I used to weigh daily but stopped because I was freaking out/obsessing over the number, but that was before I realized and understood that fluctuations are to be expected. In fact, some people can see a 10lb fluctuation in ONE day. Your hormone levels, the amount of food in your GI tract, sodium, Water, muscle water retention..and so many other things all play a role in the number the scale spits out at you.
I started weighing weekly but have gone back to daily weigh-ins as I am looking to lose the last 5-10 and then I have plans to gain some mass, so daily weighing will be optimal for me. If anything, my suggestion is to use the scale, use measurements, and use your clothing as judging points. If you're dropping clothing sizes, you're losing fat and doing what you should be doing