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Best Intermittent Fasting Apps for Your Buck 2021

Serious about intermittent fasting? Here are the best paid tracking apps we tested to take your health to the next level.

Health & Fitness
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Aubrey Rinehart Aubrey Rinehart Data_checker
Best Intermittent Fasting Apps for Your Buck 2021

Is intermittent fasting really just skipping breakfast to shed pounds? Technically, yes, but if you want to optimize your fasts to hit real health goals, an IF app coach is a great resource. We tested 9 different paid fasting app subscriptions to see which one provided the best value for the cost and determined that Simple's premium subscription was the winner at $29.99/year or $4.99/month. Here's how we came to these conclusions:

Table of Contents

  1. 1. Apps We Selected
  2. Our Pick Simple: Intermittent Fasting Simple: Intermittent Fasting Runner Up Zero - Intermittent Fasting Zero - Intermittent Fasting Also Groovy FastHabit Intermittent Fasting FastHabit Intermittent Fasting Also Groovy Fastic - Intermittent Fasting Fastic - Intermittent Fasting Also Groovy LIFE Fasting Tracker & Timer LIFE Fasting Tracker & Timer
  3. 2. Everything We Recommend
  4. 3. The 411 from our Appventurer
  5. 4. Other Apps Considered
Our Pick

Incredible deal for some of the best features

  • Simple weight loss via intermittent fasting using nutrition and water trackers.
    4.7 Ratings 167K+ Reviews 1M+ Downloads
    Free Fresh In App Purchases
    Free In-App Purchases
    Free In-App Purchases


Simple absolutely stood out to us from the beginning. It was the one we found ourselves gravitating towards early on and the one we were most excited to open each day.

Why we chose Simple:

  • Features are surprisingly robust considering the app is one of the cheapest that we tested at $29.99/yr ($2.49/mo) and $4.99/mo
  • The personalized insights were our favorite feature of all features across the apps and the most helpful for learning more about fasting
  • Great analytics and statistics with updated recommendations week by week depending on your progress
  • Motivating stats updates and achievements
  • Our favorite for meal tracking and easy to use fasting tracker that’s flexible day by day

After fasting with all of these apps, our appventurer lost 5 pounds in just the first 10 days. But Simple felt like the easiest to use everyday and the most motivating to come back to, so it seems the best for keeping up progress long-term.

Read Simple's Full Review
Runner Up

A gamified health journey with awesome graphs

  • Fast for whole body health & reach your goals with the #1 fasting tracker.
    4.8 Ratings 424K+ Reviews 1M+ Downloads
    Free Fresh In App Purchases
    Free In-App Purchases
    Free In-App Purchases


This was another one we were excited to open each day, especially because of how aesthetically compelling this app is. It wins the prize for having the best graphs and analytics.

Why we chose Zero:

  • Most detailed and helpful graphs of all the apps, including time in fasting zones and fasting hours vs. weight, sleep, and resting heart rate
  • Tons of extra content included in the price of $69.99/yr ($5.83/mo) or $9.99/mo, including videos, articles, and meditations
  • Ability to choose a coaching program that fits your lifestyle and schedule
  • Gamified with cool badges (that made us feel like a Pokemon trainer)
  • Very quick and easy-to-use fasting timer and mood journal with widgets and voice command-enabled capabilities

Similar to Simple, we felt like this one would be super easy to use long-term, which is important if you’re going to invest in a tracking app. The only downside is the pricey subscription, but considering it has dietician-recommended recipes and guided meditations, we think it’s still a great value for the cost.

Read Zero's Full Review
Also Groovy

Hands-down best budget choice

  • Track your fasts and progress
    5.0 Ratings 11K+ Reviews
    Free In App Purchases
    Free In-App Purchases


FastHabit was the least expensive option of all the paid apps we tried, and it still manages to be a perfectly acceptable option. This one would be especially great for those who want something simple but still user-friendly, motivating, and helpful for setting and achieving goals.

Why we chose FastHabit:

  • Only costs a one-time fee of $2.99 (no subscription needed!) but still has great tracking features and analytics

  • Completed fasts streak for motivation

  • Simple and flexible fast tracking timer with reminders and quick entry for logging fasts and weight manually

  • Clear graphs based on your set fasting program and goals

If you really don’t need all the frills of recipes, workouts, learning guides and meditations, this is the app to go to. Another app that’s easy to come back to and great for if you forgot to stop or start your timer.

