Free ($59/month for premium)
When researchers analyzed the use of phone apps for weight loss and maintenance in 2016, they based their research on Noom (then known as Noom Coach). Of the 35,921 participants, roughly 76% of women and 84% of men lost weight while using the app, and nearly 23% experienced more than 10% of their body weight.
The free version works like most others: Enter your goals and weight and the app sets you up with a plan based around caloric intake. To stay on track, you’ll record your intake and exercise manually, though an activity monitor tracks steps and you can link up to apps like Google Fit and wearables like Fitbit. Opt for the premium version and you’ll get a health coach who checks in on you, a support group (think: the dieter’s version of social media), and a course in healthy weight loss, diabetes prevention, and avoiding hypertension.