Comparison

RealVNC Viewer vs cMT Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RealVNC Viewer

Access and control your Mac, Windows, or Linux computers remotely from any device. View your desktop, use your keyboard and mouse, and manage files securely with end-to-end encryption. Sync connections across all your devices for seamless access.

Highlights
  • Instant remote access to computers
  • Control mouse and keyboard remotely
  • End-to-end session encryption
  • Cloud service for easy connection
  • Backup and sync connections
  • Virtual keyboard with advanced keys
  • Bluetooth keyboard support
Features
Read full description

RealVNC® Viewer from RealVNC® gives you instant remote access to your Mac, Windows and Linux computers from anywhere in the world. You can view your computer's desktop, and control its mouse and keyboard as though you were sitting down in front of it. Download RealVNC Connect to each computer you want to control. Then sign in to RealVNC Viewer on your device using your RealVNC account credentials. You'll see your computers automatically appear; simply tap to connect. RealVNC Connect password-protects each computer out-of-the-box. You may need to enter the same user name and password you use to log in to your computer. All sessions are then encrypted end-to-end. During a session, your device's touch screen serves as a trackpad to give you precise control. Drag your finger to move the remote mouse cursor and tap anywhere to left-click (other gestures such as right-click and scroll are explained in-app). As the original inventors of VNC remote access technology, we're confident you'll love what RealVNC Viewer has to offer. If you're still not convinced, check out our reviews! ===Key features=== - Connect with ease via our cloud service to computers running RealVNC Connect. - Backup and sync your connections between all your devices by signing in to RealVNC Viewer on each one. - A scrolling bar above the virtual keyboard includes advanced keys such as Command/Windows. - Support for Bluetooth keyboards. ===Contact=== We’d love to hear from you: iphone-support@realvnc.com twitter.com/RealVNC facebook.com/realvnc Better still, leave us a review!   ===Terms of Use=== https://static.realvnc.com/media/documents/RealVNCServicesTCs.pdf ===Trademarks=== RealVNC and VNC are trademarks of RealVNC Limited and are protected by trademark registrations and/or pending trademark applications in the European Union, United States of America and other jurisdictions. Protected by UK patents 2481870, 2479756; US patent 8760366; EU patent 2652951.

About

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.

Highlights
  • 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
Features
Read full description

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/

Screenshots

RealVNC Viewer4 screens
cMT Viewer2 screens

Verdict

The call

RealVNC Viewer and cMT Viewer both sit at 4.8 stars, but that hides the real split: 72% of RealVNC Viewer's written reviews are positive against 43% of cMT Viewer's. RealVNC Viewer also leads on ratings volume (15K vs 8). cMT Viewer's advantage is iOS requirement (12.0 vs 15.0). On price, rating, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for RealVNC Viewer against 4.6 for cMT Viewer. That said, the two scores are not equally well evidenced: RealVNC Viewer has 15K ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 72% of RealVNC Viewer's written reviews are positive against 43% of cMT Viewer's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

Scorecard3 real differences · 7 level
RealVNC Viewer versus cMT Viewer: the parameters behind the verdict, then further details
ParameterRealVNC ViewercMT Viewer
PriceFreeFree
Rating4.8 (15K ratings) — better4.6 (8 ratings)
Positive reviews72.3% of reviews — better42.9% of reviews
Number of ratings15K — better8
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size9 MB67 MB
Age rating4+4+
DeveloperRealVNCWeintek Labs., Inc.

Customer experience

RealVNC Viewer

All ratings15,340 ratings
Positive94.8%
Neutral2.0%
Negative3.1%
Written reviews1,525 reviews
Positive72.3%
Neutral7.1%
Negative20.7%

cMT Viewer

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews7 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

Bugs and requests

RealVNC Viewer

Reported bugs

4 issues
  • Cursor and screen synchronization issues
  • Incompatibility with certain macOS and iOS versions
  • Frequent disconnections and login problems
  • Keyboard input not working as expected

Requested features

5 requests
  • Add support for audio streaming
  • Improve clipboard and file transfer functionality
  • Provide better multi-monitor support
  • Allow customization of keyboard and mouse controls
  • Implement a true touch-based interface

cMT Viewer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

RealVNC Viewer

No in-app purchases

None

cMT Viewer

No in-app purchases

Questions

Is RealVNC Viewer free?
RealVNC Viewer is free to download, with no in-app purchases.
Is cMT Viewer free?
cMT Viewer is free to download, with no in-app purchases.
Which has better reviews, RealVNC Viewer or cMT Viewer?
RealVNC Viewer is rated higher. RealVNC Viewer averages 4.8 out of 5 from 15K ratings, while cMT Viewer averages 4.6 from 8 ratings.
Do RealVNC Viewer or cMT Viewer have ads?
Neither RealVNC Viewer nor cMT Viewer shows ads.
Which is updated more often, RealVNC Viewer or cMT Viewer?
RealVNC Viewer ships an update every 2 months, and cMT Viewer every 2 months. Most recently, RealVNC Viewer was updated on November 3, 2026 and cMT Viewer on November 1, 2026.

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