Read FastHabit's Full Review
Also Groovy

Approachable app for fasting beginners: Fastic

  • Fast for health (IF-Plan). With the weight loss fasting tracker/timer. No Diet
    4.7 Ratings 632K+ Reviews 5M+ Downloads
    Free Fresh In App Purchases
    Free In-App Purchases
    Free In-App Purchases


Fastic has such a welcoming and friendly vibe along with easily digestible information, so it is invaluable for those that have never fasted before. It is also very Headspace-like, so if you’re into mindfulness along with your health, this is the app for you.

Why we chose Fastic:

  • Checklist of daily tasks and challenges to establish a routine, including learning resources, fasting phases, breathing reminders, and more

  • Daily streak counter is a great incentive for checking in

  • Collect stars to buy “frosties” for cheat days

  • Clear stat graphs and fasting zone calculations to see you progress each day

  • Can subscribe to a three month plan for $27.49 with a satisfaction guarantee of losing 3% of your body weight or your money back

This tracker is very goal-oriented and strives to set you up for success but breaks everything down into manageable, day by day tasks. If you’ve been looking for a healthy lifestyle change but haven’t known where to get started, this is a great option, even though it is also on the pricier side.

Read Fastic's Full Review
Also Groovy

Fasting meets social network

  • Intermittent fasting for weight loss & improved health. Simple & easy to use.
    4.8 Ratings 114K+ Reviews 1M+ Downloads
    Free Fresh In App Purchases
    Free In-App Purchases
    Free In-App Purchases


We’re not going to sugar coat it. Starting a diet or healthier lifestyle doesn’t mean you’ll start feeling amazing right off the bat. In fact, the beginning can be pretty rough, and sometimes the best motivation is knowing you’re not alone and having people you can reach out to if needed. The LIFE app fills this need wonderfully.

Why we chose LIFE Fasting Tracker:

  • Set up a predefined or custom fasting schedule and track and share your progress with photos in an exclusive social circle for only $2.99/mo

  • Ability to talk face to face with an expert personal trainer, healthcare professional, dietician, or mindfulness coach about a wide range of topics starting at $25 for a 30 minute private call

  • Personalized progress and checkup reports with the option to include blood test results for more detailed insights

  • A robust learning library tab with articles and videos

Actually, many of the features of this app are free, which is a great benefit in itself. But the ability to take your fasts to the next level with personalized help when you need it is a major asset.

Read LIFE Fasting Tracker's Full Review

Everything We Recommend

  • Our Pick
    With this simple intermittent fasting app with meal tracker and water tracker features, keeping track of your eating habits and achieving weight loss results has never been easier! Learn how to fast and lose weight, get simple healthy diet tips with Simple – a meal planner and fasting tracker app with diet tracker, weight loss tracker, and food and water tracker (yes, you have to drink water in sufficient amounts!) features. Intermittent fasting is the most popular, healthy, and effective weight-loss method and it’s trusted by hundreds of millions worldwide!

    In a nutshell, Simple provides the following set of features:

    - Intetmittent fasting tracker;
    - Weight loss tracker;
    - Water tracker & drink water reminder;
    - Nutrition tracker.

    What is intermittent fasting (IF) and why can it help?

    IF is the most ancient eating pattern known to humans and anyone can benefit from it. You alternate eating and fasting periods and use the Simple intermittent fasting tracker app to set up your schedule. For example, you fast during a 16-hour window and can then eat during 8 hours (16:8 fasting).

    IF does not tell you what food you can’t eat or to count your calories – it’s not a strict diet plan for weight loss. Instead, it simply asks that you eat zero calorie during a specific period each day.

    This simple fasting app is worth it. Even short fasting periods (12 hours or more that you can set in the fasting timer) may result in weight loss, improved metabolic flexibility, and reduce the risk of metabolic diseases. This small lifestyle change will enable you to reinstate normal processes in your body that you’ve lost due to frequent eating. You just have to make sure to drink water during your fasting period. And the best thing is that you have a meal planner, food tracker, and water tracker all in one place – the Simple app. The app’s water drinking reminder will be your best assistant in your fasting periods.

    How do I start IF?
    You don’t have to download many fasting apps or know anything about fasting. Simple will guide you and help you achieve your health goals. Simple is not just a fasting tracker. It’s an intermittent fasting app that provides you with health, weight loss, and cognitive power.

    This simple fasting app prepares a program, teaches you about IF, and helps you calculate fasting time mindfully and easy.

