Zero: Fasting & Food Tracker

Zero: Fasting & Food Tracker

Protein & Calorie Calculator

445K ratings
1310 reviews
#109 in top-grossing Health & Fitness
🌟 Lifestyle
💪 Health & Fitness
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 23, 2016
  • August 3, 2026

Features

Zero: Fasting & Food Tracker screenshot #1 for iPhone
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Zero: Fasting & Food Tracker screenshot #8 for iPhone
Zero: Fasting & Food Tracker screenshot #9 for iPhone
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About

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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What users say

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+1

What's New in Zero

7.12.0

August 3, 2026

Your fasting companion just got even better. This update brings a completely redesigned Apple Watch experience, deeper fasting insights, and a few quality-of-life improvements throughout the app. • All-New Apple Watch App: We’ve completely redesigned the Zero Apple Watch experience with a fresh new look and expanded fasting functionality, making it easier than ever to start, end, and track your fast from your wrist. • More Detailed Fasting Insights: Explore enhanced fasting zones to better understand what your body is doing throughout every stage of your fast. • Smarter Logging: The logging sheet is now easier to navigate, helping you quickly find the actions you use most. • Bug Fixes: Improved the weight chart experience when no data is available and fixed a dark mode issue on the MVV screen.

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Subscription plans

Zero Plus Subscription

Access to Zero Plus features and content

$69.991 Year
7 Days trial
How to cancel Zero subscription ⁉️

Charts

Top Grossing

📉 109-2

Health & Fitness

This app dropped -2 positions in Health & Fitness chart.

Last updated on August 9, 2026.

Events

Read more about Zero Days of Summer

Zero Days of Summer

7-day 16:8 to nix BBQ bloat

Jul 15, 2025 Jul 22, 2025

User reviews

No free features

It irritates me when an app makes you go through all the whole signup process and only to find out everything is behind a paywall. No thank you.

Only for if you can’t tell time.. support is useless

Pretty much will count zero out for good, signed up for a free trial. Wasn’t notified for renewal and was hit with a yearly price for an app this useless. reached out to support never helped.

They made it difficult to use.

It used to be pretty easy and straightforward, they made it to difficult and confusing now, Incant figure out how to start a simple fast now after they botched the interface, I’m giving two stars because they ruined my fasting app.

Super helpful!

Really like this app it’s very helpful! Had it a couple years, but recently they added a calorie tracker in a snapshot, I love this feature! The only thing I would change is if they could show how they are allocating the calories to the individual ingredients, because sometimes they are off by quite a bit. I just go through and adjust where I can.
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Scam

You sign up for a free trial but when you go to cancel, they make it so incredibly difficult. It’s almost impossible. I still cannot figure out how to cancel. They send you in loops never-ending loops that don’t go anywhere. It’s a scam.

Developer apps

User experience

🐞

Reported Bugs

3 issues

Password reset problems

Bug

Inaccurate fasting time tracking

Bug

Inability to exit trial without subscribing

Bug

Requested Features

6 requests

Custom fasting periods longer than 24 hours

Feature

Ability to edit fasting type and duration

Feature

Integration with more health/fitness apps

Feature

Water intake tracking

Feature

Personalized fasting recommendations

Feature

Improved data visualization and analytics

Feature

FAQ

What does the Zero app do?

Zero is an all-in-one fasting tracker and nutrition app designed to help users achieve real body composition changes. It integrates intermittent fasting timers, protein tracking, meal logging, hydration, and habit tracking to provide a comprehensive approach to weight loss and metabolic health.

What are the key features of Zero?

Key features include timers and streaks for intermittent fasting, smart meal logging with photo recognition for instant macro and protein analysis, personalized daily protein target tracking, water and habit tracking, and science-based insights from experts on fasting and nutrition.

How much does Zero cost?

Zero offers a free version with an optional subscription for premium features. A free trial is available for the premium subscription. Payment for Zero Plus is charged to your iTunes Account upon subscription.

Is Zero compatible with my device?

The provided description does not specify device compatibility. However, it mentions that payment for Zero Plus will be charged to your iTunes Account, suggesting compatibility with iOS devices. Users should check the app store for specific device requirements.

What are common use cases for Zero?

Common use cases include tracking intermittent fasting periods, monitoring daily protein intake to support muscle retention and satiety, logging meals efficiently, staying hydrated, building healthy habits like sleep and mood tracking, and learning about the science behind fasting and nutrition for sustainable weight loss.