Fasting timer with phases
Pick your rhythm from 12:12 to 20:4 or start an extended fast of 24 hours or more. Fibi shows you which fasting phase you’re in – and can start the timer for you automatically.
Fasting that’s fun.
Hi, I’m Fibi! I’m with you for intermittent and extended fasting – with a timer, calories by photo and lots of good vibes. In 2 minutes, we’ll build your personal plan together.
- Timer
- Photo tracking
- Streaks
Coming soon to theApp Store
For iPhone · In English · No ads
Features
Fibi can do quite a lot
From your first 16:8 to an extended fast: timer, food, water, medications and how you feel – all in one app.
Live Activity & widgets
Your fast runs live on the Lock Screen and in the Dynamic Island. Widgets on your Home Screen and Lock Screen show your timer and your streak. Go on, tap the island!
Calories by photo, voice or text
Snap your plate, tell Fibi what you ate, or type it in. The AI estimates calories and nutrients. Rather skip the AI? Then just log it yourself.
FastingFibinowYou did it! Your 16-hour fast is over 🏁- FastingFibi8:00 PMYour fasting window is about to start ⏰
- FastingFibiyesterdayYour streak is at risk – keep it going 🔥
Reminders that count
Fast start, fast end, your streak: Fibi only checks in when it matters. You can adjust your reminders in Settings anytime.
Water & more
Log water, tea, black coffee, broth or electrolytes with one tap and keep an eye on your daily goal.
Medications
Reminders and a dose log. Fibi lets you know when a dose falls in your fasting window. The data stays on your iPhone only.
Body signals
Track energy, hunger, focus and weakness on a scale of 1 to 5 and see how they change over time.
Journal
Mood, weight, notes and tags like sleep or training – your fasting days at a glance.
Stats & streaks
Fasting hours, longest fast, success rate and your streak. Rest days from your weekly plan don’t break it.
Weekly plan
Set your fasting, tracking and free days. If you like, the timer starts automatically at the right time.
Apple Health
If you like, FastingFibi takes your weight from the Health app and adds new entries there.
Community
Fast together in groups and show you’re in with “I’m fasting now”. Optional and only with an account.
Your data stays with you
FastingFibi stores your health data primarily on your iPhone. With an account, it’s also transferred in encrypted form and stored in the EU (Frankfurt) – medications always stay on your device only. No ads, no selling of your data. Read the privacy policy
How it works
Ready in three steps
Fibi asks you a few quick questions and builds your plan from your answers. Go ahead, give Fibi a tap.
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Tell me about you! 📏
Build your plan
Age, height, weight and goal: in about 2 minutes, Fibi builds your personal plan with you.
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16:8? The classic 😴
Pick your rhythm
Choose when you fast and on which days. Fibi reminds you when it’s time – or starts the timer for you.
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Your streak is on! 🔥
Let’s go
Start the timer, log food by photo, track your water – and watch your streak grow.
Will you promise me something? 🤞
Safety
A quick word on safety
Intermittent fasting isn’t suitable for everyone. FastingFibi doesn’t replace medical advice, diagnosis or treatment.
Not suitable if any of these apply
- Pregnancy and nursing
- Eating disorders (including in the past)
- Underweight (BMI below 18.5)
- Diabetes, especially type 1, or insulin therapy
- Cardiovascular disease or heart rhythm disorders
- Taking certain medications
- Children and teenagers under 18
If you have health questions or take medication: check with a doctor before you start. Stop a fast if you feel unwell.
You fast at your own risk. More in our Terms of Use.
What does FastingFibi cost?
After onboarding, you unlock FastingFibi with a subscription that you take out through the App Store. We’re planning a monthly and a yearly plan. Prices will follow at launch.
Whether there’s a free trial and exactly what the subscription costs, you’ll see in the app before you buy. The price in Apple’s purchase dialog always applies. You can cancel anytime in your Apple ID settings.
When will the app be released?
FastingFibi is coming soon to the App Store – for iPhone at launch. Until then, you can reach us at [email protected].
Which types of fasting does Fibi support?
Intermittent fasting with 12 to 20 hours of fasting, for example 16:8, and extended fasting of 24 hours or more, over several days. For long fasts, there are presets and an introduction that Fibi shows you the first time.
Fasting for more than 72 hours is only for experienced fasters and should be cleared with a doctor first.
Do I need an account?
No. You only need a free account if you want to back up your data in the cloud, use FastingFibi on several devices or join the community.
Where is my data stored?
FastingFibi stores your health data primarily on your iPhone. With an account, it’s also transferred in encrypted form and stored in the EU (Frankfurt). Medications always stay on your device only.
You’ll find all the details in the privacy policy.
How does recognition by photo, voice or text work?
When you log a meal by photo, voice recording or description, an AI (Google Gemini) estimates the foods and nutrients. This only happens after you’ve expressly agreed in the app. You can withdraw your consent anytime in Settings under “AI analysis”.
The values are estimates. You can always log everything yourself, without AI.
Is fasting right for me?
Not for everyone. Please read the safety notes and talk to your doctor first if you have a health condition, take medication, are pregnant or nursing, or have an eating disorder. FastingFibi is for adults aged 18 and over.
How do I cancel my subscription or delete my account?
Cancel your subscription in your Apple ID settings under “Subscriptions” or in the app under Settings → Subscription. Delete your account in the app under Settings → Data. You’ll find step-by-step instructions on the support page.
Fibi can’t wait to meet you
FastingFibi is coming soon to the App Store. Questions, ideas or feedback? Write to us – Fibi reads along.
Coming soon to theApp Store
