The intermittent fasting tracker that shows the biology happening inside you in real time: Fed, Lipolysis, Ketosis, Autophagy. Ad free fasting app. No account required.
Most fasting apps give you a countdown clock and a streak to protect. Intermittent does something different. It shows you exactly which biological phase your body is in right now, and explains the science behind it with cited primary sources, not marketing copy. If you have ever wondered how to track fasting properly, or what is actually happening during a fast, this is the fasting tracker built for that question.
WHY FASTING WORKS
Intermittent fasting works because of what happens between meals, not just the absence of food. As your fast progresses, your body moves through distinct phases: burning through glucose reserves, shifting into fat burning lipolysis, entering ketosis, and eventually triggering autophagy, the cellular repair process linked to longevity and metabolic health. Understanding these transitions is what separates intentional fasting from guesswork. Intermittent maps every stage so your goals are grounded in biology, not motivation.
KEY FEATURES
PHASE AWARE FASTING TIMER
A real time timer that tracks six biological phases: Fed, Early Fasting, Lipolysis, Ketosis, Autophagy, and Deep Fast. Each phase links to a free science article with primary sources cited.
EVERY FASTING PROTOCOL, ONE APP
Supports 12:12, 14:10, 16:8, 18:6, 20:4, OMAD (One Meal A Day), 36 hour, 48 hour, and 72 hour fasts.
FREE FASTING SCIENCE LIBRARY
A full library of fasting articles covering intermittent fasting, ketosis, autophagy, insulin response, and more. No subscription. No account. No paywall.
SMART HYDRATION TARGET
A science backed hydration goal that adapts to your weight, sex, age, and fasting duration.
WEIGHT AND PROGRESS TRACKING
Log your weight after each fast and track trends over time. Includes streak heatmap, phase reach history, and estimated fat vs glucose energy usage.
PRIVATE CIRCLE AND END OF FAST REFLECTION
Share your fast with a small private group. Applause only responses. No comparison. No gamification.
HOME SCREEN WIDGET AND CROSS DEVICE SYNC
Keep your fasting timer visible with a home screen widget. Your data syncs across devices privately without third party trackers.
WHO IT IS FOR
Intermittent is built for adults who want to understand fasting, not be coached through it. If you follow research on metabolic health, read about longevity, or want a fasting routine grounded in biology rather than points or streaks, this app is for you. Suitable for both beginners and experienced fasters.
HOW IT WORKS
Choose your fasting protocol, from 12:12 to extended fasts
Start your timer and track your biological phase in real time
Tap any phase to read the science and log your reflection at the end
No account required to start. No subscription required to access the library.
Big fan of this app. Very clean and simple layout. No ads or clutter. All insights and information are backed by real research that encourages you to not just take what the app is saying at face value.Haven’t run into any bugs. Simply put, the app does what it says, and says what it does. Exactly what I needed.
Developer Response
Thank you for the fantastic review! We're glad you appreciate the clean design, ad-free experience, and research-backed approach. Making fasting science accessible and transparent has always been a core goal. It's wonderful to hear Intermittent is exactly what you were looking for.
Love the creator of the app
Jwhni
I’ve never written a review on here before yet this app was worth writing for this app is absolutely amazing and the creator thankful for the post of reddit and being able to find this and use it.
Developer Response
Thank you so much for taking the time to leave your very first review—it truly means a lot. We're honored that you found Intermittent through Reddit and that it's been such a positive experience. Your support and kind words are incredibly motivating. Thank you for being part of the journey!
Clean, Educational, Perfect
IDANIELAI
Came from reddit & I am so happy -it’s unbelievable. When an app is made for the people, by the people, you know. Where, off the app, can we support?
Developer Response
Thank you so much for the kind words! It means a lot to hear that. The best ways to support us right now are to continue using the app, share it with others who fast, and share your fasting journey in our Circle community. Community support is what helps Intermittent grow. We're grateful to have you with us! ❤️
Easy, clean tracker
User2573
The app is easy to use, clean interface, and gentle education / prompts (if you so choose). Developer is responsive to feedback.
Developer Response
Thank you for the kind words! We're glad you're enjoying the clean design and educational approach. We believe fasting tools should be helpful without being overwhelming. We also greatly appreciate feedback from our community—it helps make Intermittent better with every update.
Fixed: The app no longer opens in the wrong language on some devices.
Version 1.4.1
The developer, Rohit Kumar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Rohit Kumar
Size
39.6 MB
Category
Health & Fitness
Compatibility
Requires iOS 13.0 or later.
iPhone Requires iOS 13.0 or later.
iPad Requires iPadOS 13.0 or later.
iPod touch Requires iOS 13.0 or later.
Mac Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
