One weight loss app, 20+ years of expertise
Real weight loss starts here. Get started with the SemaPen weight loss app and unlock trusted weight loss programmes guided by UK obesity experts.
- Average 21% weight loss¹
- Trusted programmes built by UK experts
- Personalised advice and support
- Smart weight loss app to track progress and learn positive habits
Your journey starts in the app
Unlock tailored support, weight tracking and more.
1
Download the free app
2
Take your digital consultation
3
Start your programme
Scale included
As a SemaPen subscriber, you'll receive a sleek Withings® smart scale worth £60.
It's simpler with SemaPen
There's no two ways about it. Weight loss is difficult – especially when you try to do it alone.
But with SemaPen, it's simpler than ever.
Built by UK obesity experts, SemaPen combines trusted weight loss programmes with specialised support tailored to you. It's because we know the right support can be the difference that makes lifelong weight loss possible.
With our experts on your side, success could be closer than you think. On average, SemaPen subscribers lose around 21% of their starting weight.¹
Motivation is only a click away
When you join SemaPen, you join a weight loss community led by UK obesity experts. As part of Phoenix Health, we've helped people lose weight safely and successfully for more than 20 years.
Weight loss stalled? Let us know, and we'll offer tailored guidance to get you back on track. Got something to celebrate? Share your success on our forum* and watch the 'congrats!' roll in. With our community on your side, you'll never feel like you're navigating this journey alone.
What's so special about the SemaPen weight loss app?
There are so many health apps out there that do one or two things well. A little calorie and nutrition logging here. A bit of fitness tracking there.
But why switch when one app can do it all? At SemaPen, we've created an app for tracking weight loss that has everything you need to lose weight and feel healthier. For good.
Your new favourite features
Comprehensive health dashboard
Included in all plans
Like watching the pounds ticking down on your scale? You'll love tracking your weight and health in your one-stop dashboard. It's your place to keep tabs on your:
- Weight loss progress
- Treatment schedule
- Appointment schedule
- Mental health
- Side effects
The SemaPen Academy
Included in all plans
Lifelong weight loss starts with healthy habits. That's why we've set up the SemaPen Academy. It's a weight loss coaching app and fun challenge in one. Learn nutrition and health hacks, take mini quizzes and earn badges as you go.
Personalised fitness programme
Included in Gold and Platinum plans
Regular exercise not only supports weight loss, but it also comes with a raft of health benefits. That's why we've partnered with Sword Health to offer personalised online fitness support to our subscribers.
You'll join a 10-month programme led by a dedicated physiotherapist and powered by a smart fitness band. Just what you need to stay active and build muscle tone as you smash your weight loss goals.
Comprehensive health check
Included in Gold and Platinum plans
At SemaPen, we care about your whole health – not just your weight. After all, knowing your risks is the first step to living a healthier, more fulfilled lifestyle.
That's where our home blood tests can help. We send a nurse to your home to take blood samples and report back with a comprehensive health review. Equipped with this vital data, you can build an action plan with support from your SemaPen team.
Our Gold plan includes a home blood test for common health problems. Our Platinum plan includes an advanced blood test that also analyses vitamin and nutrient levels, plus a holistic health assessment at your home or workplace.
Expert video appointments
Included in Gold and Platinum plans
That's right – you can talk to our dietitians or psychologists online to get expert, in-depth advice tailored to you. Simply book a video consultation through the app on a date to suit you.
Dietitian consultations are included in our Gold and Platinum plans. A psychologist consultation is included in the Platinum plan.
Community weight loss forum
Coming soon
Weight loss is more fun with friends. Using the SemaPen app, you can connect with others on their weight loss journey through our community forum. Post questions. Create group chats. And share your wins – however big or small.
Nutrition tracker and barcode scanner
Coming soon
Keeping a food diary can be a great weight loss aid. It helps you be more mindful about your diet and spot unhelpful patterns.
That's where our nutrition tracker comes in. With built-in calorie counting and macronutrient tracking, it's easy to see if you're accidentally overeating at lunch or lacking protein at breakfast.
Stay tuned for our barcode scanner, too. It will make tracking calories and nutrients even easier – especially when you're out and about.
There's a SemaPen programme for everyone
Everyone loses weight differently. What works for one person won't work for everyone.
