leads on update cadence (every 6 months vs every 20 months) and iOS requirement (12.2 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Pipe Diameter Calculators sells 1 one-off in-app purchase. MultiProtector asks for nothing beyond the download.

MultiProtector ships an update every 6 months, Pipe Diameter Calculators every 20 months. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | MultiProtector | Pipe Diameter Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 20 months |
| Size | 151 MB | 59 MB |
| Requires iOS | **12.2** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NETZSCH Pumpen & Systeme GmbH](https://appshunter.io/developer/1568447514) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### MultiProtector

[App page](https://appshunter.io/ios/app/multiprotector/id1568447512)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pipe Diameter Calculators

[App page](https://appshunter.io/ios/app/pipe-diameter-calculators/id6743020859)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is MultiProtector free?

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

### Is Pipe Diameter Calculators free?

Pipe Diameter Calculators is free to download, with in-app purchases available.

### Do MultiProtector or Pipe Diameter Calculators have ads?

Neither MultiProtector nor Pipe Diameter Calculators shows ads.

### Which is updated more often, MultiProtector or Pipe Diameter Calculators?

MultiProtector ships an update every 6 months, and Pipe Diameter Calculators every 20 months. Most recently, MultiProtector was updated on November 7, 2026 and Pipe Diameter Calculators on November 8, 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.*