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.

Trustpilot score

Trustpilot is a platform where consumers can leave reviews and scores reflect overall customer satisfcation.

SW Noom® Second Nature
Star rating 3 stars 4 stars 5 stars
Score 2.8 / 5
read reviews
4.2 / 5
read reviews
4.9 / 5
read reviews

Trustpilot logo

Signing up

SW Noom® Second Nature
Free trial
(limited access trial period for £1)
Clear breakdown of costs
Clear cancellation policy
Length of programme All plans ongoing. Core: 4 months

Part 2: ongoing.

Core: 3 months.

Sustain (optional): ongoing.

Easy to cancel
(If cancelling within 14-day trial, otherwise you have to call customer support)
Refund policy Partial refund if cancelled within 14 days (dependent on the number of days since purchasing the programme). Full refund (apart from £1 admin fee) if cancelled within 14 days. After this point, any charges non-refundable. Full refund if cancelled within 14 days. After this point, any charges non-refundable.
Refer-a-friend scheme
(not for customers in the UK)
Easy to include family


SW Noom® Second Nature
Dietary approach Low fat Low fat Lower carb
Caters to vegetarian
Caters to vegan


SW Noom® Second Nature
Tailors the plan around diabetes
Tailors the plan around other health issues
Face-to-face meetings
(if meeting plan chosen)
Access to registered dietitian or nutritionist
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 and activity tracker 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 over 3, 6, and 12 months (as of June 2019). 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 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.

Noom® also provides this feature, however, on the Second Nature programme your personal coach is a registered dietitian or nutritionist, rather than a customer service representative (Slimming World®) or an individual from any health-related background (Noom®).

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
Registered dietitian or nutritionist coach
The same, personal coach throughout the programme
3 months £20/month £47/month £35/month £300/month
6 months £20/month £47/month £23/month £300/month
12 months £20/month £47/month £16/month £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.

Get your free 5 day plan today

Write a response

Gail Thompson
8 January, 2020

If you were to opt for the Slimming World® face-to-face group meeting plan it would work out to be more expensive.
This is actually incorrect….there’s a joining fee of £9.95 but voucher offers are often available, the weekly group meetings are £4.95, if you book 10 you get 2 free and its completely free once you hit your target weight.

Tamara Willner
10 January, 2020

Hi Gail, thanks for your query. Slimming World does offer discounts, as do Noom and Second Nature. The discounts on all the programmes fluctuate throughout the year, so we only included the base normal rates to make a fair comparison. At the normal rate for Slimming World face-to-face meetings, you would be paying £69.40 in total for 3 months, which is more expensive than the Slimming World digital plan, Noom, and Second Nature.