If you want to install and use the Greetings from the Galaxy — Turn your Photos into Amazing Postcards for No Man's Sky app on your PC or Mac, you will need to download and install a Desktop App emulator for your computer. We have worked diligently to help you understand how to use this app for your computer in 4 simple steps below:

Step 1: Download an Android emulator for PC and Mac

Ok. First things first. If you want to use the application on your computer, first visit the Mac store or Windows AppStore and search for either the Bluestacks app or the Nox App >> . Most of the tutorials on the web recommends the Bluestacks app and I might be tempted to recommend it too, because you are more likely to easily find solutions online if you have trouble using the Bluestacks application on your computer. You can download the Bluestacks Pc or Mac software Here >> .  

Step 2: Install the emulator on your PC or Mac

Now that you have downloaded the emulator of your choice, go to the Downloads folder on your computer to locate the emulator or Bluestacks application.
Once you have found it, click it to install the application or exe on your PC or Mac computer.
Now click Next to accept the license agreement.
Follow the on screen directives in order to install the application properly.
If you do the above correctly, the Emulator app will be successfully installed.

Step 3: for PC - Windows 10 / 11

Now, open the Emulator application you have installed and look for its search bar. Once you found it, type Greetings from the Galaxy — Turn your Photos into Amazing Postcards for No Man's Sky in the search bar and press Search. Click on Greetings from the Galaxy — Turn your Photos into Amazing Postcards for No Man's Skyapplication icon. A window of Greetings from the Galaxy — Turn your Photos into Amazing Postcards for No Man's Sky on the Play Store or the app store will open and it will display the Store in your emulator application. Now, press the Install button and like on an iPhone or Android device, your application will start downloading. Now we are all done.
You will see an icon called "All Apps".
Click on it and it will take you to a page containing all your installed applications.
You should see the icon. Click on it and start using the application.