This is very very simple but is there such a thing as an app where you input a set amount of money for the month and can just log in and subtract amounts of transactions? I feel like this would be a good visual way to get myself to pay more attention. Basically a calculator but it remembers.
I use Daak. I think it does what you are describing and I also like the option of the calendar for a good visual overview which lets you see what amount you’ve spent on a certain day.
I’ve suggested using the free version of Goodbudget to start a simple budget. The free version allows you to use 20 categories (envelopes), but nothing prevents you from using only one. You can add money to the envelope automatically if you have a regular pay schedule and amount, or add it manually if it varies. It will keep a running balance as you record transactions.