I signed up to an 8 week challenge and its one of the worst Apps that I have used. You can not filter or deselect ingredients when selecting meal plans. This is important when it comes to allergies. Other similar programs allow you to select your allergies so that it never recommends meals with those ingredients. There are the same work outs to choose from each day which gets boring. The images of the meals rarely load and when they do they are blurry and zoomed in so that you cant see the entire meal. The app is very slow especially when swapping meals (and yes I have full 5G or WIFI). The only thing challenging about this program is the tech and user experience.