Quick verdict
- What it is
- Store information collected; independent summary not yet available.
- At a glance
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- Free to download
- In-app purchases
Categories and search queries
Official categories
- Health & Fitness
- Lifestyle
AppCorpus categories
Key functions
| Function | Availability | Access | Scope | Evidence |
|---|---|---|---|---|
| Family Sharing | Yes | Unknown | App Store | Store published |
| Free app | Yes | Free | — | Store published |
| In-app purchases | Yes | Limited free | — | Store published |
Screens
App Store
26 store screenshots
Pricing & paywalls
App Store
Shown for US
- Zero Plus Subscription — $9.99
- Zero Plus Subscription — $69.99
- Zero Plus Subscription — $89.99
Ratings & reviews
App Store
Shown for US
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5/5So sad
I do not write app reviews but I’m compelled to for this app. I used this app for 809 days straight! Lost some weight but more importantly it became a lifestyle that I was happy, healthy and proud of having finally been achieved. I stopped fasting due to a medical problem and after a year I decided to go back to my loyal fasting app. I’m aggravated more than anything but also totally bummed. I like looking at all of the badges I had received, the progress I made and my longest streak in anything I’ve done. I was dedicated. I have been trying to log a fast for over 24hrs. I have deleted and redownloaded the app at least 3x. Now I’m forced to use another app. At least I’ve decided that neither are worth paying for at this point. I was poster child for the success that intermittent fasting can bring and Zero was my buddy and right hand in my success. Now I’m forced to use another app. Won’t be paying for the new app and even if zero did work, I feel like maybe it’s not worth it anymore. Is that the trick, I have to pay for it again for me to even use the basic fasting timer? That’s not right! Before I pay for any app (especially expensive ones like this) I have a strict rule for myself that I must use it for 21 consecutive days. I wouldn’t even consider paying for it unless I’ve put in the 21. And you’d think seeing as I used and paid for it for over a year and after not using and coming back that the developers would possibly offer a welcome back deal…nope! So disappointed!!!
Beckay 😊 · 30 Aug 2026
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5/5Works. 30lbs in 2.5 months
I tried keto, I tried them all. Ended up binging and gaining more back quickly. Found fasting and really knocked out the cravings. With Zero it’s really easy to follow your progress without feeling like you’re staring at a clock waiting to eat again. The articles help ease your mind in the beginning knowing that your hunger pangs and other side effects are common and have reasons. Also how to avoid them and get past the fasting wall. I love the timer and how you can count up or down. I count up because I like seeing how far I can push myself within reason. Counting down makes me want to eat as soon as it hits 0:00. The app has some great tracking features and syncs up with apple health so it takes down the data from my smart scale. Nice knowing that I don’t have to manually enter everything every time. A welcomed improvement would be a way to change the theme of the app to keep it fresh or personalized. Different colors etc. this is a small ask for me. Overall I love the app and have lost 30lbs, 6%body fat in 2.5 months. Tbh I haven’t exercised much at all. Just having my body do what it does and use the energy I’ve stored away for years. But now losing the weight of nearly two full size dyson vacuums, I have more energy both mentally and physically that I now crave to get out and do more
reviewer0102030405 · 30 Aug 2026
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5/5Updated: Room for Improvement
21 Nov Update: The developers reached out to me from my initial review and were super helpful and were able to walk me through how to better navigate the app. My lack of understanding how to fully use all the features is why I struggled to change fast settings without saving it as a preset. Due to their amazing response, explanations and helping me fix my complaints deserves 5 stars. It’s definitely worth the subscription and has earned 5 stars in my book.👌🏾 I can recommend this app 100% ⭐️⭐️⭐️⭐️⭐️ ————————————————————— It’s ok, I love the majority of the features. & unfortunately I forgot to cancel after my free trial. But it’s not worth $70/year. I don’t understand why there isn’t an option to shift or plug in a fast without having to make it a preset. Life happens and I sometimes do an odd hour fast just to get back on track. But that doesn’t mean I want it to be saved as a preset. You should have the option to just put in a fast without being forced to save it as a template. They’re typically one off fasts. The lack of flexibility there is annoying. It’s also odd that it’s not an option under the premium section. If I’m paying to track my fasts it should be a bit more flexible for the price we’re paying. I’ll look for another app that has this simple feature. It’s great aside from that.
Mattiekinsss · 30 Aug 2026
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5/5Literally life changing!
