Fastio / Intermittent Fasting

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Everyone
10+
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Everyone
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About this app

DISCOVER THE POWER OF INTERMITTENT FASTING WITH FASTIO – YOUR SCIENCE-BASED FASTING COMPANION!

Intermittent fasting is more than just a diet: it is one of the most effective ways to burn fat sustainably, activate cellular renewal, and boost your energy levels. With Fastio, you get the absolute best out of your fasting journey – simple, precise, flexible, and privacy-focused.

YOUR HEALTH IN FOCUS: WHAT HAPPENS INSIDE YOUR BODY?

Fastio accompanies you live through the biological phases of fasting, showing you exactly what is happening inside your body:
• Fat Burning & Insulin Levels (4–16 hrs): Your insulin levels drop. The body switches from glycogen stores to burning fat reserves.
• Ketosis (16–24 hrs): Carbohydrate stores are depleted. Ketone bodies supply your brain with clear energy – without energy crashes.
• Autophagy & Cellular Renewal (24+ hrs): Your body activates its internal recycling system. Damaged cellular components are broken down, and the immune system regenerates.

With Fastio’s visual Metabolic Phase Tracker, you’ll understand your metabolism and stay motivated every single day!

FASTIO’S UNIQUE FEATURE: PROFESSIONAL PDF REPORTS

While other fasting apps stop at basic charts, Fastio takes crucial steps further by generating highly precise, structured PDF reports tailored for two distinct use cases:

The Private Progress Report:
Your personal fasting diary as a PDF. Keep track of fasting times, calorie intake, water consumption, progress photos, weight trends, and streaks at a glance – perfect for documenting your achievements.


The Medical Data Report (Doctor's Report):
Prepare your health data optimally for your next doctor's visit! This report summarizes your recorded vital signs and fasting logs in a structured layout:
• Trends in blood sugar (mg/dL), ketones (mmol/L), and uric acid (mg/dL)
• Detailed fasting logs, weight, and BMI progress
• Documented meals & nutritional trends
(Important Note: The report does not provide a medical diagnosis, but offers your doctor valuable, structured real-time data as a foundation for personalized treatment).


ALL TOP FEATURES OF FASTIO AT A GLANCE:

• Flexible Fasting Plans: 16:8, 18:6, 20:4, 23:1 (OMAD), ADF, or fully customizable plans.
• Smart Fasting Timer: Features home screen widgets (iOS/Android), retroactive start time adjustment, and reminders.
• Photo Journal & Progress Comparison: Capture your physical progress with personal photos and visually track your personal goals.
• Meal & Calorie Tracker: Includes a barcode scanner and direct integration with USDA FoodData & Open Food Facts.
• Vitals & Health Tracker: Log weight, blood sugar, ketones, and uric acid with reference value explanations.
• Milestones & Streaks: Reach your goals with smart notifications and progress displays.
• 100% Data Privacy & Offline Support: Your data belongs to YOU! Usable without an account, local storage & backups (JSON/CSV).

FUTURE-PROOF & CONTINUOUSLY IMPROVING

This is just the beginning! Fastio is constantly evolving. Many more exciting features are planned for the future to enhance your fasting and health journey – stay tuned for what’s coming next!

WHY CHOOSE FASTIO OVER OTHER FASTING APPS?

No subscription forced for core functions, no opaque algorithms – just an honest, scientifically oriented app. Whether you want to lose weight, trigger autophagy, track visual progress, or prepare metabolic data for your doctor – Fastio is your reliable companion.

Download Fastio now and start your journey toward better health, vitality, and body awareness!
Intermittent fasting tracker with health data and personalized reports.
Updated on
Sep 15, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

Added a local AI model for meal recognition.
AI can now recognize meals from photos and help estimate their nutritional information.
Improved app stability and fixed minor bugs.
Content rating
Everyone
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App support

About the developer
Krzysztof Kajzar
ch.kajzar@gmail.com
95 MOO 8 Tambon Sraphadu, Auphor Wichianburi, Phetchabun Phetchabun เพชรบูรณ์ 67130 Thailand

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