Zero vs Intermittent Fasting Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zero
This app tracks intermittent fasting and nutrition to help users achieve real body composition changes. It integrates fasting, protein intake, meals, hydration, and habits for a holistic approach to weight loss and metabolic health.
- Intermittent fasting timers and streaks
- Smart meal logging with photo recognition
- Personalized daily protein target tracking
- Integrated fasting and protein tracking
- Water and habit tracking
- Science-based insights on fasting and nutrition
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Zero is the all-in-one fasting tracker and nutrition app built for real results. Most fasting and weight loss apps stop at simply tracking fasts or calories. Zero connects the full picture — fasting, protein, meals, hydration, and habits — so you actually change your body composition, not just your eating schedule. Here’s how Zero helps you get there: • Track your intermittent fasting — Engage timers, streaks, and insights keep you stay motivated and consistent across your entire fasting journey. • Log meals the smart way — Skip the tedious manual meal entry routine. With Zero Plus, snap a photo and get instant macros, protein composition, and clarity on how effectively your meals support your goals. Your first meal logs are on us, so you can try it before you subscribe. • Hit your Protein Score — Zero Plus tracks a personalized daily protein target that adapts to your weight and goals. Better protein = better satiety, better muscle retention, better weight loss. Zero makes it automatic. • Complete the equation: Fasting + Protein — Most people fast or track meals. Zero brings them together so you lose weight, protect muscle, and avoid the pressure and guilt of traditional calorie trackers. • Stay hydrated to power your fasts — Water tracking with Zero Plus helps you maintain energy, reduce cravings, and support metabolic function throughout the day. • Build healthy habits that actually matter — Track movement, sleep, mood, and other daily pillars that reinforce your fasting and fueling routine. • Challenge yourself — Hit protein targets, maintain fasting streaks, and stay accountable with motivating challenges built around outcomes, not vanity metrics. • Learn the real science — Understand how fasting, protein, and hydration work together for sustainable weight loss and metabolic health — with insights from leading experts. • See measurable progress — Watch your streaks grow, your protein consistency rise, and your body composition improve with clean, insightful trend views. Whether you’re starting out or optimizing an existing routine, Zero gives you the structure, guidance, and clarity most apps miss. Zero is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare provider before making any changes to your diet, fasting routine, or health regimen. Zero is free to download, with fasting timers, streaks, weekly trends, expert articles, and challenges included. Zero Plus is an optional subscription that unlocks photo meal logging and your Protein Score, water tracking, custom fasts and saved presets, Fat-Burning Mode, the mood journal and daily habit insights, premium articles and Plus-only challenges, and monthly, yearly, and correlated charts. A free trial is available. Payment for Zero Plus will be charged to your Apple Account when you subscribe. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Manage your subscription in your Account Settings. Read more terms & conditions: Terms of use: https://www.zerolongevity.com/terms-of-use Privacy policy: https://www.zerolongevity.com/privacy-policy
Intermittent Fasting Tracker
This app offers a straightforward and private way to track intermittent fasting. It supports iPhone and Apple Watch, providing essential features like widgets, notifications, and progress charts without any advertisements. Ideal for both beginners and experienced fasters, it focuses on a simple user interface to support health and wellness goals.
- Interactive Widgets
- Notifications
- Streaks & Badges
- Charts & Trends
- Fasting Zones
- iCloud Sync
- Dark Mode
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Track fasting periods with Fasty. No account or sign-up required. Start and stop a fasting timer, set a goal, and review your recorded fasts. Edit entries to correct start and end times and keep a record of your fasting history. Features - Fasting timer: see elapsed time and the time remaining until your chosen goal. - Widgets and Live Activities: check your timer from your Home Screen, Lock Screen, and Dynamic Island on supported devices. - Apple Watch: start and finish fasts, change your goal, and check your current fasting status from your wrist, included for free. - Fasting history: add, edit, and review your recorded fasts. - Charts and trends: explore fasting durations, totals, and averages over time. - Notifications: choose reminders and alerts for your timer and eating window. - Siri and Shortcuts: start and finish fasts and check your current fasting status. - CSV import and export: import existing records or export your data for use outside the app. - Dark Mode: use a light or dark appearance to suit your preference. - Streaks and badges: view summaries and milestones based on your recorded fasts. Additional paid features are available through one-time purchases and auto-renewable subscriptions. Available options, included features, and prices are shown in the app before purchase. Subscriptions renew automatically unless canceled. You can manage or cancel them in your App Store account settings. Health information Fasty is a utility for people who want to track their fasting. It does not recommend fasting or a specific fasting plan and does not provide medical advice. Consult a doctor, registered dietitian, or another qualified healthcare professional about whether and how to fast. Privacy Policy: https://fastyfasting.com/#privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Zero and Intermittent Fasting Tracker both sit at 4.8 stars, but that hides the real split: 97% of Intermittent Fasting Tracker's written reviews are positive against 33% of Zero's. Zero's advantage is chart position (#115 vs unranked) and ratings volume (445K vs 51K). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Zero sells 10 in-app purchases, starting at $9.99 per month and Intermittent Fasting Tracker sells 17 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for Zero against 4.9 for Intermittent Fasting Tracker. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 51K, so its average is the more settled of the two. Written reviews are what separate them: 33% of Zero's written reviews are positive against 97% of Intermittent Fasting Tracker's.
