The Best Intermittent Fasting Apps of 2025: From Nutrition Experts

If you want simple fasting reminders, detailed calorie tracking, or full wellness integrations, these expert-approved picks blend convenience with science to help you stay on track, no matter how hectic life gets. Read on for our top choices that we feel confident can help you succeed in your personal goals while you’re crushing your professional goals too.

Best Intermittent Fasting Apps of 2025

• Best Intermittent Fasting App Overall: Simple App
• Best Intermittent Fasting App for Weight Loss: Reverse Health
• Best Free Intermittent Fasting App: Zero
• Best Intermittent Fasting App with Extra Features: DoFasting
• Best Intermittent Fasting App with Calorie Tracking: Yazio

Best Intermittent Fasting Apps Comparison Table

Best Intermittent Fasting App Overall: Simple App

Simple App

An intermittent fasting app with smart tracking tools, personalized insights, and science-backed guidance

Fortune score

4/5

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at Simple

Key product features

• Our thoughts: Simple stands out for its elegant interface and approachable coaching style.
• Who it’s for: Busy professionals who want structure and accountability without strict meal plans or constant calorie counting
• What makes it different: A data-driven approach combined with daily tips, mood tracking, and gentle reminders that help users stay consistent

Pros and Cons

Pros

• Intuitive fasting and hydration tracking
• Personalized insights backed by behavioral science
• Friendly reminders to keep you on track

Cons

• Limited free version features
• No direct food logging or recipe database
• Learning curve for first-time fasting users

Our Thoughts on Simple App

We chose Simple as the best intermittent fasting app overall because it meets professionals where they are—busy, goal-oriented, and short on time. Its blend of smart analytics and approachable education helps users understand how fasting affects their energy, focus, and long-term progress. Unlike rigid diet programs, Simple emphasizes mindfulness and flexibility, making it a sustainable companion for anyone looking to manage weight without overhauling their routine.

Pete tested the Simple App for seven days to support his intermittent fasting routine. He followed the plan consistently throughout the week. Overall, Pete said he had a positive experience using the app, rating it a 4 out of 5.

He found the recommendations in the app easy to follow, giving them a score of 4 out of 5. “When I downloaded Simple, I was prompted to answer a series of questions about my age, current weight, dietary preference, eating habits, sleep patterns, activity level, and goals. This information allowed the Simple App to recommend a plan tailored to my specific goals,” Pete said. “If you have weight loss goals, you can enter your goal weight with the option to include a date or an event you’re trying to get in shape for. I set an upcoming 5K run event as my deadline, and Simple created a timeline for when I would expect to meet that goal if I followed the app’s guidance.”

Unlike some other options, this app doesn’t have a community to talk to or personalized coaching. However, it does offer an AI assistant, which can answer questions and provide guidance on healthy recipes, workout ideas, and improving your meal scores, our tester said. 

You can log your meals by taking photos or describing them in the app. Simple also offers easy-to-read articles written by a dietitian that provide extra guidance on nutrition and fasting. “The accountability aspect comes from the app’s reminder system, which keeps you aware of when your fasting window starts and ends so you stay on track,” Pete said. He rated the accountability aspect of Simple as a 3 out of 5.

Pete thinks that Simple is a great choice for anyone wanting to try intermittent fasting with additional support for their nutrition or weight loss journey. There are premium personalized plans, but Pete found the free weight loss program to be robust and allows you to experience the app’s interface before deciding whether or not to upgrade to the paid subscription for additional personalized guidance.

