Lumen - Metabolic Coach

4.2
3.38K reviews
Content rating
Everyone
100K+
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Everyone
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About this app

Do you want to take control of your metabolism, lose weight, and live a healthier lifestyle?
With Lumen’s personalized metabolic coach, you can!

Lumen is the world’s first device to measure whether your body is burning fats or carbs - in a single breath. Say goodbye to guessing and hello to real-time metabolic insights, tailored daily nutrition plans, and recommendations on what to eat and when.

With direct access to your metabolism at your fingertips, our features will guide you to speeding up your metabolism, keep you motivated to reach your health goals, and feel your best self.

EVERYTHING YOU NEED TO HACK YOUR METABOLISM

Features include:
* Real-time metabolic insights to guide you on your journey
* Personalized daily nutrition plans
* Lifestyle recommendations for sleep, exercise, fasting, and more
* Customizable tracks to achieve your goals
* Healthy habit building
* Progress tracker
* Monthly cycle tracker
* An engaged community for support and discussions


This app integrates with Health apps to sync data on your activity and sleep.


SUITABLE PLANS FOR EVERYBODY


At Lumen, we believe in a personalized approach to health. That's why we offer different plans designed to fit your unique goals, whether it's weight loss, fitness performance, or improving your metabolic health. With our progress tracker and healthy habit influences, you'll have the support you need to succeed.




WORKING ON YOUR WEIGHT LOSS JOURNEY


By macro-tracking your meals, you can continue enjoying the meals you love with a new outlook and healthier relationship with food and yourself!


PERSONALIZED NUTRITIONAL PLANS & MEAL PLANNING


Lumen tracks your metabolism, but it’s also a powerful tool for managing your journey in nutrition, fitness, and overall well-being. The app includes interactive features to help you stay on track with your nutrition goals, such as meal planning and recipe suggestions.



FUELING UP PRE AND POST WORKOUTS

Don't let energy levels hold you back from your workout goals. Lumen gives you real-time insights into your body's fuel usage, so you'll know exactly when to hit the gym and when to rest. Lumen levels will guide you on whether you have enough energy or need to fuel up before your workouts.

SCIENTIFICALLY-BACKED


If you like talking science - we’ve been featured in peer-reviewed articles and building research ourselves. Lumen's technology has been scientifically proven to accurately measure metabolic fuel usage when compared to the gold standard (RER) for measuring metabolism in multiple validation studies.


PREMIUM CONTENT


Improve your knowledge with our informative library of videos from fitness experts, coaches, and nutritionists.


MOTIVATION


Every breath measurement will tell you what’s happening in your body. These insights help you maintain your motivation and give you guidance on how to hit your goals.

So, what are you waiting for? Download Lumen today and start your journey to a healthier, happier you! You'll have the support and guidance you need to take control of your metabolism and live your best life.


Lumen has been featured in Forbes, BBC News, TechCrunch,Entrepreneur.com, Wired Magazine, Shape Magazine, and more

Winner of the CES 2019 Best Reviews Award | Listed in the Top 30 Best Devices CES 2019 | Esquire 2020 product award

Please note:
You must have a Lumen device to use this app. You can order your device from www.lumen.me
While Lumen is not intended as a medical device, it is recommended to consult your doctor before starting any nutrition plan.

Interested in partnering with us? Get in touch with us www.lumen.me/partners

Join us and begin your Lumen journey today!
Updated on
Jul 1, 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 info and performance
This app may collect these data types
Personal info, Health and fitness and 4 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
3.3K reviews
JuanCarlos Motamayor
June 16, 2026
The device is useless, very little science behind and they have a system of creating sneaky undetectable subscriptions that cost the same than the device. I used it twice and ended up spending over $1000 because the fraudulent subscriptions. Just for clarification they charged me $349 per year for several years while their advertised price is less than $200 plus their website does not allow cancellation and to cancel in the app there is not a clear option to cancel, you have to chat with a bot.
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Lumen.me
June 15, 2026
We're sorry to hear of your experience, Juan! To clarify, our membership terms are not hidden, as they are disclosed during checkout, FAQ, and Terms of Use. You can also manage your membership within the app. Please reach out to our support team through the in-app chat, and we'll review your account and help ensure your membership is canceled.
Brandon Clements
June 26, 2026
Device will not update firmware will not allow use without firmware update waste of money. Firmware update should be optional. edit I was able to get it working on my own after a few hours of trouble shooting so I'm bumping this from 1 to 3. i still think the onboarding could use some work. Such as proving some troubleshooting directly on screen. Focused too much on ultra clean UI instead of functionality.
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Lumen.me
June 26, 2026
Thank you for your review, and we do apologize for this experience, Brandon! Please contact our support team through the in-app chat or by emailing support@lumen.me, and they’ll be happy to help assist you with updating your firmware.
Jose Arroyo
October 20, 2024
Barely adequate. The meal tracking leaves a lot to be desired. It doesn't recognize some barcodes except for what's already in their system. If you make a mistake saving meal portions it has to be deleated and re-entered. The My Foods can't be edited/ deleted and the same foods keep being added to it. This app is very tedious, the only thing that works is the breath analyzer. I'm going to start using Lose-it for my meals. Why aren't there any smart scales that can connect to this?
9 people found this review helpful
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What’s new

Thanks for using Lumen! This update includes new features to keep you on track with your Lumen goals.
Content rating
Everyone
Users Interact
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App support

About the developer
META FLOW LTD
support@lumen.me
30 Haarbaa TEL AVIV-JAFFA, 6473926 Israel
+972 55-502-5508