Comparison

Zero vs Intermittent Fasting Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Intermittent Fasting Tracker

This app helps users achieve sustainable weight loss and health goals through personalized intermittent fasting plans and an AI-powered calorie counter. It offers features like food scanning, hydration tracking, and detailed progress monitoring. Users can access science-based insights and healthy recipes to support their journey.

Highlights
  • Personalized fasting plans
  • AI calorie counter and food logger
  • Water and hydration tracker
  • Science-based insights and body status
  • Customizable fasting schedules
  • Healthy recipes and meal planning
  • Progress tracking (weight, BMI, glucose, etc.)
Features
Read full description

Join 60 million happy users! Our all-in-one Intermittent Fasting Tracker & AI Calorie Counter is built for sustainable weight loss. Reach your goals effectively without the yo-yo effect. Discover your personalized plan, perfect for beginners and experienced users. Whether you want to lose weight, build muscle, or maintain your weight, we support every step of your journey! ◆ KEY FEATURES ◆ • No Account Required • Simple Fasting Tracker • AI Calorie Counter & Food Logger • Science-Based Insights, Body Status, and Fasting Tips • Custom Fasting Plans • Water Tracker & Hydration • Professional Recipes & Meal Plans • All-in-one Tracker: Sleep, Steps, Weight, BMI, Body Data, Glucose, Resting Heart Rate, Ketones • Sync with Apple Health • Visual Charts: Track Trends & Data Comparisons ◆ NEW: AI CALORIE SCANNER & NUTRITION ◆ Stop guessing and start understanding your food. We’ve made logging meals as easy as taking a picture. • AI Food Scanner: Snap a photo to identify food and calculate calories instantly • Barcode Scanner: Scan packaging for verified nutrition facts • Macro Tracker: Monitor Protein, Carbs, Fats, and Fiber to fuel your body • Calorie Deficit: View daily intake vs. goals for steady progress • Nutrition Insights: See if your food choices align with your goals ◆ MASTER YOUR FASTING ◆ • Smart Fasting Timer: One tap to start or end your fast • Various Fasting Plans: Include 14:10, 16:8, 20:4, and OMAD (One Meal A Day) • Custom Schedules: Set daily, weekly, or custom plans to fit your unique lifestyle • Body Status: Know exactly when you enter Fat Burning or Ketosis modes • Fasting Insights: Get guidance on body changes, plus tips on how to eat and drink • Hunger Test: Check if it is physical or emotional hunger to fast smarter • Smart Notifications: Never forget when your window starts or ends ◆ TRACK EVERY STEP OF PROGRESS ◆ • See Your Progress: Log Weight, BMI, and Body Measurements to track your success • Know Your Body: Track Glucose, Ketones, and Heart Rate to stay on top of your health • Stay Balanced: Sync Steps and Sleep patterns to manage your energy and rest ◆ RECIPES & MEAL PLANNING ◆ • Healthy Recipes: Explore Keto, Vegan, and Low-Carb meals tailored for fasting • Clear Nutrition: See calorie and macro facts for every recipe • Meal Planning: Create a nutrition plan based on your preferences ◆ STAY MOTIVATED & CONSISTENT ◆ • Habit Streaks: Keep streaks alive to build lasting lifestyle changes • Challenges: Join millions of users to push your limits and stay accountable ◆ GO PREMIUM TO REACH YOUR GOAL FASTER ◆ Upgrade to unlock the full potential of your health journey. • All Intermittent Fasting Plans: Access OMAD and completely custom schedules • Advanced Calorie Tracker: Get detailed macro analysis for every meal • Custom Goals: Set personalized calorie and nutrient targets • Premium Recipes: Unlock healthy meals perfect for your eating window • No Ads: Focus entirely on your results ◆ SCIENTIFIC BENEFITS OF FASTING ◆ • Natural Weight Loss: Lose weight without strict diets • Boost Metabolism: Trigger natural fat-burning and growth hormone • Cellular Regeneration: Promote autophagy and detox processes • Better Health: Improve insulin sensitivity and blood sugar levels • Anti-Aging: Support longevity and slow down aging • Brain Function: Improve cognitive performance and focus • Reduce Inflammation: Support overall immune health Download Intermittent Fasting Tracker today! Combine the power of a professional Fasting Timer with an AI Calorie Scanner to build healthy habits and lose weight effectively. Note: If you are under 18, pregnant, breastfeeding, or have health issues, please consult your doctor before fasting. Privacy Policy: https://fasting.leaphealth.fitness/privacypolicy.html Terms of Use: https://fasting.leaphealth.fitness/terms.html

Screenshots

Zero4 screens
Intermittent Fasting Tracker4 screens

Verdict

The call

Zero and Intermittent Fasting Tracker both sit at 4.8 stars, but that hides the real split: 73% of Intermittent Fasting Tracker's written reviews are positive against 32% of Zero's. Intermittent Fasting Tracker also leads on iOS requirement (15.5 vs 17.0). Zero's advantage is ads (none vs shown) and ratings volume (445K vs 29K). On price, rating, update cadence and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zero sells 10 in-app purchases, starting at $9.99 per month and Intermittent Fasting Tracker sells 14 in-app purchases, starting at $4.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

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 29K, so its average is the more settled of the two. Written reviews are what separate them: 32% of Zero's written reviews are positive against 73% of Intermittent Fasting Tracker's.