Best Intermittent Fasting App for Weight Loss: Reverse Health

Reverse Health

Developed for sustainable weight loss, focusing on hormonal balance, nutrition, and long-term habit change

Fortune score

4.5/5

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at Reverse Health

Key product features

• Our thoughts: We love the personalized approach– plans center around each user’s goals, age, and metabolic needs
• Who it’s for: Professionals seeking targeted, sustainable weight loss through IF combined with guidance and educational support
• What makes it different: The app blends fasting with customized nutrition plans, mindset coaching, and exercise recommendations

Pros and Cons

Pros

• Personalized weight loss and fasting plans
• Backed by medical and nutrition science
• Includes mindset and lifestyle coaching

Cons

• Requires a paid subscription for full access
• Setup process can be time-intensive
• Less flexibility for users who prefer self-guided fasting

Our Thoughts on Reverse Health

We chose Reverse Health as our pick for the best intermittent fasting app for weight loss because it treats weight management as a whole-body process, not just a fasting schedule. Its combination of personalized nutrition, educational support, and expert-backed coaching makes it ideal for busy professionals seeking measurable, long-term results. The app is aimed at intermittent fasting for women but can be used by anyone.

“My overall experience was great,” Paige, our tester, said, rating her overall experience a 5 out of 5. “I could absolutely see myself using this app long term to reach my goals. It was easy to stick to and fun to navigate.” 

After using the app consistently for a week, she was thrilled with the ease of use, giving the instructions a 5 out of 5. She was also impressed with the simplicity of the meal plan recipes. Plus, while eating on the app’s meal plan, she didn’t feal hungry at any point. “The recipes were very easy to follow and had simple ingredients,” she said.

On accountability, our team also gave Reverse Health an overall 5 out of 5 rating. The app sends consistent notifications as reminders to track food or complete workouts. Paige also found the program was incredibly customizable, making it easy to apply Reverse Health to her daily lifestyle. 

We enjoyed that Reverse Health offered inclusive imagery for all body types, so the program felt supportive, according to Paige. “My only comment is that the pictures in the beginning while registering were clearly AI generated, and it would have been more encouraging to see real photos,” she said. That being said, Paige liked that she didn’t feel anything about the app was pressuring or shame-inducing to folks on a weight loss journey. 

“My overall experience with this program was great! I loved the interface and how easy it was to navigate,” Paige added. “I personally liked the food tracking side the most and felt it gave the most data. The exercise portion was best at helping me feel good.”

Best Free Intermittent Fasting App: Zero

Zero

A science-based fasting app

Fortune score

3.75/5

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at Zero

Key product features

• Our thoughts: This app makes it easy to track your fasting windows, monitor progress, and access expert guidance—all for free
• Who it’s for: Anyone interested in intermittent fasting who wants a well-designed, free option that supports their goals
• What makes it different: Zero’s free tier offers more value than most competitors: tracking, stats, and more

Pros and Cons

Pros

• Free version includes robust fasting tools
• Clean, intuitive interface
• Science-backed resources and community support

Cons

• Advanced analytics locked behind premium upgrade
• Limited food and activity tracking
• Fewer personalized insights than paid apps

Our Thoughts on Zero

We chose Zero as the best free intermittent fasting app because it removes barriers to getting started while maintaining a professional, science-driven design. It offers all the essentials—fasting timers, journal, and mood tracking—without pressuring you to upgrade. For professionals who want to explore fasting on their own terms, Zero delivers a streamlined, low-commitment way to get started.

Pete tested the free version of the Zero app for seven days and used it consistently throughout that week. “The app worked well as a fasting timer, but offered limited support for calorie and macronutrient tracking,” he said, rating his experience as a 3.5 out of 5. “Like other fasting apps, Zero starts with an initial questionnaire that helps curate a sustainable fasting plan tailored to your specific needs, but there aren’t any specific calorie or macronutrient recommendations.” 

That said, the free version of Zero offers essentially everything you need to begin your fasting journey, including a fasting timer, educational content, a progress, calorie, and water tracker, a journal, and a variety of different challenges to keep you motivated, according to Pete. 

