"Spend Analytics" is an app to help visualise your day-to-day spending. It keeps track of your overall and monthly expenditure and gives it a chart form to visualise. It neither affiliated with any website nor any organisation. The app does not require any special permissions to run. The app does not save your data to any server or website. It stores the data in its in-built database. Once, uninstalled the data will be lost.
*(Now the data can be stored in CSV files, But it requires Storage access)