Zero ships an update every 2 weeks, Intermittent Fasting Tracker every 10 days. Both last shipped on September 24, 2026.
| Parameter | Zero | Intermittent Fasting Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (445K ratings) | 4.9 (51K ratings) — better |
| Positive reviews | 32.6% of reviews | 96.8% of reviews — better |
| Number of ratings | 445K — better | 51K |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | #115 — better | — |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 238 MB | 109 MB |
| Age rating | 17+ | 12+ |
| Developer | Zero Longevity Science, Inc. | Kai Oelfke |
Customer experience
Zero
Intermittent Fasting Tracker
User reviews
Zero
From 445K App Store ratingsWhat we love
- 🚀 Easy to use
- 📊 Helpful tracking and data
- 💡 Informative learning resources
- 🔍 Detailed fasting information
- 🤝 Sense of community
Room to improve
- 💰 Expensive premium subscription
- 🔒 Forced account creation
- 🙄 Intrusive ads and upsells
- 🤔 Inconsistent or confusing UI changes
- 🐛 Syncing and login issues
Intermittent Fasting Tracker
From 51K App Store ratingsWhat we love
- 👍 Simple and easy to use
- 🚀 Straightforward fasting tracking
- 🔒 No ads or subscriptions
- 💡 Customizable fasting times
- 👍 Clean and intuitive interface
Room to improve
- 🐛 Occasional issues with time tracking
- 💡 Desire for more customization options
- 💡 Request for monthly/yearly fasting view
- 💡 Interest in adding notes or logging features
Bugs and requests
Zero
Reported bugs
3 issues- Password reset problems
- Inaccurate fasting time tracking
- Inability to exit trial without subscribing
Requested features
6 requests- Custom fasting periods longer than 24 hours
- Ability to edit fasting type and duration
- Integration with more health/fitness apps
- Water intake tracking
- Personalized fasting recommendations
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- Improved data visualization and analytics
Intermittent Fasting Tracker
Reported bugs
2 issues- Overlapping fasting/eating windows reported
- Inconsistencies in fasting time calculations
Requested features
4 requests- Ability to schedule and set reminders for fasts
- Option to manually log ketosis levels
- Export or share fasting data
- More detailed fasting stage information
In-app purchases
Zero
- Zero Plus Subscription2 variants$9.991 Month
- Zero Plus Subscription7 Days trial$9.991 Month
- Zero Plus Subscription$39.991 Year
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- Zero Plus Subscription7 Days trial$49.991 Year
- Zero Plus Subscription7 Days trial3 variants$69.991 Year
- Zero Plus Subscription$69.991 Year
- Zero Plus Subscription1 Year trial3 variants$69.991 Year
- Zero Plus Subscription1 Month trial$69.991 Year
- Zero Plus Subscription1 Month trial$89.991 Year
- Zero Plus Subscription7 Days trial$89.991 Year
Intermittent Fasting Tracker
- Fasty Monthly Donation$0.991 Month
- Fasty Basic Monthly$0.991 Month
- Fasty Monthly Donation$1.991 Month
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- Fasty Basic Monthly$1.991 Month
- Fasty Monthly Donation$2.991 Month
- Fasty Basic Yearly$4.991 Year
- Fasty Basic Yearly$6.691 Year
- Fasty Pro Monthly2 variants$6.991 Month
- Fasty Pro Yearly2 variants$19.991 Year
- One Time Donation$4.99
- Fasty Basic One Time$9.99
- One Time Donation$9.99
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- One Time Donation$14.99
- One Time Donation$24.99
- One Time Donation$34.99
- Fasty Pro One Time2 variants$49.99
- One Time Donation$49.99
Questions
Is Zero free?
Is Intermittent Fasting Tracker free?
Which has better reviews, Zero or Intermittent Fasting Tracker?
Do Zero or Intermittent Fasting Tracker have ads?
Which is updated more often, Zero or Intermittent Fasting Tracker?
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