# WeldCalcs vs Transformer Calculator.

The clearest difference is price: Transformer Calculator. at Free against WeldCalcs's $1.99. Transformer Calculator. also leads on ratings volume (47 vs 1) and update cadence (every 4 months vs every 15 months). WeldCalcs's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Transformer Calculator. is free to download; WeldCalcs costs $1.99 up front. Transformer Calculator. sells 1 one-off in-app purchase. WeldCalcs asks for nothing beyond the download.

WeldCalcs holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Transformer Calculator. has 47 ratings behind it against 1, so its average is the more settled of the two.

WeldCalcs ships an update every 15 months, Transformer Calculator. every 4 months. The most recent releases landed on June 27, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | WeldCalcs | Transformer Calculator. |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/weldcalcs/id1422441562/reviews)** | [4.8 (47 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews) |
| Number of ratings | 1 | **47** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 17 MB | 41 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Glendale Coding Labs, Inc](https://appshunter.io/developer/1266859626) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## 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


### Transformer Calculator.

[App page](https://appshunter.io/ios/app/transformer-calculator/id1506155081)

This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.

**Highlights:** Primary and secondary current calculations, Turns ratio determination, Transformer type identification, Secondary voltage calculation, Supports 1Φ and 3Φ phases, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $3.99 | one-time |


## Frequently asked questions

### Is WeldCalcs free?

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

### Is Transformer Calculator. free?

Transformer Calculator. is free to download, with in-app purchases available.

### Which has better reviews, WeldCalcs or Transformer Calculator.?

WeldCalcs is rated higher. WeldCalcs averages 5.0 out of 5 from 1 ratings, while Transformer Calculator. averages 4.8 from 47 ratings.

### Do WeldCalcs or Transformer Calculator. have ads?

Transformer Calculator. shows ads; WeldCalcs does not.

### Which is updated more often, WeldCalcs or Transformer Calculator.?

WeldCalcs ships an update every 15 months, and Transformer Calculator. every 4 months. Most recently, WeldCalcs was updated on June 27, 2026 and Transformer Calculator. on September 18, 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.*