Zero vs InterFasting
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
InterFasting
This app helps users succeed with intermittent fasting through scientific and systematic management. It offers AI-powered schedule and calorie recommendations, a simple timer, and comprehensive tracking of fasting hours, meals, workouts, and water intake. Users can visualize progress and receive detailed reports to build healthy habits.
- AI fasting schedule recommendations
- AI food calorie calculation
- Intermittent fasting timer
- Customizable fasting plans
- All-in-one health tracking
- Fasting analysis and reports
- Home screen widget
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Want to succeed with intermittent fasting and achieve your weight loss goals? Meet InterFasting—the ultimate AI-powered intermittent fasting tracker and smart diet companion trusted by millions worldwide! Instead of just starving yourself, InterFasting helps you build sustainable, healthy habits through scientific, data-driven, and systematic health management. Start your smart wellness journey with the highest-rated fasting app on the App Store. ■ WHY CHOOSE INTERFASTING? [NEW] INTRODUCING INTERFASTING AI • AI Schedule Recommendations: No more guessing! Our advanced AI automatically analyzes your lifestyle to recommend the perfect, customized intermittent fasting plan. • AI Calorie Counter & Food Scanner: Simply snap a photo of your meal. The AI instantly calculates calories and macros to effortlessly log and manage your diet. THE EASIEST INTERMITTENT FASTING TIMER • Supports all popular fasting methods including 16:8, 5:2, OMAD (One Meal a Day), and custom circadian rhythm schedules. • Receive smart, timely alarms for your fasting start and end times. (※ Please enable notification settings!) 100% CUSTOMIZABLE & AD-FREE FASTING • Adjust your fasting times and schedules completely free. • Track, edit, and manage your personalized fasting plan with a clean, ad-free interface. ALL-IN-ONE HEALTH & WEIGHT TRACKER • Monitor everything in one place: fasting hours, weight loss progress, meal logs, workout activity, and daily water intake. SCIENTIFIC FASTING ANALYSIS & REPORTS • Access detailed body statistics, fasting history, and meal calorie data. • Stay motivated with comprehensive weekly and monthly progress reports. CONVENIENT HOME SCREEN WIDGETS • Check your current fasting stage, countdown timer, and control your status instantly right from your home screen. HOUR-BY-HOUR BODY STAGES INFO • Learn what happens inside your body during a fast (Ketosis, Autophagy, etc.). Understanding these metabolic changes is the key to long-term success. VISUAL PROGRESS & PHOTO DIARY • Log your meals and take "Eye Body" progress photos. Seeing your physical transformation over time is the ultimate motivation to keep going! ■ THE SCIENCE-BACKED BENEFITS OF FASTING • Effective Weight Loss & Fat Burn: Target stubborn body fat and optimize metabolism. • Boosted Autophagy & Cellular Repair: Enhance cellular health and longevity. • Improved Blood Sugar Control: Increase insulin sensitivity and manage glucose levels naturally. • Reduce Inflammation: Lower oxidative stress and support your body’s natural detox. • Enhanced Mental Clarity: Experience razor-sharp brain function and steady energy levels. ■ PERFECT FOR ANYONE WHO WANTS TO: • Try intermittent fasting for the first time and need a beginner-friendly guide. • Stay accountable with a systematic, automated fasting tracker. • Achieve healthy weight loss, keto diet goals, or better metabolic health. • Stop struggling with complex calorie counting and manual meal logging. The secret to a successful lifestyle change is consistency. InterFasting is here to help you build healthy habits that last. Download InterFasting now and unlock your healthy transformation! *** APPLE HEALTH INTEGRATION *** InterFasting seamlessly integrates with the Apple Health app to automatically sync and track your weight, steps, and workout data. --- ABOUT SUBSCRIPTIONS & PAYMENT • Payment will be charged to your Apple ID account at confirmation of purchase. • You can manage or cancel your subscription in your App Store Account Settings at any time. • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. - Terms of Service: https://www.interfasting.app/service_en - Privacy Policy: https://www.interfasting.app/privacy_en
Screenshots
Verdict
Zero and InterFasting both sit at 4.8 stars, but that hides the real split: 88% of InterFasting's written reviews are positive against 33% of Zero's. InterFasting also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (15.0 vs 17.0). Zero's advantage is ads (none vs shown) and ratings volume (445K vs 267). On price, rating, in-app purchases and monetization model 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 InterFasting sells 3 in-app purchases, starting at $3.99 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 4.8 for InterFasting. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 267, 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 88% of InterFasting's.
Zero ships an update every 2 weeks, InterFasting every 2 days. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | Zero | InterFasting |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (445K ratings) | 4.8 (267 ratings) |
| Positive reviews | 32.6% of reviews | 88.4% of reviews — better |
| Number of ratings | 445K — better | 267 |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | #115 — better | — |
| Devices | iPhone, Apple Watch | iPhone, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 238 MB | 85 MB |
| Age rating | 17+ | 4+ |
| Developer | Zero Longevity Science, Inc. | Kim Yunhoo |
Customer experience
Zero
InterFasting
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
InterFasting
Not enough reviews yet to summarise bugs or requests.
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
InterFasting
- Premium 1 month$3.991 Month
- Gandan Premium Annual$12.991 Year
- Premium User$12.99
Questions
Is Zero free?
Is InterFasting free?
Which has better reviews, Zero or InterFasting?
Do Zero or InterFasting have ads?
Which is updated more often, Zero or InterFasting?
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