Comparison

Zero vs Fastime 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

Fastime Fasting Tracker

This free intermittent fasting tracker helps you achieve health goals with intuitive tools, reminders, and progress insights. It offers custom fasting goals and HealthKit integration for weight tracking, all without requiring signups or displaying ads.

Highlights
  • Completely Free & Ad-Free
  • No Signups Needed
  • Custom Fasting Goals
  • Health Trends & Insights
  • Reminders & Encouragement
  • HealthKit Integration
Read full description

Fastime is the new free intermittent fasting tracker, empowering you to achieve your health goals with ease. Completely free, no adverts, and with no signups required, Fastime is the best app to help you track your intermittent fasting. With intuitive tools for tracking, reminders, and progress insights, Fastime is your perfect companion for a healthier lifestyle. Key Features: - Completely Free & Ad-Free: No hidden costs or annoying distractions. - No Signups Needed: Start fasting immediately. - Custom Fasting Goals: Tailor fasting to suit your lifestyle. - Health Trends: Track your progress with clear, insightful data. - Reminders & Encouragement: Stay motivated with gentle nudges. - Health Insights: View detailed stats to stay on track. - HealthKit integration for weight tracking. I made Fastime because intermittent fasting transformed my health and I wanted a free, easy to use fasting app with no ads and signups. With many more features planned, download Fastime now and let me know what else you would like added and contribute to creating the best Intermittent Fasting Tracker. Take charge of your health with Fastime!

Screenshots

Zero4 screens
Fastime Fasting Tracker4 screens

Verdict

The call

Zero and Fastime Fasting Tracker both sit at 4.8 stars, but that hides the real split: 100% of Fastime Fasting Tracker's written reviews are positive against 32% of Zero's. Fastime Fasting Tracker also leads on in-app purchases (none vs 10). Zero's advantage is ratings volume (445K vs 11) and chart position (#101 vs unranked). 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 7 in-app purchases, starting at $9.99 per month. Fastime Fasting Tracker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fastime Fasting Tracker holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Zero has 445K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 32% of Zero's written reviews are positive against 100% of Fastime Fasting Tracker's.

UpkeepUpdate frequency

Zero ships an update every 2 weeks, Fastime Fasting Tracker every 9 days. The most recent releases landed on November 5, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 6 level
Zero versus Fastime Fasting Tracker: the parameters behind the verdict, then further details
ParameterZeroFastime Fasting Tracker
PriceFreeFree
Rating4.8 (445K ratings)5.0 (11 ratings) — better
Positive reviews32.0% of reviews100.0% of reviews — better
Number of ratings445K — better11
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
Best chart rank#101 — better—
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size195 MB4 MB
Age rating17+17+
DeveloperZero Longevity Science, Inc.Costa Stathis

Customer experience

Zero

All ratings445,285 ratings
Positive96.3%
Neutral2.1%
Negative1.6%
Written reviews1,400 reviews
Positive32.0%
Neutral8.6%
Negative59.4%

Fastime Fasting Tracker

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Fastime Fasting Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Zero

Subscriptions7
  • Zero Plus Subscription2 variants$9.991 Month
  • Zero Plus Subscription7 Days trial$9.991 Month
  • Zero Plus Subscription7 Days trial2 variants$69.991 Year
Show 4 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 Subscription7 Days trial$89.991 Year
None

Fastime Fasting Tracker

No in-app purchases

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is Fastime Fasting Tracker free?
Fastime Fasting Tracker is free to download, with no in-app purchases.
Which has better reviews, Zero or Fastime Fasting Tracker?
Fastime Fasting Tracker is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Fastime Fasting Tracker averages 5.0 from 11 ratings.
Do Zero or Fastime Fasting Tracker have ads?
Neither Zero nor Fastime Fasting Tracker shows ads.
Which is updated more often, Zero or Fastime Fasting Tracker?
Zero ships an update every 2 weeks, and Fastime Fasting Tracker every 9 days. Most recently, Zero was updated on November 5, 2026 and Fastime Fasting Tracker on November 4, 2026.

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