Zero: Fasting Timer

Zero: Fasting Timer

AI Macro & Diet Tracker

445K ratings
1299 reviews
#91 in top-grossing Health & Fitness
🌟 Lifestyle
💪 Health & Fitness
Free
In-App Purchases

Details

  • Released
  • Updated
  • December 23, 2016
  • July 8, 2026

Features

Zero: Fasting Timer screenshot #1 for iPhone
Zero: Fasting Timer screenshot #2 for iPhone
Zero: Fasting Timer screenshot #3 for iPhone
Zero: Fasting Timer screenshot #4 for iPhone
Zero: Fasting Timer screenshot #5 for iPhone
Zero: Fasting Timer screenshot #6 for iPhone
Zero: Fasting Timer screenshot #7 for iPhone
Zero: Fasting Timer screenshot #8 for iPhone
Zero: Fasting Timer screenshot #9 for iPhone
iphone
watch
🖼️Get Icon
Icons↘︎

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
Show original description

What users say

See all reviews

What's New in Zero

7.11.0

July 8, 2026

Discover more. Log with confidence. This update makes it easier to experience meal logging and improves the reliability of some of Zero’s most important flows. • Try Meal Logging for Free: New to meal logging? You can now try it with 3 free meal logs and experience AI-powered nutrition tracking before upgrading to Plus. • Helpful Tips Along the Way: We’ve added in-app tips to help you discover features and get the most out of Zero. • Bug Fixes: Fixed issues affecting meal uploads, onboarding, weight units, and other areas of the app for a smoother experience.

More

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

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

Last updated on July 28, 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

Not worth it

I used this app when it was free and it doesn’t have much improvement. Don’t bother

everything is behind a paywall now

i used to use this app years ago and found it to be SO helpful to keep track of my fasts and how my body was during them. downloaded again after i had gained roughly 30 lbs from unexpected health issues and i can see basically nothing unless i pay for it. this is unfortunately not how the app used to be at all and was so disappointing.
Show more

I don’t recommend

It would let me cancel my subscription and they charged me $89.99

New interface sucks

Since moving functionality and ease of use behind the Zero Plus paywall the app has become difficult to use so I will be deleting it and moving to something else.

Look at What You’ve Become…

I’ve used Zero for years because it’s simple to use, but over the years I’ve noticed the escalating efforts to sell a Premium subscription which I understand from a business perspective. Today was the final straw, I couldn’t log a fast without agreeing to a free-seven day trial that I would have to consciously cancel in time if I didn’t want to be charged for a subscription plan. I really dislike this gotcha approach to tricking customers into buying something that they don’t want let alone removing the ability to say ‘no thanks’. Some of us just want to enjoy the solidity of the timer which no longer appears to be possible with this app. Very disappointing.
Show more

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.