cMT Viewer vs Sm@rtClient
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
cMT Viewer
This application allows for the visual control of HMI hardware and software directly on an iPad. It offers seamless integration with powerful project editor software, enabling intuitive multi-touch gesture operation for data display and trend analysis.
- Multiple iPad clients
- Simultaneous operation of multiple HMI servers
- Intuitive multi-touch gestures
- Fluid and vivid visualization
- Account management for access privileges
- Hot project switching
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Breaking through the architecture of HMI hardware and software, we freed HMI from its traditional combination with LCD panel and touch screen, and perfectly integrated HMI’s visual control into iPad with the powerful EasyBuilder project editor software. Not only do we inherit the advantage of traditional HMI and the motto of “Make Things Easy,” we also encourage infinite innovation in HMI technology and lead HMI into the cloud. FEATURE ● Multiple iPad Clients A cMT-SVR can be operated by three iPads simultaneously, and by Account Management in EasyBuilder, user accounts and access privileges can be managed properly. ● One iPad, Multiple cMT-SVRs An iPad can connect to operate up to 253 cMT-SVRs, and 3 of the connected cMT-SVRs can be set as hot projects for instant switch in operation. ● Break with Tradition Embrace the Trend Through the integration of iPad and EasyBuilder, cMT Viewer, requiring no additional learning, break the public image of traditional HMI operation. By multi-touch-gesture-enabled Trend Display, Data Display, etc., you can immediately experience fluid and vivid visualization as well as the most intuitive HMI operation. Learn more: http://www.weintek.com/global/
Sm@rtClient
Remotely operate and monitor industrial HMI systems from your mobile device. Access operator stations, view system layouts, and interact with hardware buttons via touch input. Supports various SIMATIC HMI systems and offers both view-only and coordinated operation modes.
- Remote operation of HMI systems
- View-only monitoring mode
- Coordinated operation with active remote control
- Access to hardware buttons
- Automatic HMI panel detection
- Browser-based access to Unified Panels
- WebView access to PLC webpages
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The SIMATIC WinCC Sm@rtClient App, in combination with the SIMATIC WinCC Sm@rtServer, allows remote mobile operation and observation of SIMATIC HMI systems over Industrial Ethernet/WLAN (wireless). The app offers support for WebClient on Unified Panels, expanding accessibility through browser-based interfaces. It also supports WebView-based access to legacy webpages on PLCs, enabling users to access View of Things (VoT) pages. The app is available for SIMATIC HMI Comfort Panels, SIMATIC WinCC Runtime Advanced, SIMATIC Unified Panels, and PLCs. The scope of the Sm@rtClient concept allows an operator station to make its display available to the app. The station takes on the role of a Sm@rtServer, while the smartphone or tablet acts as the Sm@rtClient. Sm@rtServer functionality can be easily enabled with a single mouse click in the device’s configuration settings. The screen can be displayed on the Sm@rtClient in "View only" mode, or a full-fledged, coordinated operation can be set up. Coordinated operation ensures that only one user has control at a time — either the operator station with Sm@rtServer or the Sm@rtClient app. Additionally, the app supports easy connection setup through automatic HMI panel detection. The Sm@rtClient app not only shows the selected HMI screen but also mirrors the complete device layout, including functional hardware buttons. This enables users to interact with the system as if they were physically present in front of the panel — except buttons are triggered via touch input on the mobile screen. Functions: * Access to operator stations for the operation and setup of large, spatially separated machines * Flexible solution for safe and location-independent access to operator stations * Global access to plants (e.g. for service or maintenance staff) * Full access to hardware buttons on your Comfort Panel * Easy discovery of available Sm@rtServers * Coordinated operation through active remote control * View-only mode for passive monitoring * Support for WebClient on Unified Panels for browser-based access * Support for WebView-based access to legacy webpages on PLCs, enabling access to View of Things (VoT) pages
Screenshots
Verdict
The clearest difference is review sentiment: cMT Viewer at 43% against Sm@rtClient's 0%. cMT Viewer also leads on update cadence (every 2 months vs every 10 months) and iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
cMT Viewer ships an update every 2 months, Sm@rtClient every 10 months. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.
| Parameter | cMT Viewer | Sm@rtClient |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (8 ratings) — better | — |
| Positive reviews | 42.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 67 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Weintek Labs., Inc. | Siemens AG |
Customer experience
cMT Viewer
Sm@rtClient
In-app purchases
cMT Viewer
No in-app purchases
Sm@rtClient
No in-app purchases








