# WeldEquations vs CSiUnits

The clearest difference is update cadence: CSiUnits at monthly against WeldEquations's every 12 months. CSiUnits also leads on iOS requirement (9.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

WeldEquations ships an update every 12 months, CSiUnits monthly. The most recent releases landed on September 27, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | WeldEquations | CSiUnits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/csiunits/id1344138128/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | — | Free |
| Size | 7 MB | 13 MB |
| Requires iOS | 26.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Glendale Coding Labs, Inc](https://appshunter.io/developer/1266859626) | [Computers and Structures, Inc.](https://appshunter.io/developer/1119970032) |

## What reviewers say

### WeldEquations

[App page](https://appshunter.io/ios/app/weldequations/id1266859627)

**Features:** macOS Compatibility

**In-app purchases:** none


### CSiUnits

[App page](https://appshunter.io/ios/app/csiunits/id1344138128)

This application provides a comprehensive tool for converting units across various scientific disciplines and everyday needs. It offers over 70 conversion options, catering to professionals, students, and anyone requiring precise unit transformations.

**Highlights:** Multiple one-time conversion lists, Conversions for lifestyle and science, Over 70 conversion options, Numeric value input, Converted values to all possible units

**In-app purchases:** none


## Frequently asked questions

### Is WeldEquations free?

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

### Is CSiUnits free?

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

### Do WeldEquations or CSiUnits have ads?

Neither WeldEquations nor CSiUnits shows ads.

### Which is updated more often, WeldEquations or CSiUnits?

WeldEquations ships an update every 12 months, and CSiUnits monthly. Most recently, WeldEquations was updated on September 27, 2026 and CSiUnits on September 17, 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.*