Noom is a daily series of tasks that help you learn what a long term healthy lifestyle should be. I spend about half an hour a day reading the articles, logging food, and tracking my weight. Noom doesn't actually tell you to follow a particular diet or restrict food. They aim is to provide you with tools and support backed by scientific research to help you work out that will motivate you to change and ultimately lose weight and be more active.
They assign you a personal coach. They help you review your current lifestyle and work with you to set goals that will bring about positive change.
There is also a support group and a group coach who checks in and offers more motivation.
The approach is, if you want to lose weight you need to set small goals, create a plan on how you are going to do that and then believe in yourself that you will do it. Your goal coach helps you plan and your group coach keeps you motivated to keep going.
If you are looking for a quick fix, that promises instant weight loss by eating this set food and doing these exercises, then this isn't for you. If you have a long term issue with overeating or not particularly active, Noom will make you think why that is, help you understand your thinking, and then guide you towards a happier and healthier person.
Bottom Line: Yes, I would recommend this to a friend