    What does Simple offer?
    Simple helps you fast with:
    – Daily customized tips and life hacks
    – Expert advice – Smart and flexible tracking
    – Easy start/end to your fasts with one quick click, set fasting reminder
    – A step-by-step guide to intermittent fasting
    – Tips to develop a healthy eating habit
    – Custom fasting protocols
    – Easy-to-use meal journal for mindful eating

    Fasting protocols in the Simple app:
    – A fasting 16:8 timer (16-hour fasting, 8-hour eating), 5:2, 18:6, 20:4, 14:10
    – OMAD - one meal a day
    – Circadian Rhythm Fasting

    This free fasting app also includes additional products for purchase.

    Privacy Policy:
    Terms of Use:
    In-App Purchases
    $4.99 - $119.99 per item
    $14.99 - $49.99 per item
  • Runner Up
    Zero is the world's most popular fasting app.
    As seen in Women’s Health, The Tim Ferriss Show, The Drive and more.
    Unlock the power of intermittent fasting to improve your health and manage weight.

    Zero’s advisory team includes some of the world’s leading doctors and researchers, including our Chief Medical Officer Dr. Peter Attia, who guides our fasting protocols and content creation.

    Reach your healthy weight goals no matter what diet you follow - from keto, or low carb, to simple calorie counting - and unlock the full longevity benefits of fasting through Zero’s expert guidance and content.


    TIMER - Set your goal, start your timer, stay on track. We’ll be with you from start to finish with reminders and insights to keep you motivated.

    LEARN - Fuel your fast with our ever-growing content library curated by Chief Medical Officer, Dr. Peter Attia.

    STATISTICS - Chart your progress and map your journey with an all new calendar view. Sync with Google Fit to track health markers like weight and sleep to see how they evolve with your fasting practice.

    JOURNAL - Reflect on how you feel during your fasts. We'll graph your moods so you can track trends and adjust over time.

    CHALLENGES - Opt into Challenges that align with your goals, invite friends, unlock Achievements, and stay motivated with guidance from our experts and the chance to win exclusive prizes.

    Unlock all of the benefits of fasting with Zero Plus.

    CUSTOM PLANS - Fast track your fasting goals with a personalized protocol and adaptive recommendations from our team of experts.

    PREMIUM CONTENT - Cut through the noise with an exclusive, ever-growing library of videos, articles, audio segments, and Q&As from fasting experts like Dr. Peter Attia.

    FASTING ZONES - Know what's happening in your body so you can stay motivated to reach key metabolic milestones.

    ADVANCED STATISTICS - See how your fasting practice correlates with other health markers like weight and heart rate. Spot trends and adjust your behavior to stay on target.

    ASK ZERO - An expert in your pocket. Submit your fasting questions, then tune in for a chance to get answers from experts like Dr. Peter Attia.

    CUSTOM PRESETS - When your fasting needs are more unique than our popular presets, you can create your own.

    ADVANCED JOURNAL WITH IN-THE-MOMENT MOTIVATION - Feeling hungry? Log your mood and receive responsive content including exclusive Fasting Meditations.

    With Zero you can quickly start your fast based on science from leading doctors and researchers.

    • 16-HOUR FAST, or the 16:8 Intermittent Fast, used by celebrities when preparing for blockbuster films and millions of Zero users to manage weight.

    • CIRCADIAN RHYTHM FAST, based on research by Dr. Satchin Panda (Salk Institute), this 13-hour fast starts around sunset to align your eating window with your body’s clock. Zero automatically calculates the daily sunset for you.

    • 18-HOUR FAST, or 18:6 for more advanced fasters

    • Other popular fasts include OMAD (one meal a day), 20:4 fast and custom fasts up to 7 days

    • Unlock achievements to celebrate milestones and stay motivated

    Choose your favorite fasting protocol and Zero will track your progress on your Android device with Google Fit integration to sync your weight and sleep.

    Zero Plus terms:

    Payment will be charged to the credit card connected to your Google 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 by going to your Account Settings.

