# PLC Pro vs Transformer Calculation Tool

The clearest difference is price: Transformer Calculation Tool at Free against PLC Pro's $9.99. Transformer Calculation Tool also leads on iOS requirement (13.0 vs 15.1). PLC Pro's advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs every 4 weeks). On ads and device support there is nothing between them.

Transformer Calculation Tool is free to download; PLC Pro costs $9.99 up front. Transformer Calculation Tool sells 1 one-off in-app purchase. PLC Pro asks for nothing beyond the download.

PLC Pro ships an update every 5 days, Transformer Calculation Tool every 4 weeks. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PLC Pro | Transformer Calculation Tool |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 weeks |
| Size | 47 MB | 57 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [James Johnson](https://appshunter.io/developer/1861867738) | [Shraddhaben Parmar](https://appshunter.io/developer/1889769325) |

## What reviewers say

### PLC Pro

[App page](https://appshunter.io/ios/app/plc-pro/id6757437125)

**In-app purchases:** none


### Transformer Calculation Tool

[App page](https://appshunter.io/ios/app/transformer-calculation-tool/id6772152007)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is PLC Pro free?

PLC Pro costs $9.99, with no in-app purchases.

### Is Transformer Calculation Tool free?

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

### Do PLC Pro or Transformer Calculation Tool have ads?

Neither PLC Pro nor Transformer Calculation Tool shows ads.

### Which is updated more often, PLC Pro or Transformer Calculation Tool?

PLC Pro ships an update every 5 days, and Transformer Calculation Tool every 4 weeks. Most recently, PLC Pro was updated on October 7, 2026 and Transformer Calculation Tool on October 3, 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.*