# Silverson Conversion Tools vs Pipe Offset Calc

The clearest difference is in-app purchases: Silverson Conversion Tools at none against Pipe Offset Calc's 1. Silverson Conversion Tools also leads on iOS requirement (8.0 vs 15.1). Pipe Offset Calc's advantage is update cadence (every 5 days vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Pipe Offset Calc sells 1 one-off in-app purchase. Silverson Conversion Tools asks for nothing beyond the download.

Silverson Conversion Tools ships an update every 6 months, Pipe Offset Calc every 5 days. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Silverson Conversion Tools | Pipe Offset Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/silverson-conversion-tools/id626189811/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 9 MB | 22 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Silverson Machines Limited](https://appshunter.io/developer/626189814) | [Aliaksei Shuliakouski](https://appshunter.io/developer/6795032775) |

## What reviewers say

### Silverson Conversion Tools

[App page](https://appshunter.io/ios/app/silverson-conversion-tools/id626189811)

This app provides engineers and operations personnel with tools to calculate the volume of vertical tanks of various shapes and top/bottom styles. It also includes multiple conversion tools for common measurements and a browser for product information.

**Highlights:** Vertical tank volume calculation, Multiple tank shapes and top/bottom styles, Unit conversion tools, Email/Share calculation results, Integrated product browser

**Features:** macOS Compatibility

**In-app purchases:** none


### Pipe Offset Calc

[App page](https://appshunter.io/ios/app/pipe-offset-calc-spoolset/id6805885264)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock everything | $12.99 | one-time |


## Frequently asked questions

### Is Silverson Conversion Tools free?

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

### Is Pipe Offset Calc free?

Pipe Offset Calc is free to download, with in-app purchases available.

### Do Silverson Conversion Tools or Pipe Offset Calc have ads?

Neither Silverson Conversion Tools nor Pipe Offset Calc shows ads.

### Which is updated more often, Silverson Conversion Tools or Pipe Offset Calc?

Silverson Conversion Tools ships an update every 6 months, and Pipe Offset Calc every 5 days. Most recently, Silverson Conversion Tools was updated on November 13, 2026 and Pipe Offset Calc on November 10, 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.*