That's why we've preloaded our app with three tailored weight loss programmes. Built by UK obesity experts, they're designed to give everyone the best chance at losing weight safely and sustainably.
Get started in four simple steps
We want to make starting your weight loss journey as easy as possible. Now, with the SemaPen app, it's simpler than ever to access the expert support you need. Here's how it goes:
1. Download the SemaPen app
2. Enter your details and answer some questions about your medical history
3. See your programme recommendations and choose the right fit for you
4. Start losing weight and living healthier with support from our experts
A medical weight loss plan supported by experts
Discover what obesity treatment professionals have to say.
David Kerrigan has provided expert commentary on obesity for
You've got 20+ years of obesity treatment expertise on your side
SemaPen is part of Phoenix Health: the only private bariatric provider trusted to provide NHS treatment.
SemaPen is not a pharmacy or an online-only doctor – we're so much more than that. As part of Phoenix Health, we've spent the last 20+ years providing expert medical treatment for obesity.
And now, we've consolidated all we know into one advanced weight loss app and three expert-led programmes. It's all about giving you the support you need to reach your target weight faster and live better.
The SemaPen money-back guarantee
Get results – or get your money back.**
We have total confidence in our weight loss tracker app and treatment programmes. And we want you to feel the same.
That's why we offer a money-back guarantee.
It's simple. If you don't lose
at least 5% of your body weight after completing your SemaPen treatment, we'll give you a refund.**
The benefits of weight loss
Did you know that nearly 26% of adults in England are living with obesity?²
If a person is living with obesity, it means they have a body mass index (BMI) of 30 or more. Your BMI is an estimate of your body fat. It's calculated based on your height and weight.
You're considered to have a healthy weight if your BMI is between 18.5 and 24.9.
The World Health Organisation has called obesity a 'global epidemic'. The number of adults living with obesity worldwide has more than doubled since 1990.³
This is a big problem because obesity can cause all sorts of health issues. If you have obesity, you're more at risk of heart disease, bone disorders, type 2 diabetes and certain types of cancer. Adults with obesity are also more likely to develop depression.
That's why weight loss can be so life-changing. Not only can it improve your overall health, but it can also make you feel happier and more energised.
And you don't have to shed lots of weight to start feeling the benefits. If you lose just 5% of your body weight, you can expect:
- A reduced risk of cancer and type 2 diabetes⁴ ⁵
- Less joint pain and a reduced risk of developing arthritis
- Lower cholesterol, which means less risk of heart disease and strokes
- Decreased blood pressure
- Better sleep
For most people with obesity, losing 5% of their body weight means losing a few pounds. Now imagine what losing 21% of your body weight could do for you.
What would 21% weight loss look like for you?
The problem is that weight loss doesn't come easily to most people. While calorie-controlled diets and exercise are proven treatments for obesity, they need lots of willpower to get right. For many, eating habits are hard to shift – and some people find physical activity more difficult than others.
We want to help change that. If you've been struggling to get the weight loss results you want through navigating diet and exercise alone, our team of experts is here to help.
The SemaPen app features everything you need to help you
lose weight safely and improve your health. You can track progress with a comprehensive health dashboard, check in with SemaPen specialists, develop healthy habits with the SemaPen Academy and so much more.
Read more guides
Obesity treatments: what's available in the UK?
Learn more about the various obesity treatments available in the UK.
Diet and exercise tips
Discover helpful tips for meal planning and exercise while on our programmes.
How non-surgical weight loss treatments work
Explore the science behind SemaPen's custom weight loss programmes.
Ready to get started?
Download our personalised weight loss app and begin your journey today, supported by real UK obesity experts.
Are you considering bariatric surgery?
SemaPen is part of Phoenix Health – one of the UK's leading obesity clinics and the only private bariatric surgery provider trusted to provide NHS treatment.
With clinics across the UK, Phoenix Health helps more than 500 patients each year to lose weight and live a happier, healthier life.
Visit Phoenix Health today and learn what bariatric surgery could do for you.
Contact Details
Room 6, Ground Floor, Electiva Pines Hospital’, 192 Altrincham Road, Manchester, M22 4RZ
Quick Links
Follow Us
1-14474096275
SemaPen Pharmacy
GPhC Registration number
9012927
We only offer our programme in the UK and Northern Ireland. We are currently unable to deliver to the Republic of Ireland.