This app has been literally life changing! I accidentally stumbled upon it, just wanted something SIMPLE to log my fasting hours when I first started learning about intermittent fasting but it has sparked my interest in all things related to fasting and health. Im not able to afford paid version and Im extremely grateful that the free version has enough basic information and tracking features to inspire change and at least plant that seed to help people want to learn more, and to want to live with more insight, regardless of economic situation. I was that moron.. the one watching with suspicion while wolfing down pizzas, thought people fasting were just weird food hating extremists. This app has been a revelation, and has been instrumental in opening the door to a new world to me so to speak. It has been invaluable in changing my attitude towards food, fasting, meditation. If you have the means to buy the paid version do it, it will be a small investment for what you get. For me sadly the the price point for the paid version for this and the podcast is not doable but the free version can be very eye opening. Dont just log fasts like I did at first. Dive in and discover everything on the app thats available for free and listen to the podcasts. Fasting and tracking my glucose is now my normal way of life. Grateful.
Msatx · 30 Aug 2026
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4/5App forcing me to pay for premium
I loved this app and found myself using it for over a month. The mechanics are simple and it’s a great way for me to keep track of my fasting! However, recently it began trying to force me to subscribe to premium. Every time I open the app, a pop up comes onto the screen and tries to force me to subscribe to premium. There is no way to get off this screen and access my fasting timer again unless I actually subscribe to the premium feature. Whether I update the app or restart it, it stays stuck on this subscription page. It’s very frustrating that now, an app that was meant to be free with optional paid features, is forcing me to pay to access features that were previously free for me. I really want to continue using the app but I’m so frustrated that I’m considering deleting it. Update: the app just sent me a notification claiming my access was “unlocked” for me to use the app for free again without premium. Once I opened the app the pop up appeared again but this time with an “x” on the top right corner. While I will give this app an extra star because the problem is fixed, I still don’t find it fully enjoyable to use an app that temporarily forces you to pay them despite marketing themselves as a free app with “in-app purchases” which are optional.
Miaosore · 30 Aug 2026
Privacy & accessibility
App Store
Privacy
- Data Linked to You — Analytics — Diagnostics — Other Diagnostic Data Developer declared
- Data Linked to You — Analytics — Diagnostics — Performance Data Developer declared
- Data Linked to You — Analytics — Health & Fitness — Fitness Developer declared
- Data Linked to You — Analytics — Health & Fitness — Health Developer declared
- Data Linked to You — Analytics — Identifiers — User ID Developer declared
- Data Linked to You — Analytics — Usage Data — Product Interaction Developer declared
- Data Linked to You — App Functionality — Contact Info — Email Address Developer declared
- Data Linked to You — App Functionality — Contact Info — Name Developer declared
- Data Linked to You — App Functionality — Diagnostics — Crash Data Developer declared
- Data Linked to You — App Functionality — Diagnostics — Other Diagnostic Data Developer declared
- Data Linked to You — App Functionality — Diagnostics — Performance Data Developer declared
- Data Linked to You — App Functionality — Identifiers — User ID Developer declared
- Data Linked to You — App Functionality — Usage Data — Product Interaction Developer declared
- Data Linked to You — Product Personalization — Contact Info — Name Developer declared
- Data Linked to You — Product Personalization — Diagnostics — Other Diagnostic Data Developer declared
- Data Linked to You — Product Personalization — Health & Fitness — Fitness Developer declared
- Data Linked to You — Product Personalization — Health & Fitness — Health Developer declared
- Data Linked to You — Product Personalization — Identifiers — User ID Developer declared
- Data Linked to You — Product Personalization — Location — Coarse Location Developer declared
- Data Linked to You — Product Personalization — Usage Data — Product Interaction Developer declared
- Data Linked to You — Product Personalization — User Content — Photos or Videos Developer declared
- Data Linked to You — Contact Info Developer declared
- Data Linked to You — Diagnostics Developer declared
- Data Linked to You — Health & Fitness Developer declared
- Data Linked to You — Identifiers Developer declared
- Data Linked to You — Location Developer declared
- Data Linked to You — Usage Data Developer declared
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Accessibility
No accessibility labels collected yet.
Versions
App Store
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6.10.0
Hello, Zero crew - This release is all about squashing bugs-no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.10.1
Hello, Zero crew - This release is all about squashing bugs-no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.6.0
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.7.0
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.7.1
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.7.2
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.8.0
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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6.8.1
Hello, Zero crew - This release is all about squashing bugs—no new features, just a smoother ride! If you have any feedback or questions, please contact our Support team at zerolongevity.com/support Wishing you a bug-free day!