Although you can’t log specific meals in the Zero app, you can input whether you’ve had a small (under 350 calories), medium (350 to 750 calories), or large (over 750 calories) meal, as well as include the meal composition, making it a bit easier to monitor your intake. This non-specific meal logging can help with focusing on mindful eating without focusing too much on exact calorie amounts. However, this method of food tracking may not be best for beginners, since research has shown that most people cannot accurately estimate the amount of calories in a meal,” Pete said. He rated the app’s recommendations as a 3 out of 5.

“Zero’s program offers community-based accountability without promoting food or body shaming,” Pete said, rating the accountability as a 4 out of 5. Users have the option to join a community Facebook group, which creates a sense of shared accountability and support. 

In addition, the app includes structured Challenges that users can participate in either as timed challenges with a fixed start and end date or rolling challenges that can be joined at any time and repeated. These challenges focus on behaviors like completing a fast or building consistency, rather than appearance or weight, which helps reinforce accountability in a non-shaming way, Pete added. Progress is tracked visually through completion percentages and achievements, and users can review or share completed challenges, further reinforcing motivation.

Best Intermittent Fasting App with Extra Features: DoFasting

DoFasting

Combines fasting timers with personalized meal plans, workouts, and progress tracking

Fortune score

4/5

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at DoFasting

Key product features

• Our thoughts: We like that the app goes beyond the basics of fasting by integrating nutrition and fitness components that support a complete wellness journey
• Who it’s for: Folks seeking a more guided fasting experience with added tools
• What makes it different: DoFasting includes curated meal plans, calorie tracking, water reminders, and a built-in library of workouts

Pros and Cons

Pros

• All-in-one fasting, fitness, and nutrition app
• Offers detailed meal and workout plans
• Visually polished and user-friendly

Cons

• Most features are locked behind paid plan
• Daily notifications may feel excessive
• Occasional syncing issues with wearables

Our Thoughts on DoFasting

We chose DoFasting as the best intermittent fasting app with extra features because it delivers a holistic approach to health. Where many apps only track fasting windows, DoFasting helps users improve their eating habits, stay active, and monitor progress—all on one platform. We love their library of educational articles, workout videos, and step tracking.

Pete tested DoFasting for one week, rating it a 4 out of 5 for his overall experience. It’s a paid app with no free trial available; he used it consistently throughout the week and had a positive experience. “The DoFasting app is intended to make intermittent fasting simple for beginners. The process begins with a short quiz that provides users with a personalized intermittent fasting plan to complement their current lifestyle. Individuals are then encouraged to use a fasting timer, an intermittent fasting meal plan, and their library of recipes and workouts to pursue their health and fitness goals,” he said.

The app’s primary feature is a customizable fasting schedule and timer, but it also includes tracking for calories, water intake, steps, and weight. It offers over 5,000 healthy recipes and multiple online workout programs with video demonstrations. Users can access a library of articles on intermittent fasting, nutrition, and healthy lifestyle habits, helping them understand the science behind fasting to make informed decisions.

“There is no community feature or personalized coaching. The app does integrate with wearables like the Google Fit, FitBit, and Apple Watch, which is nice to have,” Pete said. We think this is a huge bonus when it comes to convenient activity or exercise tracking.

After his testing period, Pete rated the accountability features of the app as a 3 out of 5. “The app offers a variety of fasting plans, meal ideas, and workout routines to support you on your IF journey,” he said. “The educational articles, daily motivational messages, and a progress tracker can all help you stay informed and motivated. Despite a few flaws, I believe this app is worth the investment for those new to fasting. However, experienced fasters seeking additional features or one-on-one coaching might prefer Reverse Health,” Pete said.

