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Weight Loss Programmes

Noom® vs Slimming World®


Weight loss programmes can provide a helpful structure for your health journey when you feel out of control with unhealthy habits. They can also be a great way to join individuals going on the same journey, which can be incredibly motivating.

Everyone is different, and there is not a one-size-fits-all approach to choosing a weight loss programme. It ultimately depends on what suits your individual needs and what fits into your lifestyle. When it comes to losing weight, some people want rigid rules and a quick fix, whereas others like more flexibility and a long-term lifestyle change.

To save you tiresome research and help to answer some important questions, this guide compares two popular weight loss programmes; Noom® and Slimming World® (SW). Noom is an online app-based programme, whereas you can choose between online and face-to-face plans with Slimming World.

Comparisons to the Second Nature programme are included. Second Nature is a 3-month online programme that helps you to lose weight and make sustainable lifestyle changes.

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SW Noom Second Nature
Star rating 3 stars 4 stars 5 stars
Score 2.4 / 5
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4.4 / 5
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4.7 / 5
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Signing up

SW Noom Second Nature
Pay what you like for the first 2 weeks
Clear breakdown of costs
Clear cancellation policy
Length of programme All plans ongoing Dependent on your goals Ongoing subscription
Easy to cancel
(If cancelling within 14-day trial, otherwise you have to call customer support)
Refer-a-friend scheme
(not for customers in the UK)
Easy to include family

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SW Noom Second Nature
Dietary approach Low calorie, low fat Low fat Whole foods, lower carb*
Caters to vegetarian
Caters to vegan

*For examples of recipes on the Second Nature programme, see here.


SW Noom Second Nature
Tailors the plan around diabetes
Tailors the plan around other health issues
Face-to-face meetings
(if meeting plan chosen)
Private chat with a registered dietitian or nutritionist
Developed by dietitians, nutritionists, and health psychologists
Weekend support available

Programme features

SW Noom Second Nature
Encourages daily weigh-ins
(2 apps, 1 for planning and 1 online access)
Award/prize system
Recipe videos
(Free recipe videos available on YouTube without signing up)
Exercise videos
Weighing scales provided
(on tech plan)
Tracks sleep
Tracks steps
Education of nutrition science
Counting/point system
(Free Foods®, Healthy Extras®, and Syns®)

(calories represented by traffic light system)
Food diary feature


When programmes provide price plans in different formats, it can be hard to accurately compare prices. To make this easier, we have calculated the price of monthly digital basic price plans on each programme to show you how costs compare (as of April 2022). All admin fees are included in these prices.

For basic monthly plans, Noom is the most expensive option. On the surface, Second Nature seems slightly more expensive than Slimming World. However, You also have the same coach throughout the whole Second Nature programme that you can build a relationship with, rather than an ad-hoc response from a different coach each time (Slimming World) or getting support from your group leader who is typically a past member with no nutrition training.

With Second Nature, you’ll have one-to-one private support from a registered dietitian or nutritionist. Ask questions, get advice on your meal plan, and tailor the plan to your lifestyle. Registration to a professional body requires a nationally recognised nutrition or dietetics degree. With Noom, you’ll also have a health coach. However, Noom coaches are not registered dietitians or nutritionists and instead have a Health Coach Certification offered by the ‘Noomiversity’, which has been approved by the National Board for Health and Wellness Coaches (NBHWC).

Registration to a professional body requires a nationally recognised nutrition or dietetics degree. Weekly face-to-face sessions with a registered dietitian or nutritionist can be very expensive (£40-£100/hour). We have added a column representing this to compare costs (Weekly Nutritionist – WN).

Monthly (basic) digital subscriptions:

SW Noom Second Nature WN
Private chat with a registered dietitian or nutritionist
The same, personal coach throughout the programme
Price £20/month £47/month $60 /span> £300/month

If you were to opt for the Slimming World face-to-face group meeting plan it would work out to be more expensive.

Example nutrition query response

Nutrition is a major part of any weight loss journey. Therefore, it is important to receive accurate and reliable nutrition advice surrounding nutrition. We asked each programme a common nutrition-related query to see how the information provided as an answer compares.

Q: Are eggs bad for your cholesterol? Should I avoid them?

Slimming World’s answer:

“I’m not trained in medical queries I’m afraid, this would be something to ask your Health Care team.”

Noom’s answer:

“No single food will stop or start weight loss. It’s all about balance! I suggest consulting with your doctor regarding specific needs (i.e. cholesterol).”

Second Nature’s answer:

“Eggs are a rich source of dietary cholesterol. It was previously thought that cholesterol-containing foods increase blood cholesterol and the risk of heart disease and strokes. However, this has not been shown to be the case as dietary cholesterol is poorly absorbed from the digestive system, and if cholesterol is absorbed, the body will produce less of it to balance out (and prevent blood cholesterol levels rising). Therefore, you do not need to be restricted unless recommended to do so from your GP/Healthcare professional. Eggs are among the most nutritious foods on the planet providing good quality protein as well as being loaded with vitamins and minerals.”

Take home message

  • When choosing a weight loss programme, it is important to consider what would fit into your lifestyle and help you achieve your goals.
  • Noom and Second Nature are both online and app-based programmes, whereas Slimming World has an optional face-to-face meeting plan.
  • Slimming World seems to focus on diet, whereas Noom and Second Nature approach weight loss by focusing on behaviour change as well as eating habits.
  • Noom is the most expensive programme on a monthly price plan basis.
  • Second Nature is the only programme where you get a registered dietitian or nutritionist personal health coach.
  • Noom and Slimming World have clear guides of foods to eat or avoid, which can be helpful for some but might not benefit those with an unhealthy relationship with food.
  • Second Nature provides you with an education of nutrition science, allowing you to make informed decisions yourself and develop a healthy relationship with food in the long-term.
  • Second Nature answers nutrition queries with the most up to date science.

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Write a response

Mary Cullen
15 May, 2021

I would like to try 5 day free plan

2 June, 2021

Hi Mary, thanks for your interest in the programme! Please email to request our 5-day plan 🙂 To find out more about the programme, you can take our health quiz here

Suzanne Fahey
15 May, 2021

I’m 62 healthy and moderately active working part time

2 June, 2021

Hi Suzanne, thanks for your comment! The Second Nature programme might be a great fit – to find out more about the programme, please take our health quiz here

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