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7.0.0
Zero just got a whole lot stronger — and we’re excited for you to try it! Most people don’t get enough protein — and that gap only widens when you’re fasting. Yet maintaining and building muscle is one of the key drivers of optimal health at any age. This release adds the feature we’ve always wanted to bring you: a personalized Protein Score that makes it easy to hit your daily target. Just snap a photo of your meal and Zero uses advanced AI to estimate your protein, assess meal composition, and give insightful guidance on how to adjust to hit your target and achieve real results. Combined with our award-winning fasting tools trusted by millions, with an all-new hydration tracking feature, and refined habit tools, this is the most complete version of Zero we’ve ever built.
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7.0.1
Zero just got a whole lot stronger — and we’re excited for you to try it! Most people don’t get enough protein — and that gap only widens when you’re fasting. Yet maintaining and building muscle is one of the key drivers of optimal health at any age. This release adds the feature we’ve always wanted to bring you: a personalized Protein Score that makes it easy to hit your daily target. Just snap a photo of your meal and Zero uses advanced AI to estimate your protein, assess meal composition, and give insightful guidance on how to adjust to hit your target and achieve real results. Combined with our award-winning fasting tools trusted by millions, with an all-new hydration tracking feature, and refined habit tools, this is the most complete version of Zero we’ve ever built.
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7.1.0
Smoother, faster, better. This update focuses on the details that make logging your progress easier than ever. • Faster Meal Logging: We sped up the camera launch, improved flash support, and added smarter quick picks. Re-logging familiar meals now takes just a tap. • Smarter Food Analysis: Get results faster and with higher accuracy. • Flexible Hydration: You can now type in custom water amounts rather than tapping fixed increments. • Bug Fixes: Resolved an issue where notification settings could change unexpectedly.
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7.10.0
A smoother way to log your day. This update refreshes key parts of the Zero experience, making logging and getting started even easier. • Redesigned Logging Sheet: We’ve refreshed the logging experience with a cleaner, more intuitive design for adding meals, activity, sleep, mindfulness, mood, and more. • Improved Onboarding: We’ve refined the onboarding experience with fewer taps and a more consistent interface. • Bug Fixes: Squashed bugs and made additional improvements to keep everything running smoothly.
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7.11.0
· 8 Jul 2026
Discover more. Log with confidence. This update makes it easier to experience meal logging and improves the reliability of some of Zero’s most important flows. • Try Meal Logging for Free: New to meal logging? You can now try it with 3 free meal logs and experience AI-powered nutrition tracking before upgrading to Plus. • Helpful Tips Along the Way: We’ve added in-app tips to help you discover features and get the most out of Zero. • Bug Fixes: Fixed issues affecting meal uploads, onboarding, weight units, and other areas of the app for a smoother experience.
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7.12.0
· 3 Aug 2026
Your fasting companion just got even better. This update brings a completely redesigned Apple Watch experience, deeper fasting insights, and a few quality-of-life improvements throughout the app. • All-New Apple Watch App: We’ve completely redesigned the Zero Apple Watch experience with a fresh new look and expanded fasting functionality, making it easier than ever to start, end, and track your fast from your wrist. • More Detailed Fasting Insights: Explore enhanced fasting zones to better understand what your body is doing throughout every stage of your fast. • Smarter Logging: The logging sheet is now easier to navigate, helping you quickly find the actions you use most. • Bug Fixes: Improved the weight chart experience when no data is available and fixed a dark mode issue on the MVV screen.
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7.2.0
More ways to track. More control. Less friction. This release expands how you log food and track progress, while making it easier to tailor Zero to your goals. • New Barcode Scanning: Log meals even faster by scanning barcodes for packaged foods. Perfect for quick, on-the-go tracking. • Expanded Health Pillars: Track up to six health pillars — Fasting, Protein, Water, Activity, Sleep, and Restoration — giving you a more complete view of your health, with the flexibility to focus on what matters most to you. • Easier Goal Updates: Adjust your daily protein and water targets in just a few taps, so your goals can evolve with you. • Bug Fixes: Resolved an issue where the camera wasn’t visible on some devices during meal logging.
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7.3.0
Save it. Log it. Done. This release makes meal logging faster and more convenient, so you can spend less time tracking and more time reaching your goals. • Saved Meals: Save your favorite meals and log them again in just a tap. No more re-entering the same foods — your go-to meals are always ready when you are. • Refreshed Meal Logging: A cleaner, more intuitive meal logging experience with a smoother flow from start to finish. • Improved Meal Details: The meal detail page is now more responsive, so reviewing what you've logged feels faster and seamless.
