# SIMATIC WinCC OA UI vs Electrical Calculation Tools

The clearest difference is price: SIMATIC WinCC OA UI at Free against Electrical Calculation Tools's $1.99. SIMATIC WinCC OA UI also leads on update cadence (every 2 months vs every 5 months). Electrical Calculation Tools's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

SIMATIC WinCC OA UI is free to download; Electrical Calculation Tools costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SIMATIC WinCC OA UI ships an update every 2 months, Electrical Calculation Tools every 5 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | SIMATIC WinCC OA UI | Electrical Calculation Tools |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/simatic-wincc-oa-ui/id1073943068/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 70 MB | 37 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## What reviewers say

### SIMATIC WinCC OA UI

[App page](https://appshunter.io/ios/app/simatic-wincc-oa-ui/id1073943068)

Monitor and control your SIMATIC WinCC OA plant remotely from your smartphone or tablet. Access the same powerful functionality as the desktop interface, ensuring secure and reliable real-time operation from anywhere.

**Highlights:** Remote plant monitoring, Real-time control, Multiple system connections, Secure data transmission, Intuitive mobile interface

**In-app purchases:** none


### Electrical Calculation Tools

[App page](https://appshunter.io/ios/app/electrical-calculation-tools/id6446797237)

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

**In-app purchases:** none


## Frequently asked questions

### Is SIMATIC WinCC OA UI free?

SIMATIC WinCC OA UI is free to download, with no in-app purchases.

### Is Electrical Calculation Tools free?

Electrical Calculation Tools costs $1.99, with no in-app purchases.

### Do SIMATIC WinCC OA UI or Electrical Calculation Tools have ads?

Neither SIMATIC WinCC OA UI nor Electrical Calculation Tools shows ads.

### Which is updated more often, SIMATIC WinCC OA UI or Electrical Calculation Tools?

SIMATIC WinCC OA UI ships an update every 2 months, and Electrical Calculation Tools every 5 months. Most recently, SIMATIC WinCC OA UI was updated on October 24, 2026 and Electrical Calculation Tools on October 24, 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.*