Best Intermittent Fasting App with Calorie Tracking: Yazio

Yazio

Yazio combines intermittent fasting with calorie and nutrient tracking in one app

Fortune score

4/5

Check Price

at Yazio

Key product features

• Our thoughts: A smart choice for people who want to understand how fasting fits into their overall diet
• Who it’s for: Professionals who want to pair intermittent fasting with precise calorie tracking to maximize results
• What makes it different: Yazio goes beyond fasting by offering complete nutritional insights, macro tracking, and even recipe suggestions tailored to your goals

Pros and Cons

Pros

• Excellent food and calorie tracking database
• Integrates fasting and diet management seamlessly
• Offers detailed nutritional insights and recipes

Cons

• Free version has limited tracking options
• Occasional overlap of data between fasting and calorie logs
• Some features require manual input for accuracy

Our Thoughts on Yazio

We chose Yazio as the best intermittent fasting app with calorie tracking because it bridges the gap between fasting and everyday nutrition. For professionals who prefer a data-driven approach, it provides a clear picture of progress—combining meal logging, fasting schedules, and nutrient tracking in one place. Yazio’s balance of structure and insight makes it ideal for those who enjoy measurable results without having to use multiple apps.

Pete used the free version of the Yazio app for seven days to track his calories and macros, logging his meals and water intake consistently throughout the week. “The app was intuitive to use, and overall I had a positive experience: it did exactly what I needed it to do,” he said, rating his experience as a 4 out of 5. 

Yazio begins with a brief quiz about your dietary habits, activity level, and goals. The app then generates calorie and macronutrient targets that, according to Pete, felt accurate for his needs. “You can adjust the targets at any time or enter custom numbers if you are working with a nutrition coach. I found this especially helpful, because Yazio allows very precise adjustments. Just a heads up that the free version of the app doesn’t include access to its recipe guides. It functions primarily as a calorie-counting and fasting tool,” Pete said.

The app doesn’t offer any community features or personalized coaching, so Pete rated the accountability as just a 2 out of 5. However, if you’re looking for a straightforward, precise calorie tracker, this is a great option.

“If you decide to take advantage of the Pro version of the app, then you will have access to several additional and upgraded features,” Pete said. “Yazio Pro offers personalized meal recommendations and thousands of recipes from a vast food database. It also includes a smart food rating system that provides consumers with a detailed nutritional analysis of their daily food choices. This rating system helps individuals learn more about which foods have higher nutritional values than others and allows users to better decide which foods they should be incorporating into their diets or potentially avoiding altogether.”

Before trying out Yazio, Pete had been a long-time user of MyFitnessPal, which offers many of the same core calorie-counting features. Comparing the two, Yazio was Pete’s winner. Yazio’s recipe database (Yazio Pro version) sets it apart from other calorie-counting apps, he said. “The app also allows you to import recipes directly into your in-app grocery list, which automatically breaks down the exact ingredients and quantities you need to buy. This feature makes it much easier to plan meals for the week, shop efficiently, and learn how to cook healthy, delicious dishes,” Pete said.

Overall, he thinks Yazio is a top-tier calorie-counting app, especially if you take advantage of the first-time user offer and access YAZIO Pro for less than $4 per month for the entire year.

How We Tested and Selected the Best Intermittent Fasting Apps

Each app was evaluated for everyday usability, habit support, and overall impact on a healthy fasting routine.

Functionality and Ease of Use

Functionality and ease of use included how simple it is to set up fasting schedules, start and stop fasts, and log basics like water, movement, and mood. Apps that offered intuitive interfaces, clear visuals (like timelines or countdowns), and minimal friction for logging and editing entries were rated more favorably than those that felt cluttered or confusing.

Accountability

Accountability focused on how well an app helps users stick with their fasting plan through reminders, streaks, coaching, or community features. Apps scored higher when they provided well‑timed notifications, goal check‑ins, optional human or AI coaching, or in‑app communities that could help users stay on track during harder days, rather than leaving them to self‑manage entirely.

Sustainability

Sustainability looked at whether an app supports fasting in a realistic way over the long term. This included flexibility to adjust fasting windows, tools for handling social events or schedule changes, and educational content that encourages listening to hunger cues and avoiding extreme restriction. Apps that made it easy to adapt fasting around real life—not just “perfect” weeks—were prioritized.

