Comparison

Zero vs Intermittent Fasting

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 helps you track intermittent fasting and nutrition to achieve 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
  • Photo-based meal logging with macro analysis
  • Personalized daily protein targets
  • Water intake tracking
  • Habit tracking (movement, sleep, mood)
  • Progress visualization and trend analysis
  • Expert 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

Track your eating schedule, receive guidance, and enhance your daily fasting experience. Achieve your weight goals, improve health, and increase energy within a supportive community.

Highlights
  • Fasting schedule tracking
  • Personalized fasting plans
  • Health and energy boost tips
  • Weight loss guidance
  • Fasting community support
  • Beginner and experienced plans
Features
Read full description

Fasting App is the easiest way to keep track of your eating routine, get tips along the way and make your daily fasting better. Reach your goal weight, get healthy and boost your energy in a fasting community. The fasting method is safe and natural. This is your way of feeling at your best with the healthy and effective weight-loss method, that is trusted by hundreds of millions of people worldwide. You don't need to count calories all the time. Enjoy your food, then fast some part of the day. When fasting, your body goes into a fat burning process called ketosis. You’ll feel light and full of energy during this time to do what you love and lose fat at the same time! The app is great for beginners and experienced fasters alike. We'll help you find a plan that suits you and your goal. Then you'll get tips and motivation to stick to your plan. You don’t need to change your eating habits or avoid any groups of food. Just start fasting in the evening for at least 12 hours, most of which will occur when you are sleeping. Use Fasting App to get the most out of each day. Let's start the journey to a better version of yourself. You will see the result in the mirror in just a few weeks. Get the long-lasting health benefits. Subscription & Terms Fasting App is a freemium. You can use some intermittent fasting plans for free as well as get a personal plan and all the app's features by subscribing. Subscribe in the app to get premium access. You can also choose a trial period and try all the premium features for free. No obligation, free to cancel anytime. Subscriptions can be managed and auto-renewal turned off in Account Settings in iTunes after purchase. Read our Terms of Service at: https://fasting.beauty/termsofuse/ For the Privacy Policy, please visit: https://fasting.beauty/privacy/

Screenshots

Zero4 screens
Intermittent Fasting4 screens

Verdict

The call

The clearest difference is ratings volume: Zero at 445K against Intermittent Fasting's 1K. Zero also leads on chart position (#124 vs unranked). Intermittent Fasting's advantage is review sentiment (50% vs 32%). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zero sells 8 in-app purchases, starting at $9.99 per month and Intermittent Fasting sells 10 in-app purchases, starting at $4.99 per 7 days. 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 4.8 for Intermittent Fasting. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 1K, 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 50% of Intermittent Fasting's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on November 7, 2026.

Scorecard3 real differences · 8 level
Zero versus Intermittent Fasting: the parameters behind the verdict, then further details
ParameterZeroIntermittent Fasting
PriceFreeFree
Rating4.8 (445K ratings) — better4.8 (1K ratings)
Positive reviews32.0% of reviews50.0% of reviews — better
Number of ratings445K — better1K
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
Best chart rank#124 — better—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size188 MB54 MB
Age rating17+4+
DeveloperZero Longevity Science, Inc.AirShape

Customer experience

Zero

All ratings445,321 ratings
Positive96.3%
Neutral2.1%
Negative1.6%
Written reviews1,400 reviews
Positive32.0%
Neutral8.6%
Negative59.4%

Intermittent Fasting

All ratings1,024 ratings
Positive93.5%
Neutral4.1%
Negative2.4%
Written reviews24 reviews
Positive50.0%
Neutral33.3%
Negative16.7%

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

From 1K App Store ratings

What we love

  • 👍 Great app design
  • 🚀 Simple and easy to use
  • 💡 Helpful for weight loss and fasting
  • 🚀 Tracks fasting progress well

Room to improve

  • 🐛 App freezes on goals page
  • 🐛 Help link crashes the app
  • 🐛 Incomplete information display
  • 🐛 UI issues with screen fitting
  • 🐛 Inability to edit fasting logs

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

Reported bugs

5 issues
  • App freezes on goals page
  • Help link crashes the app
  • Incomplete information display
  • UI issues with screen fitting
  • Inability to edit fasting logs

Requested features

4 requests
  • Allow changing app icon color
  • Add more diet and recipe tips
  • Implement dark mode option
  • Provide more detailed statistics

In-app purchases

8 purchases

Zero

Subscriptions8
  • Zero Plus Subscription7 Days trial$9.991 Month
  • Zero Plus Subscription$9.991 Month
  • Zero Plus Subscription7 Days trial2 variants$69.991 Year
Show 5 more
  • Zero Plus Subscription$69.991 Year
  • Zero Plus Subscription1 Year trial2 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
10 purchases

Intermittent Fasting

Subscriptions10
  • Weekly Subscription3 Days trial$4.997 Days
  • Monthly Fasting Subscription7 Days trial$6.991 Month
  • Monthly Fasting Subscription7 Days trial$10.491 Month
Show 7 more
  • Monthly Fasting Subscription7 Days trial$12.491 Month
  • Intermittent Fasting Timer7 Days trial$12.993 Months
  • Quarterly Fasting Subscription7 Days trial$16.993 Months
  • The Fasting7 Days trial$19.993 Months
  • App Intermittent Fasting7 Days trial$29.991 Year
  • Annually Fasting Subscription7 Days trial$39.991 Year
  • Annually Subscription7 Days trial$59.991 Year

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is Intermittent Fasting free?
Intermittent Fasting is free to download, with in-app purchases available.
Which has better reviews, Zero or Intermittent Fasting?
Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Intermittent Fasting averages 4.8 from 1K ratings.
Do Zero or Intermittent Fasting have ads?
Neither Zero nor Intermittent Fasting shows ads.
Which is updated more often, Zero or Intermittent Fasting?
Zero ships an update every 2 weeks, and Intermittent Fasting every 2 weeks. Most recently, Zero was updated on November 7, 2026 and Intermittent Fasting on November 7, 2026.

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