The Fast 800

In-app purchases
706 reviews
Content rating
PEGI 3
50K+
Downloads
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About this app

The Fast 800 is a personalised trainer and nutritionist, ready when you are, to support long-term weight loss and better health.

Developed by Dr Michael Mosley and independently validated by healthcare advisors, over 180,000 members have found success with our easy-to-stick-to programme.

With its personalised plans using science-based methods, The Fast 800 has helped thousands achieve their goals with intermittent fasting and the highly acclaimed Mediterranean-style diet. Our Programme is the easiest, most convenient way to learn how to improve your health, with the tools to help you do it and real, delicious recipes to ensure you enjoy it.

The Fast 800 is all you need to keep yourself accountable and start improving your health in a sustainable, delicious way. Via the app, you have access to:

- 18 healthy, nutritionally balanced meal plans
- Options for keto, vegetarian and 5:2
- A library of 1000+ delicious recipes
- Daily guided workouts
- Low-impact to advanced exercise
- Resistance and HIIT training guides
- Pilates, yoga and stretching library
- Mindfulness guides and audio meditations
- Health Coach and Community support

While many people join The Fast 800 to lose weight, and lose more than 6kg in 12 weeks on average, the goal of the programme is actually to improve your health. As it so happens, weight loss is a consequence of that.

Over the years, members have seen significant improvements to their health, from reversing type 2 diabetes, to improving blood pressure and reducing the amount of medication they take.

At 54 years old, Helen, lost an astounding 21kg with The Fast 800 Programme. Helen was previously dealing with thyroid issues, fatigue and pain in her knees and hips. Since joining the programme, she's left that life behind and now lives pain-free.

“Over 13 weeks, I lost 21kg, which was a huge emotional journey. I've successfully reached the weight I was 25 years ago. Before I started The Fast 800 Programme, I was overweight and lethargic. I had issues with my thyroid and pain in my hips and knees (so much so, it was painful to walk). I had no self-discipline when it came to eating and I knew it was time to do something about my health.”

Finding better health shouldn't leave you feeling tired and hungry. Start your personalised programme and finally find what works for you.

Join today and have your meal plan and shopping list in minutes!

Consult your healthcare professional before beginning any diet or fitness regime. Any advice given is general in nature and not meant as a substitute for care by your usual health professional. For any further questions, please email us at info@thefast800.com

FAQs: https://thefast800.com/frequently-asked-questions/
Privacy policy: https://thefast800.com/privacy-policy/
Ts&Cs: https://thefast800.com/programme-terms-conditions/ and our Medical disclaimer: https://thefast800.com/medical-disclaimer/
Dr Michael Mosley’s programme for long-term weight loss and better health.
Updated on
21 Jul 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App activity
  • This app may collect these data types
    Personal info, Financial info and 4 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

656 reviews
Sarah Eggington
03 June 2024
Great for calorie and macro tracking and the shopping list function is very useful. It is a bit clunky to use when batch cooking and therefore not needing ingredients on the shopping list etc. The user interface is mostly fine once you get used to it, but it could do with modernising. The Advanced training sessions are way too easy if you're already well into your fitness, so I don't use that function at all and just write my own. I've not used the support channel or information sections.
6 people found this review helpful
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Sarah Gilman
09 October 2023
The Mediterranean way of eating is great and that's not something I want to change. Haven't really been impressed with the app and as I'd previously used my phone to log in, it's not really much different to using my login through Chrome. They're are quite a few things I'd like to see to make it more efficient. Here's one, as I've not enough space: an option to keep the app open when using recipes (it's a pain when your hands are full of garlic etc and you've got to unlock your phone).
11 people found this review helpful
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Paula Cope
06 July 2024
Really easy to follow and the recipes are delicious. I am eating a whole range of things that I would never have tried. I love it and highly recommend trying this plan. I love that you are advised of your meals but have the choice to swap them if you don't like the meal options. The exercises are fun and varied and I wish I started this plan earlier.
21 people found this review helpful
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What's new

Performance updates and bug fixes