Tracking

Tracking included how the app records and displays key data such as fasting windows, eating windows, weight, basic biometrics, and sometimes mood or sleep. Apps that presented progress clearly with charts, trends, and simple summaries while avoiding overwhelming data dumps were favored, as this helps users see patterns and adjust without getting lost in numbers.

Value

Value reflects how well an app’s price aligns with its features, support, and overall usefulness. The evaluation weighed subscription cost against the quality of tracking tools, coaching options, education, and long‑term habit support, highlighting apps that provide strong everyday utility and meaningful guidance—not just the lowest price, but the best overall value for what you get.

How to Find the Best Intermittent Fasting Apps

Choosing an intermittent fasting app is personal, and the best fit depends on your health, goals, and tech preferences. Thinking through a few key questions first can quickly narrow your options.

Your Fitness Goals

Different people use intermittent fasting for different reasons: fat loss, muscle maintenance, metabolic health, performance, or appetite control. An endurance athlete, for example, may need more flexibility around long training days than someone with a primarily sedentary routine, and someone managing a medical condition may want to be in close contact with their doctor. Because fasting changes meal timing and sometimes medication timing, it is important to talk with your doctor or another healthcare professional before starting or significantly changing any fasting plan, especially if you have chronic conditions, take regular medications, or are pregnant or breastfeeding.

Support System

Some folks stay more consistent when they feel supported—through in‑app groups, discussion boards, challenges, or sharing progress with friends and family. Others prefer a quieter, more private experience and find constant social features distracting or stressful. When you compare apps, pay attention to whether they offer community, coaching, or social sharing, and decide if that kind of connection will motivate you or be unnecessary for your day to day.

Accountability

Accountability features can range from simple reminders and streaks to chat‑based coaching and regular goal reviews. If you tend to fall off plans without external check‑ins, an app with structured prompts, goal‑setting flows, or optional coaching may be worth prioritizing. If you are self‑directed and mostly need a timer and a log, you may prefer a lighter‑touch app without extra nudges.

Device Compatibility

It is important that your chosen fasting app works smoothly with your phone, watch, and any other devices you rely on. Some fasting apps sync with wearables for steps, heart rate, or sleep, while others are more standalone. Before committing, check that the app supports your operating system, integrates with your preferred health platforms where relevant, and has an interface you find easy to navigate.

Progress Tracking

Intermittent fasting apps can track progress in many ways, including fasting streaks, weight, measurements, photos, mood, or sleep. Some people enjoy detailed metrics and visual charts, while others find frequent weigh‑ins or photos discouraging or triggering. It helps to choose tracking methods that feel respectful and motivating; choose an app that helps you notice patterns and celebrate progress.

Price

Fasting apps range from free, ad‑supported tools to premium subscriptions with education and coaching. Think about how often you will use the app, which features actually matter to you (timers, logs, courses, coaching), and whether a subscription price feels reasonable for your budget. The best fasting app is not necessarily the cheapest or the most expensive, but the one where the features you will truly use match the cost.

Benefits of Weight Loss Programs

Weight loss programs and apps, including fasting tools, can provide benefits that go far beyond the number on the scale. They create:

• A clear framework that cuts down on daily decisions about when and what to eat
• Practical guidance on nutrition and habits that you can keep using over time
• Reminders and support features that help you stay on track when motivation is low
• Progress dashboards that let you monitor results and fine‑tune your plan instead of guessing

Additionally, protein can play a surprisingly important role in making intermittent fasting work well. Breaking your fast with a quality protein powder helps stabilize blood sugar, supports muscle maintenance, and keeps you fuller for longer, which can make it easier to stick to your eating window. 

A daily multivitamin can also be helpful when you are eating within a shorter window, since there is less time to cover all your micronutrient bases through food alone. While supplements are not a replacement for a varied, nutrient-dense diet, combining intermittent fasting with an appropriate protein powder and a quality multivitamin can add a layer of nutritional “insurance” that supports energy, recovery, and overall health during your fasting journey.

Frequently asked questions