Scales

It depends on your goals, honestly.

If you are trying to lose a large amount of weight, you do not need to track yourself more than once per week to ensure that you are moving in the right direction because your body sheds weight quickly when it has a lot to lose.

If you are working to lose a smaller amount of weight, aka those stubborn last 5-10lbs, I would suggest using a trend projection app like Libra where you weigh in every morning so that it can predict your future losses/gains based on daily activity. This is intense, but it provides a tight grip on your process, which I find is very helpful in the last stages of weight loss. This is where the body will fight you hardest, and little things like a 200 calorie snack a few times a week can throw you for a loop that wouldn't have mattered 15 lbs ago.

As far as digital vs analogue, I do prefer digital. There is a fantastic scale you can get on amazon here that I use, it is very affordable and it comes with bodyfat calipers and body measuring tape. I do not trust scales that tell you bodyfat based on height, they do not take muscle mass, bodytype, frame size, etc into consideration and are often waaay off.

I use the Fitbit Aria. does all i need. people get hung up on what scale gives the most accurate number, but its more about the trends and not if the scale is off a half pound here or there. I like the Aria because it automatically updates to the Fitbit app then that updates to MFP so i don't have to record it. just step on it, wait 20 seconds and go.

I'm no bodybuilder so while the Aria does track BF%, its not crucial to me if that is accurate or not. i don't think there is any scale if i cared about BF%'s that would be accurate.