I tried Noom for the initial "free" period. You definitely need a smart phone to use it. I found it to be way over priced for what it was. And, stopped it before my free period ran out. If you KNOW your problem is that you are eating incorrectly (you say a "bit lazy"), then there are a whole bunch more calorie counters out there that do the same thing for free, and may even work on line (I don't know....never checked). I use the Lose It app (free version). I knew all the psycho-babble that Noom spouts. I knew my problem was I ate too much .... and this is the problem with most people, honestly. So, I started counting calories. I'm naturally a very disciplined person, and had no problem recording EVERY bite of what I ate. I measured and counted (until I was certain of portion sizes). And, I lost 40 pounds over the course of about 8-9 months...usually about a pound a week, a very sustainable and healthy rate. I've maintained that weight for about the same amount of time, continuing to count calories. What I discovered, initially, is that my idea of a "portion" was wildly inaccurate. I *thought* I was eating a "portion" as stated on the label, and was actually eating MUCH more. Now, I know. And, it's been easy to keep myself at an optimal weight. Lose It has entries for many, many food items, and the few times it doesn't, it's an easy process to enter your own calorie count.
ETA: Noom doesn't require a specific diet, so you decide what you eat. It does emphasis "larger profile" foods with lower calories (e.g., salads without dressing, fresh produce, etc) because these make you feel "full" faster. But, you can eat anything you want as long as you don't go over their daily recommended calorie count. In my opinion ONLY they start with a too low recommendation. Lose It gave me an additional 200 calories per day, and I still lost weight at a perfectly acceptable rate.
Good luck!