I've been testing out Viewflip, and I have to say, it works really well! It's similar to GetScreen, but the cool thing about Viewflip is that it focuses on sharing individual Windows/Mac apps. You can share your entire desktop if you want, but the standout feature is the ease of screen sharing just one app at a time.

Here’s a quick rundown of the setup process:
How to Share a Screen/App:

- Download the App: Sign up and verify your email, then pick a username.
- Get Ready to Share: Before you connect with someone else, make sure to focus on the Windows or Mac app you want to share.
- Connect with a Friend: Select the user you want to share with and establish the connection.
- Permission Prompt: The remote user will get a prompt asking if they want to view your screen (they can accept or deny).

Security:
One neat security feature is that the person requesting the connection is the one who shares their desktop or app. This helps keep things secure and prevents unauthorize entry.

Speed:
I tested it on two PCs side by side (connected through different ISPs), and I tried playing some video files and streaming YouTube. Everything ran smoothly on the remote side—no hiccups at all!

Pros:
- Quick Setup: Super easy to get started.
- Fast Streaming: Connections are speedy and reliable.
- User-Friendly: Very straightforward to use.
- No Residual Processes: The app doesn’t stick around in memory after you quit it, which is a nice change from some other remote desktop apps that still reside in memory despite main app being closed.
- Ability to switch from screen sharing a single app to entire desktop with click of a button.
- Free plan for everyone means you could assist anyone and they wouldn't need to pay for a subscription/license. My remote desktop was setup as a free user and I noted that my plan showed "TRIAL"

Cons:
- CPU/RAM Usage: It can be a bit heavy on CPU and RAM.
-Minor Bugs: I noticed the connection dialog sometimes hid in the background, so I had to minimize all apps to find it (This was on a windows PC). They should definitely make that dialog stay on top! Also, when I closed the app being shared, Viewflip seemed confused and thought it was still running, which left me with a blank window on the remote side.
- Website and app UI needs a make over
- Relatively new/unknown?

In summary, think of Viewflip as a tailored version of GetScreen or TeamViewer. Overall, it's a great choice for anyone wanting to screen share apps effortlessly!