Comparison

Zero vs Fasting Tracker 16

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

Fasting Tracker 16

This app helps you track intermittent fasting periods and achieve health goals. It offers an intuitive interface, supports various fasting methods, and provides motivational support for your wellness journey.

Highlights
  • Intuitive fasting period tracking
  • Supports multiple fasting methods (16/8, 5:2)
  • Customizable fasting experience
  • Motivational support and reminders
  • User-friendly interface
Features
Read full description

Welcome to Fastea Unlock the power of intermittent fasting with Fastea. Effortlessly track your fasting periods and achieve your health goals with our intuitive fasting app. Whether you're a beginner or a seasoned faster, Fastea is the perfect intermittent fasting tracker to guide you every step of the way. Stay motivated, improve your wellness, and see the results of your weight loss journey with Fastea. Download now and join thousands of users transforming their lives through the benefits of intermittent fasting. Why Fastea is the Top Intermittent Fasting Companion • Simplicity and Intuitive Tracking: Fastea is designed for user-friendly operation, making intermittent fasting tracking effortless. Focus on your health goals and let Fastea handle the details. • Adaptable Tracker for Every Fasting Method: Fastea accommodates various fasting methods, such as 16/8, 5:2, and more. Customize your fasting experience to suit your specific needs. • Motivational Support: Fastea provides continuous motivation and support throughout your fasting journey. Stay on track with regular reminders and an engaging community. Start your journey today with Fastea. As your companion, Fastea ensures your health and wellness goals are attainable and enjoyable. Download Fastea now - the optimal intermittent fasting companion that understands and supports you every step of the way.

Screenshots

Zero4 screens
Fasting Tracker 164 screens

Verdict

The call

The clearest difference is rating: Zero at 4.8 against Fasting Tracker 16's 4.3. Zero also leads on ratings volume (445K vs 6) and update cadence (every 2 weeks vs monthly). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Zero sells 8 in-app purchases, starting at $9.99 per month and Fasting Tracker 16 sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Zero holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 6, so its average is the more settled of the two.

UpkeepUpdate frequency

Zero ships an update every 2 weeks, Fasting Tracker 16 monthly. The most recent releases landed on November 12, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 7 level
Zero versus Fasting Tracker 16: the parameters behind the verdict, then further details
ParameterZeroFasting Tracker 16
PriceFreeFree
Rating4.8 (445K ratings) — better4.3 (6 ratings)
Positive reviews32.0% of reviews—
Number of ratings445K — better6
Update frequencyEvery 2 weeks — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#115 — better—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size188 MB21 MB
Age rating17+4+
DeveloperZero Longevity Science, Inc.Taras Chernyshenko

Customer experience

Zero

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

Fasting Tracker 16

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%

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

Fasting Tracker 16

Not enough reviews yet to summarise bugs or requests.

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
3 purchases

Fasting Tracker 16

Subscriptions3
  • Monthly Momentum$4.991 Month
  • Weekly Plan$4.997 Days
  • Yearly Transformation$24.991 Year

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is Fasting Tracker 16 free?
Fasting Tracker 16 is free to download, with in-app purchases available.
Which has better reviews, Zero or Fasting Tracker 16?
Zero is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Fasting Tracker 16 averages 4.3 from 6 ratings.
Do Zero or Fasting Tracker 16 have ads?
Neither Zero nor Fasting Tracker 16 shows ads.
Which is updated more often, Zero or Fasting Tracker 16?
Zero ships an update every 2 weeks, and Fasting Tracker 16 monthly. Most recently, Zero was updated on November 12, 2026 and Fasting Tracker 16 on November 8, 2026.

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