# Silverson Conversion Tools vs Pump Power Calculator

The clearest difference is price: Silverson Conversion Tools at Free against Pump Power Calculator's $2.99. Silverson Conversion Tools also leads on in-app purchases (none vs 1) and iOS requirement (8.0 vs 13.0). On update cadence, ads and device support there is nothing between them.

Silverson Conversion Tools is free to download; Pump Power Calculator costs $2.99 up front. Pump Power Calculator 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, Pump Power Calculator every 7 months. The most recent releases landed on June 5, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Silverson Conversion Tools | Pump Power Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| 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 7 months |
| Monetization | Free | — |
| Size | 9 MB | 37 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Silverson Machines Limited](https://appshunter.io/developer/626189814) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## 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


### Pump Power Calculator

[App page](https://appshunter.io/ios/app/pump-power-calculator/id1671140802)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is Silverson Conversion Tools free?

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

### Is Pump Power Calculator free?

Pump Power Calculator costs $2.99, and also offers in-app purchases.

### Do Silverson Conversion Tools or Pump Power Calculator have ads?

Neither Silverson Conversion Tools nor Pump Power Calculator shows ads.

### Which is updated more often, Silverson Conversion Tools or Pump Power Calculator?

Silverson Conversion Tools ships an update every 6 months, and Pump Power Calculator every 7 months. Most recently, Silverson Conversion Tools was updated on June 5, 2026 and Pump Power Calculator on September 19, 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.*