# Silverson Conversion Tools vs SPX FLOW eXpress

The clearest difference is rating: Silverson Conversion Tools at 4.7 against SPX FLOW eXpress's 4.0. Silverson Conversion Tools also leads on iOS requirement (8.0 vs 15.1). SPX FLOW eXpress's advantage is update cadence (every 2 months vs every 6 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Silverson Conversion Tools holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

Silverson Conversion Tools ships an update every 6 months, SPX FLOW eXpress every 2 months. The most recent releases landed on June 5, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Silverson Conversion Tools | SPX FLOW eXpress |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/silverson-conversion-tools/id626189811/reviews)** | [4.0 (8 ratings)](https://appshunter.io/ios/app/spx-flow-express/id1591451668/reviews) |
| Number of ratings | 3 | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 9 MB | 69 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Silverson Machines Limited](https://appshunter.io/developer/626189814) | [SPX Flow, Inc.](https://appshunter.io/developer/1166665729) |

## 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


### SPX FLOW eXpress

[App page](https://appshunter.io/ios/app/spx-flow-express/id1591451668)

Access essential product, service, and support information for leading brands. Scan serial numbers or QR codes to find specifications and parts, document site evaluations, and connect with experts for technical assistance. Available across multiple platforms.

**Highlights:** Scan & Search product specs and parts, Document site evaluations and field service, Submit inquiries for technical support, Access information for multiple SPX FLOW brands, Cross-platform support (iOS, Android, Windows)

**In-app purchases:** none


## Frequently asked questions

### Is Silverson Conversion Tools free?

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

### Is SPX FLOW eXpress free?

SPX FLOW eXpress is free to download, with no in-app purchases.

### Which has better reviews, Silverson Conversion Tools or SPX FLOW eXpress?

Silverson Conversion Tools is rated higher. Silverson Conversion Tools averages 4.7 out of 5 from 3 ratings, while SPX FLOW eXpress averages 4.0 from 8 ratings.

### Do Silverson Conversion Tools or SPX FLOW eXpress have ads?

Neither Silverson Conversion Tools nor SPX FLOW eXpress shows ads.

### Which is updated more often, Silverson Conversion Tools or SPX FLOW eXpress?

Silverson Conversion Tools ships an update every 6 months, and SPX FLOW eXpress every 2 months. Most recently, Silverson Conversion Tools was updated on June 5, 2026 and SPX FLOW eXpress on June 11, 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.*