# WeldCalcs vs CSiSteel

The clearest difference is price: CSiSteel at Free against WeldCalcs's $1.99. CSiSteel also leads on update cadence (every 3 weeks vs every 15 months) and ratings volume (7 vs 1). On rating, ads, in-app purchases and device support there is nothing between them.

CSiSteel is free to download; WeldCalcs costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for WeldCalcs against 5.0 for CSiSteel. That said, the two scores are not equally well evidenced: CSiSteel has 7 ratings behind it against 1, so its average is the more settled of the two.

WeldCalcs ships an update every 15 months, CSiSteel every 3 weeks. The most recent releases landed on June 27, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | WeldCalcs | CSiSteel |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/weldcalcs/id1422441562/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/csisteel/id1435293643/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 17 MB | 19 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

### WeldCalcs

[App page](https://appshunter.io/ios/app/weldcalcs/id1422441562)

This engineering calculator app assists in the preliminary sizing of fillet welds for steel construction. It computes section properties for typical welding patterns, allowing users to input dimensions and applied forces/moments to determine the maximum resisting resultant force and initial weld size.

**Highlights:** Fillet weld design sizing, Section property calculation, Elastic Method calculations, Input dimensions and forces, Determines maximum resisting force, Reference equations available

**Features:** macOS Compatibility

**In-app purchases:** none


### CSiSteel

[App page](https://appshunter.io/ios/app/csisteel/id1435293643)

This app provides a comprehensive library of steel sections and their structural properties. It helps users find optimum sections for design, search for equivalents, and sort by various parameters. Ideal for engineers, suppliers, teachers, and students involved in steel design projects.

**Highlights:** Comprehensive steel section library, Find equivalent steel sections, Search and sort by section properties, Supports ASD and LRFD methods, Includes AISC, CISC, and Arcelormittal sections

**In-app purchases:** none


## Frequently asked questions

### Is WeldCalcs free?

WeldCalcs costs $1.99, with no in-app purchases.

### Is CSiSteel free?

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

### Which has better reviews, WeldCalcs or CSiSteel?

WeldCalcs and CSiSteel are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.

### Do WeldCalcs or CSiSteel have ads?

Neither WeldCalcs nor CSiSteel shows ads.

### Which is updated more often, WeldCalcs or CSiSteel?

WeldCalcs ships an update every 15 months, and CSiSteel every 3 weeks. Most recently, WeldCalcs was updated on June 27, 2026 and CSiSteel on July 5, 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.*