I record my expenses with HelloExpense[1] on Android, and I wrote a small app to analyse the csv export (using Python with Dash[2]).
The code of the analysis app is available on Gitlab[3] and a demo is deployed on heroku at https://expenses-analysis.herokuapp.com/ (note that all work is done server side, so if you use it with your own CSV file, it will be uploaded to the server, so it's definitely better to run it locally)
It suits my needs perfectly, and I find it very useful, but from what I know I'm the only user of my analysis app :-D
Understanding where your money goes is a first good step in managing your finances.