# STS vs El búho 24/7

The clearest difference is update cadence: STS at every 5 months against El búho 24/7's every 16 months. STS also leads on iOS requirement (12.2 vs 15.6). 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.

STS ships an update every 5 months, El búho 24/7 every 16 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | STS | El búho 24/7 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sts-soft-starter-simulation/id1409663811/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 16 months |
| Monetization | Free | — |
| Size | 67 MB | 88 MB |
| Requires iOS | **12.2** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [Tamilarasan Kannan](https://appshunter.io/developer/1500116258) |

## What reviewers say

### STS

[App page](https://appshunter.io/ios/app/sts-soft-starter-simulation/id1409663811)

This utility helps users select the appropriate Siemens soft starter for their specific needs. It simulates applications based on various parameters and provides detailed reports, with direct links to product data.

**Highlights:** Soft starter application simulation, Input data for environment, motor, and load, Starting parameter configuration, Suggested soft starter selection, Simulation and component reports, Direct access to Siemens Industry Mall data

**In-app purchases:** none


### El búho 24/7

[App page](https://appshunter.io/ios/app/el-buho-247/id6689513672)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STS free?

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

### Is El búho 24/7 free?

El búho 24/7 is free to download, with no in-app purchases.

### Do STS or El búho 24/7 have ads?

Neither STS nor El búho 24/7 shows ads.

### Which is updated more often, STS or El búho 24/7?

STS ships an update every 5 months, and El búho 24/7 every 16 months. Most recently, STS was updated on October 25, 2026 and El búho 24/7 on October 27, 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.*