# feiffer combine vs STS

The clearest difference is in-app purchases: STS at none against feiffer combine's 10. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. feiffer combine sells 10 one-off in-app purchases. STS asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for feiffer combine against 5.0 for STS. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

feiffer combine ships an update every 6 months, STS every 5 months. The most recent releases landed on August 1, 2026 and June 29, 2026 respectively.

## The numbers

| Metric | feiffer combine | STS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/feiffer-combine/id875043795/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sts-soft-starter-simulation/id1409663811/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 68.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 67 MB |
| Requires iOS | 13.0 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrea Feiffer](https://appshunter.io/developer/875043798) | [Siemens AG](https://appshunter.io/developer/394503271) |

## What reviewers say

### feiffer combine

[App page](https://appshunter.io/ios/app/feiffer-combine/id875043795)

This app provides a step-by-step guide for calibrating combine harvesters to achieve optimal settings. It adapts to throughput and losses, ensuring proper adjustment for all harvest conditions and performance ranges, thereby limiting losses.

**Highlights:** Step-by-step calibration guide, Optimal combine harvester settings, Adapts to throughput and losses, Field-tested and reliable values, Quick and safe calibration, Demo version available

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| John Deere 2054 | $29.99 | one-time |
| Claas Trion 720 | $29.99 | one-time |
| Claas Trion 660 | $29.99 | one-time |
| Claas Trion 730 | $29.99 | one-time |
| Claas Trion 640 | $29.99 | one-time |
| Claas Trion 520 | $29.99 | one-time |
| Claas Trion 530 | $29.99 | one-time |
| Claas Trion 650 | $29.99 | one-time |
| John Deere S 785 | $29.99 | one-time |
| Claas Trion 750 | $29.99 | one-time |


### 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


## Frequently asked questions

### Is feiffer combine free?

feiffer combine is free to download, with in-app purchases available.

### Is STS free?

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

### Which has better reviews, feiffer combine or STS?

feiffer combine and STS are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do feiffer combine or STS have ads?

Neither feiffer combine nor STS shows ads.

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

feiffer combine ships an update every 6 months, and STS every 5 months. Most recently, feiffer combine was updated on August 1, 2026 and STS on June 29, 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.*