No personal data is stored on the app and there is no backend. The login credendials are stored on the Local Storage of the browser on the user's machine.
The tools shows both the raw data and the data after a Kalman filter (R=0.1, Q=0.1) is applied. What is highlighed is the data AFTER the application of the filter.
The trend values are based on Double Exponential Smoothing learned over the raw data of the last day. Parameters are optimized looking at 20 possible values evenly distributed.
npm install
npm run serve