Best Fasting App (2026): 9 Intermittent Fasting Apps Compared

Intermittent fasting means eating within a set window and not eating outside it, such as eating between late morning and early evening and fasting overnight. A fasting app times the window, reminds you when it opens and closes, and shows your streaks so you can see how it's going.

The nine apps below are listed alphabetically and in no particular order, from simple timers to coaching apps that add meals, water and activity. Each description comes from the app's own website or store listing, re-checked today. If you use AI to plan meals, my guide to ChatGPT prompts for weight loss goals pairs well with a fasting timer.

Fasting apps at a glance

In the free plan column, Yes means the app's own site or store listing describes a free app or free version, Trial only means a time-limited trial and No means neither is stated. Free versions usually include a timer, with plans, coaching or detailed stats in the subscription.

Tool	Type	Good for	Free plan
BodyFast	Fasting coach app	Weekly plans that change	Yes
DoFasting	Fasting and meals app	Fasting plus meal ideas	Yes
Fastic	Fasting and food tracker	Friendly prompts and challenges	Yes
Fastient	Fasting journal	Simple log with notes	Yes
Lasta	Wellness programme	Habits beyond the fasting clock	Trial only
LIFE Fasting Tracker	Social fasting tracker	Fasting with friends	Yes
Simple	Coaching app	Coaching on top of fasting	Yes
Yazio	Fasting in a food diary	Fasting and food logging together	Yes
Zero	Fasting tracker	Clean timer with learning content	Yes

Nine intermittent fasting apps

BodyFast

Best for: Routine breakers who get bored of one schedule and want a coach that varies their fasting plan week to week.

DoFasting

Best for: Beginners who want a fasting timer alongside meal ideas and simple workouts in one place.

Fastic

Best for: Newcomers who like a cheerful app with challenges, water reminders and a fasting buddy feature.

Fastient

Best for: Minimalists who want a plain timer and a journal to note how they felt during each fast.

Lasta

Best for: Anyone who wants fasting folded into a wider programme on eating habits, mindset and activity.

LIFE Fasting Tracker

Best for: Fasters who stay motivated by fasting alongside friends in circles and seeing each other's progress.

Simple

Best for: Dieters who want an AI coach to nudge meals, water and activity as well as time the fast.

Yazio

Best for: Users who already log food in this app and want fasting windows tracked in the same place.

Zero

Best for: People who want a clean fasting timer with articles and protein tracking on the side.

What the research says, and doesn't

Fasting apps can sound more certain than the science. The National Institute on Aging (NIA) says more research is needed to determine whether intermittent fasting yields benefits or is even feasible for humans over the long term, and suggests a gradual, phased-in schedule with a dietitian or nutritionist.

What that means for you: start with a gentle window, such as a longer overnight gap, and lengthen it slowly. If you're pregnant, diabetic, underweight or take medication, check with your doctor first.

Timers, food trackers or coaching apps?

Plain timers just count the fast and show your history, which is all many people need. Food-and-fasting apps add meal logging so you can see what you eat in your window. Coaching apps wrap fasting into a wider plan with lessons, water reminders and activity goals.

If you already log food in another app, a plain timer may be enough; if you want guidance, a coaching app will feel more supportive.

Starting intermittent fasting gently

1. Pick a window that fits your sleep, such as finishing dinner earlier.
2. Start with a short fast and add time week by week.
3. Drink water through the fasting window.
4. Plan balanced meals for your eating window.
5. Note how you feel each day in the app.
6. Stop and seek advice if you feel unwell or dizzy.

Signs fasting isn't working for you

• Constant hunger and irritability. Your window may be too long.
• Overeating when the window opens. Try a gentler schedule.
• Poor sleep. Finishing dinner very early can leave some people restless.
• Feeling faint or dizzy. Stop and get medical advice.

Fitting fasting around family life

Shared meals matter, so build your window around them rather than eating alone. Many people move breakfast later instead of skipping dinner with family. Tell the people you live with what you're doing, and be flexible on birthdays and holidays; one late meal won't undo anything. Keep your evening routine the same where you can, because a steady bedtime makes the overnight part of a fast much easier. If you track your progress in a wider programme, my look at how HealthyWage works explains one way people add a goal.

Do you make a fasting app? Tool makers can ask to be considered for a featured place on this list.

My plain advice on choosing a fasting app

Choose the simplest app that gives you what you need. A timer and reminders are the core; extras like meal plans and challenges are only worth it if they keep you going. Too many notifications can make fasting feel like a chore.

And let the app support your routine rather than set it. Fasting should fit around your life, not take it over. A window that fits your sleep and family meals is the one you'll keep, which matters far more than chasing longer fasts because an app shows a streak.

Frequently asked questions

What is the best intermittent fasting app?

The best one matches your schedule and needs: a simple timer for many people, a coaching app if you want more guidance.

Are fasting apps free?

Most have a free app or version with a timer; plans and coaching are usually in a subscription.

Is intermittent fasting safe?

It isn't right for everyone. Check with your doctor if you're pregnant, diabetic, underweight or take medication.

How long should I fast as a beginner?

Start with a short overnight fast and extend it gradually, as the National Institute on Aging suggests a phased-in schedule.

Can I drink water while fasting?

Yes. Most fasting plans encourage water during the fasting window.

Do fasting apps track food too?

Some do, logging meals in your eating window; others are timers only.