This is true but unless you have a motivation, i.e. somewhere else that money could rather be going that's somewhat immediate, you're kind of wasting your time (IMO).
If you want a vacation and couldn't afford it or you wanted some cool home gadget and couldn't afford it then sure, delve into your finances. But if that money you're saving is just going to sit around then what's the point? If you already have a rainy day and a 401K or equivalent, then you're good. Ultimately money is worthless if you don't use it.
The reason I say this is because tracking money is not free. It's a mental burden. Do you really want that to be your business? How much mental energy are you willing to give it?
Because it sounds simple until you really want a coffee after work, but it turns out you don't have the budget and then you sit and cry in your car because that hypothetical coffee was the one thing tying you to reality.
