This is the backend REST API for a simple budget tracker App. You can view it here https://budget.andrija.rs. It integrates with Google for authentication to enable multi device connectivity. The frontend web application is located here https://github.com/Amdrija/BudgetAppWeb.
The application let's you manage your budget by creating, editing and deleting expenses and incomes.
It comes with a set of predetermined list of categories which you can expand and remove/edit an existing category.
There is also filtering capability on the expenses, depending on the date range, value, category etc.