How to download and setup CardKit
Open terminal and run command
                                            git clone https://github.com/carson-katri/CardKit.git
                                        
                                        git clone is used to create a copy or clone of CardKit repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with CardKit https://github.com/carson-katri/CardKit/archive/master.zip
Or simply clone CardKit with SSH
                                            [email protected]:carson-katri/CardKit.git                                    
                                    If you have some problems with CardKit
You may open issue on CardKit support forum (system) here: https://github.com/carson-katri/CardKit/issuesSimilar to CardKit repositories
Here you may see CardKit alternatives and analogs
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