* This is a GitHub OAuth App, which calls GitHub API to get data.
referring GitHub Authorizing OAuth Apps
https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/authorizing-oauth-apps

* Data flow is one directional. There is not any insert, update or delete which goes back to GitHub.

* You could sign-in with your GitHub or use the app as a guest.

* The sign-in uses GitHub OAuth API and the token is securely stored in your key chain.

* This app can aggregate your GitHub repositories by customizable labels and show the coding pattern changing with time.

* For the chart settings, you could configure filter criteria (last n weeks) and group by criteria (aggregated by n weeks).

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In-App Purchase:

* Free version could add 5 repositories to bookmarks. You could purchase for unlimited bookmarks.

* Charts provide original data source in json or csv files. You need to enable the export function.

* You could also visualize public GitHub repositories by adding their url to the bookmarks. You need to enable the external url function.