# STS vs STS

The clearest difference is update cadence: STS at every 2 weeks against STS's every 5 months. 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, STS every 2 weeks. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | STS | STS |
| --- | --- | --- |
| 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 2 weeks** |
| Monetization | Free | — |
| Size | 67 MB | 12 MB |
| Requires iOS | **12.2** | 13.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [中铁工程装备集团有限公司](https://appshunter.io/developer/1447605449) |

## 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


### STS

[App page](https://appshunter.io/ios/app/sts-mobile/id1538528756)

**In-app purchases:** none


## Frequently asked questions

### Is STS free?

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

### Is STS free?

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

### Do STS or STS have ads?

Neither STS nor STS shows ads.

### Which is updated more often, STS or STS?

STS ships an update every 5 months, and STS every 2 weeks. Most recently, STS was updated on October 8, 2026 and STS on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*