Before FIRE, we never tracked spending, because it didn't matter as much. It was easy to see that most of our income was going into savings and investments, every month. Since FIREing in 2016, we've been dutifully using AndroMoney to track all of our spending. If anything, keeping a close eye on spending in FIRE seems like it allows us to feel comfortable spending much more than we would be inclined to otherwise. As naturally frugal people, DW & I would probably never feel okay spending as much as we have been in retirement, if it weren't for the fact that we can easily look at our spending history, over the past 67 months, and see that we're way below what we could be spending. For 2021, we're on track to spend about 2.3% of total invested assets. Knowing that, and being able to see the numbers in black and white, makes it much easier to relax and feel okay about going out to dinner, once in a while, buying a new bicycle, taking a trip, or whatever.