    Read more terms & conditions:
    Terms of use:
    Privacy policy:
    In-App Purchases
    $9.99 - $69.99 per item
    $9.99 - $69.99 per item
  • Also Groovy

    FastHabit Intermittent Fasting

    5.0 Ratings 11K+ Reviews
    FastHabit helps you start and stay consistent with Intermittent Fasting. Set your fast length, log daily, and use advanced features like reminders, weight tracking and Health App syncing, Apple Watch integration, calendar views, data export, and multi-day fasting to track your progress and accelerate your results. SIMPLE, FLEXIBLE TRACKING - Choose how many hours you want to fast - Keep your motivation in view- See percent complete, time completed, time remaining, and target end. - Easy editing. Stop, restart, or adjust your fast at any time. SYNC EVERYWHERE - Apple Watch integration: Leave your phone at home and still track your fast. - Save and transfer your fasts to a new device with iCloud syncing - Sync your weight tracking with your Apple Health App profile SET REMINDERS AND NOTIFICATIONS - Choose the days and times you want reminders to start fasting - Get a notification when your fast is complete MOTIVATIONAL STATS AND PROGRESS: - 10 day Snapshot with ‘streaks’ to show how many days in a row you’ve fasted and how many days you’ve met your goals – a great way to stay motivated. - Calendar and weekly views with daily details - Weight tracking views with fasting overlay MORE GREAT FEATURES - Apple watch complications - iPhone widget - Getting started guide - Enhanced support for longer, multi-day fasts - Export your data Fast Habit has been featured in GQ, the Guardian, and Fast Company. Have feedback or a suggestion for the app? We'd love to hear from you. Send us an email at
    In-App Purchases
    $2.99 per item
    Say bye, bye to fad diets and start intermittent fasting with Fastic. We’re the world’s largest fasting community with over 20M users, so you’ll find the motivation and support you’re looking for. Look good, feel great and develop healthy habits with the expert-backed Fastic app.

    So, how does it really work?
    Intermittent fasting has been shown to lead to sustainable weight loss. That means you’ll get reconnected to your body for results that last. When fasting, your body enter ketosis, the body’s “fat-burning” process. You’ll have more energy during this time to do what you love, and lose stubborn fat at the same time!

    Is Intermittent Fasting healthy?
    Yes. The Nobel Prize-winning fasting method is safe and natural. Studies show that giving the body a short break from constant digestion gives vital organs a chance to rest, and even promotes cell regeneration!

    Is the Fastic App suitable for me?
    The Fastic app is great for beginners and fasting veterans alike. You won’t need to change your diet, or restrict any groups of food. It’s super easy to integrate into your life!

    Why Intermittent Fasting?
    ✔ Burns body’s fat reserves
    ✔ Promotes regeneration and detoxification
    ✔ Slows down aging process
    ✔ Can prevent diabetes and other diseases
    ✔ Simulates production of human growth hormone
    ✔ Increases metabolism
    ✔ Boosts health and energy
    ✔ Improves brain and body functions
    ✔ Sheds fat naturally and effortlessly
    ✔ Improves life quality
    ✔ Helps lose weight without dieting
    ✔ Avoids yo-yo effect
    ✔ Avoids calorie-counting

    🧡 Start Intermittent Fasting with Fastic
    ✔ Fasting Timer – Tracks fasting window effortlessly
    ✔ Body Status – Identifies and tracks key stages in your fasting journey
    ✔ Water Tracker – Logs your water intake and sends reminders
    ✔ Step Counter – Monitors your step count to enhance your progress
    ✔ Continuous app development and feature updates
    ✔ Suitable for both beginners and advanced
    ✔ Suitable lifestyle change for men and women
    ✔ Compatible with building muscle and weight training
    ✔ Stable and sustainable results versus yo-yo diets
    ✔ Google Fit synchronization possible
    ✔ Free of advertising

    🤝 Become Part of the Fastic-Plus Community and Reach Your Goals Even Faster
    🥇 Recipe Book – Explore over 400 simple, delicious recipes
    🥇 In-House Academy – Learn more about all things healthy living
    🥇 Daily Challenges – Stay on track with motivating challenges
    🥇 Weekly Challenges – Check out a variety of fun tasks to build healthy habits
    🥇 Fasting Buddies – Connect with Fastic friends to stay accountable
    🥇 Social Media Channel – Get inspired and stay in the loop
    🥇 Expert guidance to reach your goals faster
    🥇 Valuable insights to monitor your progress
    🥇 Daily schedule tailored to your needs

    🚀 Long-Term Benefits
    • Achieve your ideal body type in the most natural and sustainable way
    • Strengthen your immune system with your body’s self-healing mechanism
    • Consciously boost fat loss
    • Detoxify your body through fasting-related cell-regenerating processes
    • Normalize your blood sugar level by stabilizing insulin levels
    • Refresh your life quality by activating your natural anti-aging process
    • Restore your balance as intermittent fasting connects body, mind and soul
    • Protect yourself from illnesses like heart disease and diabetes
    • Reduce or prevent allergies and inflammations

    Fast according to your daily life
    ✅ Gentle – 12:12 | 13:11 | 14:10
    ✅ Moderate – 15:9 | 16:8 | 17:7
    ✅ Intense – 18:6 | 19:5 | 20:4

    What are you waiting for?

