TCW Control vs IO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TCW Control
Monitor and control TCW Ethernet controllers from your mobile device. View sensor data, input status, and manage relay outputs. Requires a TCW controller with updated firmware and a static IP address.
- Display sensor values
- Display analog and dry contact inputs
- Control relay outputs
- Add descriptions to monitored parameters
- Monitor home automation systems
- Environment monitoring
- Control heating/cooling systems
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TCW Control allows you to monitor and control your TCW controllers. Entering the IP address and HTTP port of your installed Ethernet controller, this application will be able to display the data on your mobile device. To ensure proper operation, please make sure you have the following conditions: - your TCW controller is updated with the latest firmware version (available at www.teracomsystems.com) - your TCW controller has static IP address Features: - display sensor values - display analog and dry contact inputs - control relay outputs - adding descriptions of monitored parameters Typical applications: - home automation - environment monitoring - control of heating/cooling systems Supported devices: - TCW122B-CM - TCW181B-CM - TCW240 - TCW241 - TCW220 - TCW210-TH More info at www.teracomsystems.com.
IO
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Forget paper checklists. Check I/Os directly on the machine – where sensors and actuators are located. IO-INSPECTOR is an independent third-party tool for commissioning and functional testing in industrial automation environments. With your iPad or iPhone you can observe, document and - if approved, technically permissible and safety-compliant - switch/control signals on site. Less shouting in the workshop, less manual checking and more clarity right where the work takes place. WHY IO-INSPECTOR? • Project and variable import (for TIA Portal® projects): Import variable lists from common export formats (e.g. .xlsx or .csv). IO-INSPECTOR adopts the structure, data types and comments from the file provided - manual re-entry is not necessary. • HMI View Smart Connector: Quickly connect to your system and conveniently access information relevant to commissioning. The Smart Connector is intended to simplify connection and access to the required displays/views in practice - without having to imply an official manufacturer affiliation. • Fast system connection: Detect and connect devices in the local network quickly and clearly. • Live status and targeted control (OPC UA): Connect to compatible controllers via OPC UA and check signals in real time. • Observe: Track changes immediately. OPC is also accessible via the WebSocket protocol. • Control: Set outputs or markers specifically (Force/Modify), provided this is activated in the environment and meets the safety requirements. • Diagnostics: Identify problems more quickly, such as cabling or logic problems. • Digital documentation (PDF): Check off test steps digitally, add notes (e.g. “Sensor defective”, “Adjustment required”) and export a PDF report with your company logo and timestamp. • Filter and search: Filter by status (“Open”, “Done”) or search directly by symbol name. • Mark changes (round-trip support): Mark typos or name adjustments in the app so that you can later apply them in your engineering project in a controlled manner. • Share and collaborate on projects: Share projects so colleagues can continue with the same project status - including testing status and documentation progress (depending on the sharing/export method chosen). TECHNICAL NOTES/REQUIREMENTS • Compatibility: Developed for environments with SIMATIC® S7-1200 (FW 4.0+) and SIMATIC® S7-1500. • OPC UA: OPC UA must be activated on the CPU. Basic access may not require an additional license depending on your configuration; Actual requirements depend on device, firmware and project configuration. • Signals: Supports digital and analog signals (depending on project/export data and target system). • Network/Offline: Use in the machine's local WLAN; Project-related features can also be available without the Internet (depending on the scope of functions). PRICES • Download IO-INSPECTOR for free to create projects and use network scanning. Upgrade options are available for extended functions (e.g. project import, HMI write access (power tags), PDF export, OPC interface, HMI Smart Connector). • Download IO-INSPECTOR and simplify commissioning. Legal notice/trademark: IO-INSPECTOR is an independent third-party software. SIMATIC®, TIA Portal®, S7® as well as S7-1200 and S7-1500 are trademarks of Siemens AG. This app has no business relationship with Siemens AG and is not developed, supported or distributed by Siemens. All product and company names are used solely to describe compatibility and belong to their respective owners.
Screenshots
Verdict
The clearest difference is in-app purchases: TCW Control at none against IO's 1. TCW Control also leads on iOS requirement (7.0 vs 17.6). IO's advantage is update cadence (every 2 weeks vs every 5 months). On price, ads and device support 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
Both are free to download. IO sells 1 one-off in-app purchase. TCW Control asks for nothing beyond the download.
TCW Control ships an update every 5 months, IO every 2 weeks. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.
| Parameter | TCW Control | IO |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 14.3% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 35 MB | 15 MB |
| Age rating | 4+ | +4 |
| Developer | Teracom OOD | CJ Solution UG (haftungsbeschraenkt) |
In-app purchases
TCW Control
No in-app purchases
IO
- Pro Version Lifetime$17.99









