I’ve written a web app that creates a graph of all TFL transactions over the past 12 months.
You can see it working here: http://londoncommute.uk
It’s 100% open source and on github: https://github.com/ElliottLandsborough/monzo-balance
It was made so that I could brush up on react/laravel/docker and the monzo api (and to prove to myself that I don’t need to buy a year long travel card!)
It’s not entirely finished but works for the most part.
Hopefully people will find it useful.
Here’s a preview: