Join the #1 Fasting & Protein App
Zero is the leading fasting and nutrition app designed to help you lose fat, protect muscle, and build healthy habits.
Master your fasting
Fasting is at the heart of Zero. Start a fast with a single tap and track your progress in real time with a timer designed to keep you focused and consistent. Over time, Zero surfaces personalized insights based on your patterns, helping you understand what’s working and where small adjustments can make a meaningful difference.
Whether you are new to fasting or refining an established routine, Zero helps you stay consistent without overthinking it.
Zero makes meal tracking simple and smart. Snap a photo or type in a description to understand what’s actually on your plate. Meals are broken down with protein front and center, plus personalized guidance to help you stay on track toward your daily goal.
No food scales. No macro math. No logging fatigue.
Your personalized Protein Score
Our simple solution takes the guesswork out of getting enough protein. The Protein Score balances your daily calorie needs with the ideal amount of protein for your body. It gives you one clear number to help you dial in protein intake without overeating, even within a shorter eating window.
As you log meals, your score updates and you receive simple guidance on what to focus on next. Think of your Protein Score as a daily north star — a simple, powerful guide as you fuel your body.
Track your water intake
One of the simplest habits, hydration has an outsized impact on energy, appetite, and fasting success. Zero gives you a personalized daily water goal and simple visual tracking with just a tap.
Over time, hydration becomes a habit that supports both your fasting and your eating windows. Staying hydrated also helps reduce cravings and supports appetite control throughout the day.
Trusted by people building healthier habits
Fantastic app!
Very well designed, with great tools for motivation (like streak tracking, badges, etc.) and education (like numerous articles). The fasting Timer and notifications are great.
Christine
Easy to log and track my goals
Best investment which helped me get my weight down. Live a healthy life and fast to improve my focus, energy, and mood. I eat a lot healthier and have lost 50 pounds.
Aditi
Zero helped me lose 100lbs!
I cannot thank the Zero team enough for creating this well-polished app. Zero, along with a healthy ketogenic diet, helped me lose over 100 lbs — and still going strong!
Rick
Super easy to use
Simple and easy to use. Don’t have to get lost on metrics. It’s helped me control late-night binging. Love the fact that you can end your fast from the watch.
Daniel
Really helpful and easy to use
I love this app. It is really worth every penny. I am moving forward on my health goals, and I am more informed now than ever about fasting and getting results. I love it!
Jordan
The best I've ever felt
I’ve never felt more focused, more energetic, more calm, and more patient with people. All it takes is making the decision to do and feel your best, hit that button, and get Zero.
Ruby
The most used and best app I have on my phone
Zero is the best app that I have on my phone. It’s helped me so much with my weight and fitness goals — truly a life-changing app. Thank you so much!
David
Awesome app
I love Zero. Deceptively simple to use, with complex science solidly backing it. This has become a lifestyle choice for both my wife and I — and we are loving the health benefits from it already.
Jenna
Download and start your free trial today.
