Best Fasting Timer App in 2026

Quick Answer: Every major fasting app has a reliable timer. The real question is what surrounds it. Fasted pairs its timer with six daily windows from 12:12 to one meal a day, four extended lengths up to 72 hours, metabolic phases, streaks and detailed stats — and no food log at all. Zero offers a clean timer with educational content and a real food tracker. Simple adds AI coaching. The best fasting timer is the one embedded in an app you will actually use daily.

A fasting timer is the most basic feature a fasting app can offer. Tap a button, watch a countdown, get a notification. Every app in the market does this correctly in 2026. If all you need is a timer, you could use your phone's built-in clock app, or the free web fasting timer on this site, which runs in the browser and shows your metabolic phases updating live.

Where timers do still differ is where you can reach them from. A timer on your wrist is a different daily experience from one three taps into an app, and most fasting apps do not have a real watch app at all — the Apple Watch comparison shows how to tell from the store page which ones do.

The real value of a fasting timer app comes from what it does beyond counting down. This guide compares the best fasting timer apps based on the complete experience, not just the countdown itself.

What Makes a Good Fasting Timer?

Before comparing apps, it helps to understand what separates a good timer experience from a mediocre one:

Reliability. The timer should work in the background without draining your battery. Notifications should arrive on time. The app should not lose your progress if it gets killed by the OS.

Schedule support. A timer that only handles one protocol limits you. The best timers work seamlessly with multiple fasting schedules, from 12:12 up through 16:8 to one meal a day. Weekly patterns like 5:2 are a separate question: most timer apps, this one included, are built around a daily window and do not run them at all.

Visual clarity. You should be able to glance at the timer and instantly know how far along you are, and ideally what that hour means metabolically. Progress indicators, remaining time, and current state (fasting vs eating) should be immediately obvious.

Connected tracking. A timer that feeds into stats, streaks, and insights transforms a simple countdown into meaningful data. A standalone timer does not.

For a deeper look at features beyond the timer, read our fasting app features guide.

The Best Fasting Timer Apps

1. Fasted

Fasted's timer is clean and immediately visible when you open the app. A circular progress indicator shows your fasting progress, remaining time is displayed prominently, and starting or ending a fast takes a single tap.

What sets Fasted apart is what the timer connects to. Every completed fast feeds into your streak count, your weekly and monthly stats, and your overall fasting history. Weight tracking sits in Pro and connects the fast to an outcome you can see. What it does not connect to is a plate: Fasted does not log food at any tier, and the nearest thing it has is a once-a-day note of your protein and fibre in grams.

The timer covers six daily windows — 12:12, 14:10, 16:8, 18:6, 20:4 and 23:1 for one meal a day — plus 24, 36, 48 and 72-hour fasts, and switching between them does not disrupt your tracking history. Weekly patterns such as 5:2 and alternate-day fasting are not in there; they are a different shape of protocol and Fasted does not run them.

Timer experience: Fast, clear, connected to meaningful stats.

2. Zero

Zero's timer is one of the most recognizable in the fasting app space. The dark-themed circular display has become iconic. It is visually appealing and functionally solid. Timer notifications are reliable, and the interface is intuitive.

Zero's timer connects to basic fasting stats in the free version and more detailed insights with Zero Plus. The educational content that accompanies the timer experience adds context that some users find motivating.

Timer experience: Polished, well-known design with good educational content alongside.

3. Simple

Simple wraps its timer in AI coaching prompts. The timer itself works well, but the experience includes check-ins, recommendations, and encouragement from the AI coach. For some users, this adds value. For others, it adds friction between opening the app and seeing their timer.

Timer experience: Functional timer enhanced (or interrupted, depending on preference) by AI coaching.

4. BodyFast

BodyFast integrates its timer into the weekly plan view when using the Coach feature. The timer shows your current fasting window within the context of your planned week. This works well for people who follow structured weekly plans but can feel overly complex for people who just want a simple countdown.

Timer experience: Plan-oriented timer that emphasizes weekly structure.

