iS7 vs STS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iS7
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--- Industrial automation tool --- Read and write variables on Siemens S7 PLC (input, output, timer, counter, memory and data block) Manage a virtual push button for remote operations, with configurable I/O, for custom use. Check operative status of S7.300 and S7.400 PLC Link the new S7.1200 and S7.1500 series and, on the last release, also the little LOGO PLC. For all detailed informations please visit support website. http://www.trotti.eu/iS7/index.html
STS
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.
- 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
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This application allows users to find the right Siemens soft starter for his specific application. Features: * Simulate a soft starter application based on your input data: ** Environment & supply ** Motor ** Load ** Starting parameters for the application ** Additional functions ** Starting profile * Select a suggested soft starter * Generate a report for a selected soft starter with the summary of the simulation and optional feeder main components * Direct access to selected soft starter data in the Siemens Industry Mall * Metrics: SI and Imperial * Languages: English, German, Chinese, French, Spanish, Portuguese, Turkish, Czech, Italian and Russian
Screenshots
Verdict
The clearest difference is price: STS at Free against iS7's $14.99. STS also leads on in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
STS is free to download; iS7 costs $14.99 up front. iS7 sells 1 one-off in-app purchase. STS asks for nothing beyond the download.
iS7 ships an update every 3 months, STS every 5 months. The most recent releases landed on December 9, 2025 and June 29, 2026 respectively.
| Parameter | iS7 | STS |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 12.2 |
| Further details — not scored | ||
| Size | 45 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlo Trotti | Siemens AG |
In-app purchases
iS7
- Alarms$2.99
STS
No in-app purchases