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7.3.1
Save it. Log it. Done. This release makes meal logging faster and more convenient, so you can spend less time tracking and more time reaching your goals. • Saved Meals: Save your favorite meals and log them again in just a tap. No more re-entering the same foods — your go-to meals are always ready when you are. • Refreshed Meal Logging: A cleaner, more intuitive meal logging experience with a smoother flow from start to finish. • Improved Meal Details: The meal detail page is now more responsive, so reviewing what you've logged feels faster and seamless.
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7.4.0
Log it like it's hot! This update improves how you track your goals and see your progress in the moment. • Daily Goals, Now in Settings: You can now edit your protein and water goals anytime from My Profile → Daily Goals, in addition to the Today view. • Streamlined Meal Logging: We’ve improved the flow after logging a meal so it’s faster and easier to see your results. • More Reliable Notifications: Fixed an issue where notification settings didn’t always stay off after being disabled. • Deeplink Fixes: Resolved issues where certain links wouldn’t open correctly when launching the app.
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7.5.0
Small improvements, smoother experience. This update adds meal sharing and improves reliability across the app. • Share Your Meals: Fueling strong? Show it off. Text a friend to motivate each other or share on social to inspire others. • Signup & Onboarding Fixes: Fixed issues that could cause crashes during account creation and onboarding. • More Reliable Purchases: Improved account setup to ensure subscriptions are correctly linked to your profile.
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7.5.1
Small improvements, smoother experience. This update adds meal sharing and improves reliability across the app. • Share Your Meals: Fueling strong? Show it off. Text a friend to motivate each other or share on social to inspire others. • Signup & Onboarding Fixes: Fixed issues that could cause crashes during account creation and onboarding. • More Reliable Purchases: Improved account setup to ensure subscriptions are correctly linked to your profile.
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7.6.0
Better goals, better insights. This update helps you personalize your goals and better understand your meals. • Custom Activity & Sleep Goals: Edit your daily goals to fit your lifestyle • Improved Barcode Coverage: We expanded our barcode database so more foods are easier to find and log. • Fresher Oura Syncing: Oura data now updates whenever your latest data is synced. • Meal Breakdown: See a simple breakdown of what’s in each meal. • Settings Improvements: Small updates to make settings easier to navigate.
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7.7.0
Smarter logging. Better visibility. More control. This update brings powerful improvements to meal tracking and your daily timeline experience. • New “Fix It” Meal Editing: Need to correct a meal? Just tell Zero what’s off and we’ll update the meal breakdown and macros for you using AI. • Redesigned Timeline: Activity, sleep, mindful minutes, and more now appear in a refreshed timeline experience that makes your daily progress easier to follow. • Weight Logs Added to Timeline: Your weight entries are now included alongside your other health logs for a more complete picture of your journey. • Bug Fixes: Fixed an issue where the fasting widget could continue running after a fast ended, along with a fix for Apple Watch complications not displaying correctly for some users.
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7.7.1
A small update with important fixes. We’ve resolved an issue affecting Sign in with Apple for some users and made additional improvements to ensure a smoother, more reliable app experience.
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7.8.0
Important fixes and improvements. • Subscription Management Fix: Fixed an issue that could prevent some members who subscribed on the web from managing their subscription through the app. • Subscription Improvements: We’ve made updates to create a smoother experience around membership offers, upgrades, and account management. • Bug Fixes & Performance Enhancements: Squashed bugs and made behind-the-scenes improvements to keep Zero running smoothly.
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7.9.0
More tracking, fewer taps. This update makes it easier to log your progress and stay connected to your health data throughout the day. • New Navigation Experience: Logging is now accessible from anywhere in the app. Quickly add meals, track habits, and record progress with a single tap from the navigation bar. • Explore More of Zero: We’ve expanded visibility of key health metrics and tracking tools, helping you better understand what’s available to support your health journey. • Bug Fixes: Fixed an issue affecting fasting presets and improved the experience for members redeeming special offers through the App Store.
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7.9.1
More tracking, fewer taps. This update makes it easier to log your progress and stay connected to your health data throughout the day. • New Navigation Experience: Logging is now accessible from anywhere in the app. Quickly add meals, track habits, and record progress with a single tap from the navigation bar. • Explore More of Zero: We’ve expanded visibility of key health metrics and tracking tools, helping you better understand what’s available to support your health journey. • Bug Fixes: Fixed an issue affecting fasting presets and improved the experience for members redeeming special offers through the App Store.
Alternatives
- Fasting Tracker • Easy Fast — Same category + similar ratings
- Fasting App: Tracker & Timer — Same category + similar ratings
- FastHabit Intermittent Fasting — Same category + similar ratings
Availability by market
- US
Data quality & evidence
- Page completeness
- Live store listing
- Last verified
- 30 Aug 2026
- Sources
- App Store
- Independent summary has not been published yet.