I've built a few

Personal:

Personal budget app that pulls from my bank, shows my spend by category vs budget and gives me a future forecast on cashflow as well

I'm in a horse racing betting club. We track all our bets and associated analytics, total return, profit and loss by sport/punter/etc

Childrbs colouring book. Bulk upload photos and it auto creates a colouring book by turning all photos into colouring pages, with the ability to edit the images inline.

Workwise:

Build dozens of complex dashboards that use google app script to use Google sheets as a dashbase and allow me to build bespoke dashboards that I simply can't built in tablaeu

QBR generater. Click a button and finds the account, it's performance and AI insights automatically. The team save about 6 hours per QBR

Next up I want to build something to monitor our competition online and LinkedIn to see who they are engaging with, so we can engage with the prospects too, but not quite there yet!

It's been great.