If you're building a custom dashboard, and are looking for something to draw your charts that is easy to implement, and free to use, check out Google's Charts libraries (https://developers.google.com/chart/
). They guarantee three years of backwards compatibility, so there are minimal updates required. And you can just add the links in your code to make sure that the libraries you're using are current.
You can also specify a specific version, if you want to make sure that there are no surprises. Check out Google's KB article on loading these libraries for more information - https://developers.google.com/chart/interactive/docs/basic_load_libs