Combining behavioural science, flexible nutrition guidance, and app-based tracking, it helps its members build habits that last for the long term, not just a few short weeks. Backed by clinical research finding greater improvements in diet quality compared to standard guidance, WW is designed for real people with real lives.
What is Weight Watchers, and how does it work?
Weight Watchers (WW) is a science-backed weight management platform that helps members build sustainable, long-term, healthy habits through flexible nutrition guidance, behavioural coaching and app-based tracking. The WW app makes it easy to track food, activity and habits in real time, with over 4,500 recipes to keep you feeling motivated and inspired.
Rather than prescribing a restricted diet, WW uses a points-based system that gives you the freedom to eat everyday foods while making more balanced choices. Every food and drink is assigned a points value, and you receive a personal daily budget to work with based on your input and needs. Tracking food can make mealtimes quite stressful, but what makes WW more manageable is the 350 ZeroPoint foods that don’t require tracking at all.
Don’t just take Weight Watchers’ word for it – studies have consistently shown that people who track their food intake at least five days a week lose more than twice as much weight as those who don’t (Painter et al., 2017). Exercise matters, too – Johns et al. (2014) found that diet plus exercise leads to greater weight loss at 12 months compared to diet alone, and you can track these exercises and their progress right there in the WW app.
WW also offers programmes tailored to different life stages and circumstances, including support for menopause, diabetes management and a dedicated WW Clinic programme for members using GLP-1 medications.
What is the science behind Weight Watchers?
Weight Watchers isn’t just another wellness trend – there’s solid research behind the way it works.
The programme is built on behavioural science, recognising that lasting weight loss is about building consistent habits and a healthy relationship with food, not white-knuckling your way through intense calorie restriction. WW combines nutritional guidance with behavioural coaching, accountability tools and community support to make that often daunting process feel genuinely achievable.
And, the research speaks for itself: a 2025 randomised controlled trial found that over six months, WW’s behaviour-focused approach delivered 4.7 times greater improvements in diet quality compared to standard nutritional guidance (Palacios et al., 2025).
The community element plays a role, too. Research suggests that having a buddy for your weight loss journey can help you lose more weight than doing it alone (Dailey et al., 2018), and this is easier than ever with WW’s private members-only social network, Connect. The community allows you to post photos and videos of your journey, find and follow other people, take part in challenges and much more, all designed to help you reach your goals.
Importantly, WW acknowledges that weight is shaped by biology and personal circumstances, not just willpower. That’s why tailored support exists for menopause, diabetes and GLP-1 medication users through WW Clinic.
What’s included on the Weight Watchers app and how much does it cost?
Weight Watchers offers three options for its members, depending on their needs: CORE, CORE+ and GLP-1 COMPANION. You can take a quick quiz on the WW website to see which one suits you best.
While some programmes may be more specialised than others, they all provide access to WW’s points programme, inspiring recipes, macro tracking and some of its newer additions, like AI Body Scanner, sleep tracker and weight health score.
The main differences between the programmes are as follows:
| Feature | CORE | CORE+ | GLP-1 COMPANION |
|---|---|---|---|
| Best for | Proven, flexible weight management that fits your life | More support and results, on medication or not | Members using GLP-1 weight-loss medication |
| Points programme | Yes | Yes | Yes |
| Flexible, science-backed nutrition guidance | Yes | Yes | Yes |
| Personalised modes | Yes | Yes | Yes |
| Macro tracking | Yes | Yes | Yes |
| AI body scanner | Yes | Yes | Yes |
| Supportive member community | Yes | Yes | Yes |
| Recipes and everyday tools | Yes | Yes | Yes |
| Coaching and workshops | Two weeks free | Unlimited | Unlimited |
| GLP-1 companion programme | No | Yes | Yes |
| Side effect support and medication tracking | No | Yes | Yes |
| Menopause programme | No | Yes | Yes |
| GLP-1 medication support | No | No | Yes |
| Diabetes programme | Yes | Yes | Yes |
| Breastfeeding programme | Yes | Yes | Yes |
| Sleep tracker | Yes | Yes | Yes |
They’re priced differently too; CORE costs:
- £10 per month when you sign up to a 12-month plan
- £15 per month when you sign up to a 3-month plan
- £20 for one month only
CORE+ and GLP-1 COMPANION cost:
- £14 per month when you sign up to a 12-month plan
- £21 per month when you sign up to a 3-month plan
- £28 for one month only
What are the perks of using Weight Watchers?
Weight Watchers brings together everything you need for lasting change, all in one place. The flexible points system means no foods are off-limits, while the 350 ZeroPoint foods help take the stress out of everyday meals. The app makes tracking food, activity and habits almost effortless, with an AI Body Scanner to measure progress beyond the scale and over 4,500 recipes for inspiration.
The perks of WW are best told by the members themselves. Marios was able to lose weight and still impress with his Greek cooking by swapping bechamel for low-fat yogurt, while Kate found she could enjoy moderation rather than deprivation. The app’s barcode scanner and food tracker make logging meals effortless, and Kate rates it among her favourite tools for staying on track.
Community matters, too – Samantha built a ‘buddy system’ with her partner, turning early workouts and food shopping into shared routines rather than chores. Marios and Shaun found confidence walking into their first Workshop together. Members consistently describe gains beyond the scale; Samantha calls herself “a powerhouse” and Kate says she’s “never felt stronger…physically or mentally”. And you can read more member success stories here.
From everyday flexibility to genuine community support, it’s a programme for more than just weight loss – it transforms how you feel.
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