Comparison

Zero vs FastTrack 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 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

FastTrack Fasting Tracker

This app helps you track intermittent fasting with customizable timers and the ability to edit past entries. It offers free basic features and a premium subscription for advanced options like detailed statistics and custom fasting windows. Your data is kept private on your device.

Highlights
  • Customizable fasting timers
  • Edit past fasts
  • Streak tracking
  • Smart reminders
  • Advanced statistics
  • CSV export
Features
Read full description

FastTrack is a fasting timer that never holds your data hostage. Start a fast in one tap and see exactly how long is left. Started before you opened the app, or forgot to log yesterday? Fix it in two taps. Editing your own history is free, and always will be. FREE, FOREVER - 16:8, 18:6 and 20:4 timers with a live countdown - Add, edit and delete any past fast, including a wrong start time - Streaks that count days, and forgive the day you have not logged yet - Reminders that match your actual state and go quiet once you reach your goal - Everything stays on your device FASTTRACK PREMIUM - OMAD (23:1), plus custom windows from 1 to 23 hours - The full fasting stage timeline, from fed state to autophagy, with the hours - Detailed statistics and CSV export - A daily reminder at a time you pick WHAT YOU WILL NOT FIND No account to create. No quiz before the app works. No ads. No coach selling you a diet. FastTrack Premium is a subscription: 4.99 USD per month, or 29.99 USD per year with the first 14 days free. Prices are shown in local currency by region. Cancel any time during the free trial and you are not charged. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically for the same price and period unless it is cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your Apple Account settings after purchase. Terms of Use (EULA): https://thedolceway.com/terms Privacy Policy: https://thedolceway.com/privacy

Screenshots

Zero4 screens
FastTrack Fasting Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: FastTrack Fasting Tracker at none against Zero's 10. Zero's advantage is update cadence (every 2 weeks vs every 3 months) and ratings volume (445K vs 1). On price, rating, ads 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. FastTrack Fasting Tracker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FastTrack 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 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Zero ships an update every 2 weeks, FastTrack Fasting Tracker every 3 months. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
Zero versus FastTrack Fasting Tracker: the parameters behind the verdict, then further details
ParameterZeroFastTrack Fasting Tracker
PriceFreeFree
Rating4.8 (445K ratings)5.0 (1 ratings) — better
Positive reviews32.0% of reviews—
Number of ratings445K — better1
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFreemium
Best chart rank#119 — better—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size188 MB3 MB
Age rating17+4+
DeveloperZero Longevity Science, Inc.Dt nova

Customer experience

Zero

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

FastTrack Fasting Tracker

All ratings1 ratings
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

FastTrack Fasting Tracker

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
None

FastTrack Fasting Tracker

No in-app purchases

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is FastTrack Fasting Tracker free?
FastTrack Fasting Tracker is free to download, with no in-app purchases.
Which has better reviews, Zero or FastTrack Fasting Tracker?
FastTrack Fasting Tracker is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while FastTrack Fasting Tracker averages 5.0 from 1 ratings.
Do Zero or FastTrack Fasting Tracker have ads?
Neither Zero nor FastTrack Fasting Tracker shows ads.
Which is updated more often, Zero or FastTrack Fasting Tracker?
Zero ships an update every 2 weeks, and FastTrack Fasting Tracker every 3 months. Most recently, Zero was updated on November 10, 2026 and FastTrack Fasting Tracker on October 31, 2026.

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