UpkeepUpdate frequency

Zero ships an update every 2 weeks, Intermittent Fasting Tracker every 8 days. Both last shipped on October 28, 2026.

Scorecard5 real differences · 6 level
Zero versus Intermittent Fasting Tracker: the parameters behind the verdict, then further details
ParameterZeroIntermittent Fasting Tracker
PriceFreeFree
Rating4.8 (445K ratings)4.9 (29K ratings) — better
Positive reviews32.2% of reviews73.3% of reviews — better
Number of ratings445K — better29K
Update frequencyEvery 2 weeksEvery 8 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFreemium
Best chart rank#112 — better—
DevicesiPhone, Apple WatchiPhone, iPod, Apple Watch — better
Requires iOS17.015.5 — better
Further details — not scored
Size195 MB255 MB
Age rating17+4+
DeveloperZero Longevity Science, Inc.Leap Health

Customer experience

Zero

All ratings445,285 ratings
Positive96.3%
Neutral2.1%
Negative1.6%
Written reviews1,393 reviews
Positive32.2%
Neutral8.5%
Negative59.3%

Intermittent Fasting Tracker

All ratings29,120 ratings
Positive98.0%
Neutral0.5%
Negative1.5%
Written reviews1,819 reviews
Positive73.3%
Neutral5.5%
Negative21.2%

User reviews

Zero

From 445K App Store ratings

What 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 29K App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Helpful features
  • 💡 Customizable fasting plans
  • 🚀 Intuitive interface
  • 👍 Motivating progress tracking

Room to improve

  • 🐛 Inconsistent calorie tracking
  • 🔍 Limited food database
  • 💸 Excessive ads in free version
  • 🐛 Freezing/crashing issues
  • 🔍 Syncing problems with Apple Health

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
Show 1 more
  • Improved data visualization and analytics

Intermittent Fasting Tracker

Reported bugs

3 issues
  • Incorrect weight unit conversions
  • Fasting timers not updating in real-time
  • Inability to resume fasts after accidental end

Requested features

5 requests
  • Add exercise tracking
  • Improve water logging options
  • Provide more customization for fasting plans
  • Integrate with more health apps
  • Add ability to pause fasting periods

In-app purchases

10 purchases

Zero

Subscriptions10
  • Zero Plus Subscription2 variants$9.991 Month
  • Zero Plus Subscription7 Days trial$9.991 Month
  • Zero Plus Subscription$39.991 Year
Show 7 more
  • 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
14 purchases

Intermittent Fasting Tracker

Subscriptions13
  • Monthly Premium Subscription7 Days trial$4.491 Month
  • Premium Monthly$9.991 Month
  • Monthly Subscription$12.991 Month
Show 10 more
  • Premium Yearly(Half Price)$14.991 Year
  • Fasting+: Diet Planner$14.991 Month
  • Annual Premium$19.991 Year
  • Half year subscription$29.996 Months
  • Premium Yearly7 Days trial$29.991 Year
  • Pro: Full Access$29.991 Year
  • Annual Subscription7 Days trial$39.991 Year
  • Fasting Plus: Lose Weight$39.991 Year
  • Pro: Unlimited Access7 Days trial$49.991 Year
  • Pro: Fasting with Coach Guide7 Days trial$69.991 Year
One-time1
  • Remove ads$2.99

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is Intermittent Fasting Tracker free?
Intermittent Fasting Tracker is free to download, with in-app purchases available.
Which has better reviews, Zero or Intermittent Fasting Tracker?
Intermittent Fasting Tracker is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Intermittent Fasting Tracker averages 4.9 from 29K ratings.
Do Zero or Intermittent Fasting Tracker have ads?
Intermittent Fasting Tracker shows ads; Zero does not.
Which is updated more often, Zero or Intermittent Fasting Tracker?
Zero ships an update every 2 weeks, and Intermittent Fasting Tracker every 8 days. Most recently, Zero was updated on October 28, 2026 and Intermittent Fasting Tracker on October 28, 2026.

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