I've lost weight with Noom too. It has the usual things like tracking food you eat and weight but more importantly, it has a strong psychological component to address why you eat. It doesn't shame you into never eating pizza or chocolate, it reframes your relationship with food. I'm not sure if it is setting things up for long term success but it does work in the short term. It focuses a lot on foods that contain a high percentage of water which makes them less calorie dense.
I found a ton of long term success just by making good meal habits.
Typical day for me: yogurt breakfast about 100 calories, egg sandwich or low cal tortilla quesadilla lunch about 400 calories, going into dinner with 500 calories consumed means you can really eat a big dinner or have beer or whatever