    Feel good, guaranteed! Download it now for free!

    Studies on intermittent fasting:
    Fastic Plus Feel Good Guarantee:

    Intermittent fasting is not suitable for pregnant/nursing women, children under 18 years of age or persons with diagnosed eating disorders.
    *Individual results may vary
    In-App Purchases
    $4.99 - $134.99 per item
    $11.99 - $39.99 per item
    Take control of your health and reach your goals with intermittent fasting. Whether you want to lose weight, have more energy, live longer, or just improve your overall health, LIFE Fasting can help you.

    Featured on Women's Health, Good Morning America, USA Today, Men’s Health, Good Housekeeping, PopSugar, and more.

    Track your intermittent fasting progress over time, share updates with friends in social circles, access health assessments and calculators, and stay up to date on the latest health news with our science-backed articles.

    Take one step closer to your goals and get started today. Free features:

    FASTING TIMER - Start and stop your fasts with a single tap. Our fasting arc shows you how you're progressing with your current fast and when you've crossed over into the "keto zone" (AKA fat burning!).

    FAST YOUR WAY - Supports all types of intermittent fasting styles. It's a simple tap to do 16:8, 24 hours, or any other IF window you want!

    SOCIAL CIRCLES- Fasting is better with friends. Receive support, motivation, accountability, and tips from the awesome LIFE Fasting community!

    LEARNING LIBRARY - Learn about the health benefits of intermittent fasting and stay up to date on the latest health information. Our research-backed fasting and health articles are added weekly and regularly reviewed by our science team.

    TRACKING - Log your weight, measurements, ketones, blood glucose, and mood to track your progress over time.

    ASSESSMENTS & CALCULATORS - From macro and BMR calculators to health assessments, we have tools to help you better understand your health and meet your goals.

    Take your fasting to the next level with LIFE+ for only $2.99/month. LIFE+ features:

    NEW! LES MILLS FITNESS VIDEOS - Access a huge library of premium on-demand workout videos from Les Mills. From kickboxing to strength training to yoga, there is a workout for everyone!

    FASTING SCHEDULES - Choose from popular intermittent fasting plans or create your own custom fasting schedule. Receive reminders when it's time to start and end your fast and get a handy eating window timer!

    HABIT TRACKERS - Track daily glasses of water, steps, flossing, and much more! There are several habit trackers to choose from to fit your health goals.

    ENHANCED STATS - Unlock monthly and yearly views of your fasting data and progress. You'll also see your tracked ketone measurements alongside the fasting arc.

    VISUAL PROGRESS - See your progress with private selfies. Securely upload photos with your weight entries.

    EXCLUSIVE CIRCLE - Access our exclusive LIFE+ subscribers-only circle where you can connect with other members. Get intermittent fasting tips & advice along with health science updates.

    For more information about the LIFE Fasting Tracker and science-backed articles for improving your health, visit

    Visit for more information about the LIFE+ subscription.

    Terms of use:
    Privacy policy:
    In-App Purchases
    $2.99 per item
    $2.99 per item
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The 411 from our Appventurer

Comments 1
  • according to me spotify is best app to be used that is free to listen all the kinds of musics on our own and also there will be ads in the middle

Aubrey Rinehart
Written by:

Aubrey Rinehart

I’ve been hooked on apps ever since my first download of Tap Tap Revenge on my 2nd generation iPod Touch. Now I rely heavily on a wide variety of apps for all of my day to day functions. As a type one diabetic, I depend on many of them to manage my health, and some of them quite literally save my life. I most frequently use apps that help keep me organized, especially as far as my schedule and finances, but for fun I also enjoy my apps for social media, games and other entertainment.

I really am happiest when I get to be creative, which is why I love to write. Since graduating with my bachelor’s degree, I’ve written for blogs, created website copy, and composed various informational content. I love the opportunity to use writing as a tool to effectively communicate my ideas and opinions, and to express my experiences and research. I’m happy to use my skills to help others discover their new favorite apps!

Best Intermittent Fasting Apps for Your Buck 2021




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