5. Fastic

Fastic's timer is visually engaging with illustrations and progress animations. The social feed and community features surround the timer experience, making it feel like part of a larger platform. The timer is reliable and the visual design is appealing.

Timer experience: Visually rich, embedded in a social and lifestyle platform.

6. Life Fasting Tracker

The timer itself is simple and reliable. The design is more basic than newer competitors but fully functional.

Timer experience: Simple and reliable, enhanced by group visibility.

7. Fastient

Fastient is a lesser-known option that focuses on journaling alongside fasting. The timer is basic but functional, and the journaling feature lets you record thoughts and feelings during your fast. For reflective fasters, this combination is unique.

Timer experience: Basic timer with integrated journaling.

Timer Feature Comparison

Beyond the Timer: What Actually Matters

A fasting timer alone is commodity software. What transforms it into a valuable tool is the ecosystem around it.

Streak tracking turns each completed fast into a link in a chain. Missing one day breaks the chain, which creates daily motivation to keep going. Fasted is the only major app that prominently features streak tracking.

Weight integration connects your fasting to measurable outcomes. Seeing that your weight trends downward during weeks of consistent fasting validates your approach.

Meal logging closes the loop between fasting timing and nutrition. What you eat matters alongside when you eat, and an app that records both gives you a fuller picture. Zero, Simple and Fastic each take a run at it. Fasted does not, and says so: it tracks the fast and leaves the plate alone.

Detailed stats reveal patterns you would miss by just watching a timer. Average fasting duration, consistency rates, and weekly trends help you optimize.

For guidance on starting your fasting practice, see our how to start fasting guide.

Free Timer Options

If you genuinely only need a timer and nothing else, several options exist:

• Your phone's clock. Set a timer for your fasting window. Free and always available.
• Fasted free tier. Timer plus basic tracking and multiple schedules at no cost.
• Zero free tier. Timer plus educational content.
• Life. Timer plus fasting circles, mostly free.

But if you are reading an article about the best fasting timer app, you probably want more than just a countdown. The investment in a proper fasting app, even at the free tier, pays off in consistency and insight.

The Best Timer for Different Needs

Best overall timer experience: Fasted. Clean design, connected to streaks and stats, and it covers every daily window from 12:12 to one meal a day plus the extended fasts above them.

Best timer with education: Zero. The content library adds context and knowledge alongside the timer.

Best timer with coaching: Simple. AI guidance wraps around the timer for personalized support.

Best timer for groups: Life. Fasting circles let your group see your active fasts in real time.

Best timer with community: Fastic. Social feed and challenges surround the timer experience.

For the complete app comparison beyond just timers, see our best fasting app roundup.

Frequently Asked Questions

Do I need a fasting timer app?

You do not strictly need one. People fasted successfully before apps existed. But a dedicated timer app adds structure, accountability, and tracking that make it easier to stay consistent. The timer itself is simple; the value is in the tracking ecosystem it enables.

Are all fasting timers basically the same?

The countdown function is essentially the same across all apps. The differences are in what surrounds the timer: schedule support, stats integration, tracking features, design quality, and connected tools like weight and meal logging. These surrounding features are what you are actually choosing between.

Can I use my phone's built-in timer for fasting?

Yes, but you lose all the benefits of dedicated fasting tracking: schedule management, history, stats, streak tracking, and insights. A phone timer tells you when your fast ends. A fasting app tells you how your fasting practice is going over weeks and months.

What is the best free fasting timer?

Fasted's free tier offers the most complete experience among free fasting timers, including multiple schedules and basic tracking. Zero's free tier is also good, particularly if you value educational content. Life is mostly free and adds group fasting features.

How accurate are fasting timer notifications?

All major fasting apps deliver notifications within a few minutes of your target time. Slight delays can occur due to phone OS notification management, particularly on Android with aggressive battery optimization. This is a phone issue, not an app issue, and can usually be resolved in your phone's settings.

What to Read Next

• Best Intermittent Fasting App in 2026
• How to Start Intermittent Fasting