Comparison

Zero vs Fasting Timer & 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

Fasting Timer & Tracker

This app helps users adopt intermittent fasting for weight loss and improved health. It provides guidance, timers, and notifications to support various fasting plans, making it accessible for both beginners and experienced users.

Highlights
  • Intermittent fasting plans
  • Fasting timer and notifications
  • Weight loss support
  • Detox and regeneration guidance
  • Beginner and experienced friendly
  • One-tap start/end fasting
Features
Read full description

FastTrack your intermittent fasting tracker will guide you to a new lifestyle with healthy habits. Your all-in-one solution for losing weight effectively and achieving your health and wellness goals! EFFICIENCY It’s proven that intermittent fasting leads to fast weight loss. During fasting, as your glycogen depletes, your body switches to ketosis, which is referred to as the body's "fat-burning" mode. This is an effective way to burn fat. SAFETY Yes. It’s the most natural and safe way to lose weight. Studies show that eating all the time makes your body unable to take a break from digesting, which can result in health problems, such as diabetes. When you fast, you just take a break from eating, it takes some of the load off your liver. With various fasting plans, FastTrack: Fasting Tracker is suitable for beginner and experienced, men and women. It guides you through your plan. No need to change your diet, you can easily stick to it. If you are under 18 years old, pregnant or breastfeeding, have health issues or are underweight, please ask your doctor for advice before fasting. * Burn your body fat reserves * Start the process of regeneration and detox during fasting * Slow down the aging process * Benefit for controlling blood sugar * Reduce inflammation * Prevent numerous diseases, such as heart diseases and diabetes * Boost your growth hormone and increase metabolism * Make you feel healthier and more active * Improve your body and brain function * The most natural way to lose weight and keep fit * Lose weight without diet and exercise FEATURES OF FASTING TRACKER * Various intermittent fasting plans * For both beginner and experienced * One tap to start/end * Set notifications for fasting * Fasting timer * No need to count calories intake SCIENTIFICALLY PROVEN INTERMITTENT FASTING Effectively Lose Weight Your body switches into fat-burning mode. You’ll burn body fat reserves and prevent the food you eat from being stored as fat. Natural and Healthy When fasting, your body will actively burn fat, get into detox mode, and start the process of regeneration. Detox Your body reduces inflammation. Cells break down viruses, bacteria, and damaged components. Prevent Diseases Studies show that fasting can prevent numerous diseases, such as heart disease, diabetes, and cancer. Cell Repair and Regenerate Cells remove unnecessary or dysfunctional components. Damaged cells will be replaced with stronger ones. Against Aging Your body initiates autophagy, a process of detoxification, repair, and regeneration. This has benefits against aging. Control Blood Sugar Fasting helps you become more sensitive to insulin. It’s beneficial for controlling blood sugar. Increase Metabolism During fasting, your growth hormone goes up, and your metabolism will be increased. Privacy Policy and Terms of Use: https://www.loyal.app/privacy-policy

Screenshots

Zero4 screens
Fasting Timer & Tracker4 screens

Verdict

The call

The clearest difference is review sentiment: Fasting Timer & Tracker at 100% against Zero's 32%. Fasting Timer & Tracker also leads on rating (5.0 vs 4.8) and iOS requirement (15.0 vs 17.0). Zero's advantage is ads (none vs shown) and ratings volume (445K vs 2). On price, in-app purchases, monetization model and device support 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 10 in-app purchases, starting at $9.99 per month and Fasting Timer & Tracker sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Fasting Timer & 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 2, 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 Fasting Timer & Tracker's.

UpkeepUpdate frequency

Zero ships an update every 2 weeks, Fasting Timer & Tracker every 2 months. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

Scorecard7 real differences · 4 level
Zero versus Fasting Timer & Tracker: the parameters behind the verdict, then further details
ParameterZeroFasting Timer & Tracker
PriceFreeFree
Rating4.8 (445K ratings)5.0 (2 ratings) — better
Positive reviews32.3% of reviews100.0% of reviews — better
Number of ratings445K — better2
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
Best chart rank#112 — better—
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size238 MB71 MB
Age rating17+4+
DeveloperZero Longevity Science, Inc.Loyal Health & Fitness, Inc.

Customer experience

Zero

All ratings445,297 ratings
Positive96.3%
Neutral2.1%
Negative1.6%
Written reviews1,378 reviews
Positive32.3%
Neutral8.6%
Negative59.1%

Fasting Timer & Tracker

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 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

Fasting Timer & Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Zero

Subscriptions10
  • Zero Plus Subscription2 variants$9.991 Month
  • Zero Plus Subscription7 Days trial$9.991 Month
  • Zero Plus Subscription$39.991 Year
Show 7 more
  • 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
1 purchases

Fasting Timer & Tracker

Subscriptions1
  • IFX+$2.991 Month

Questions

Is Zero free?
Zero is free to download, with in-app purchases available.
Is Fasting Timer & Tracker free?
Fasting Timer & Tracker is free to download, with in-app purchases available.
Which has better reviews, Zero or Fasting Timer & Tracker?
Fasting Timer & Tracker is rated higher. Zero averages 4.8 out of 5 from 445K ratings, while Fasting Timer & Tracker averages 5.0 from 2 ratings.
Do Zero or Fasting Timer & Tracker have ads?
Fasting Timer & Tracker shows ads; Zero does not.
Which is updated more often, Zero or Fasting Timer & Tracker?
Zero ships an update every 2 weeks, and Fasting Timer & Tracker every 2 months. Most recently, Zero was updated on October 4, 2026 and Fasting Timer & Tracker on October 3, 2026.

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