I started keto with this link and used the calculator to figure out calories/day and how much I'd lose, etc.... regardless of going keto, I thought the calculator was useful.
https://www.reddit.com/r/keto/wiki/faq
I use the LoseIt app, don't know how much better/worse it is than MyFitnessPal... it lets you scan in food with barcodes, which is pretty nice, and gives you a daily and weekly breakdown of nutrition.
I think that level of tracking is the best thing someone can do... I've known a lot of people who start exercising and cutting out certain foods, etc; but don't track calories and then get frustrated when they aren't losing weight.