# 3-Day Fast - 72h Water Fast — Autophagy Timer & Tracker > 72-hour water fast tracker with phase monitoring, supplement guide, and refeeding advice. (iPhone/iPad app by Tomasz Mikolajewicz.) - Source: https://appshunter.io/ios/app/3-day-fast-72h-water-fast/id6767336278 (this page in markdown: same URL + `.md`) - Developer: [Tomasz Mikolajewicz](https://appshunter.io/developer/1896465828) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 4.50/5 from 2 App Store ratings - Age rating: 12+ - Requires: iOS 13.0 · 39 MB - Languages: American English, Croatian, German (Germany), Polish, Brazilian Portuguese, European Spanish - Released: 2026-07-04 - Data updated: 2026-08-31 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/3-day-fast-72h-water-fast/id6767336278/reviews.md ## What is 3? The only app built specifically for 72-hour water fasts. Track 8 science-backed fasting phases in real-time — from fed state to deep autophagy. Know exactly what's happening in your body, which supplements are safe, and how to break your fast properly. REAL-TIME PHASE TRACKING Watch your body transition through 8 distinct phases — from fed state to deep autophagy. Know exactly what's happening at every hour. Each phase shows you the science-backed changes occurring in your body right now. SUPPLEMENT GUIDE Know what's safe to take during your fast (magnesium, electrolytes, creatine) and what breaks your fast (collagen, BCAAs). No more guessing. MILESTONE CELEBRATIONS Hit 24h, 48h, and 72h markers with visual celebrations. See your journey timeline and know what benefits you're unlocking at each stage. REFEEDING GUIDE How you break your fast matters as much as the fast itself. Get clear guidance on what to eat, what to avoid, and how to ease back into food safely. LEARN AS YOU FAST Built-in guides cover everything: Why 72 hours? When does autophagy start? Day-by-day breakdown. Safety information. All backed by current research. PRO FEATURES (one-time purchase, no subscription) - All 8 fasting phases with detailed guidance - Badges and achievements - Cloud sync across devices - Box breathing exercise for hunger cravings Whether you're attempting your first 72-hour fast or you're an experienced faster, 3-Day Fast gives you the knowledge and tools to fast safely and effectively. Safety Notice: Extended fasting can affect blood sugar, blood pressure, and electrolyte balance. Consult a healthcare provider before fasting, especially if you have medical conditions, take medications, or have a history of eating disorders. This app does not provide medical advice. ## Key features - Real-time tracking of 8 fasting phases - Science-backed autophagy progression - Supplement safety guide - Milestone celebrations - Refeeding guidance - Built-in educational guides ## Frequently asked questions about 3 ### What is the main purpose of 3-Day Fast? 3-Day Fast is designed to help users successfully complete 72-hour water fasts. It provides real-time tracking of fasting phases, guidance on supplements, and advice on how to break your fast safely. ### Does 3-Day Fast offer a free trial? The app is free to download and use. Pro features, which include all 8 fasting phases with detailed guidance, badges, cloud sync, and a box breathing exercise, are available as a one-time purchase, not a subscription. ### What are the 'Pro Features' in 3-Day Fast? Pro features are unlocked with a one-time purchase and include detailed guidance for all 8 fasting phases, badges and achievements, cloud sync across devices, and a box breathing exercise to manage hunger cravings. ### How does 3-Day Fast track fasting phases? The app tracks 8 distinct science-backed fasting phases in real-time, from the fed state to deep autophagy. It informs you about the specific physiological changes occurring in your body at each hour of the fast. ### Can I use 3-Day Fast on my Android device? Currently, 3-Day Fast is supported on iPhone and iPod devices. Information regarding Android compatibility is not available in the provided data. ### What is the update frequency for 3-Day Fast? The app was last updated on August 10, 2026, indicating recent development activity. The version history shows updates are released to improve functionality and add features. ### Does 3-Day Fast have ads? No, 3-Day Fast does not contain advertisements. The app offers a clean user experience without interruptions from ads. ### What age rating does 3-Day Fast have? 3-Day Fast has an age rating of 12+. This suggests the content is generally suitable for users aged 12 and older. ## Version history (last 5 releases) ### 1.1.4 — 2026-08-25 • The supplements guide now covers vegetable broth, and explains the trade-offs of bone broth during a fast • Refeed timings now say clearly that they count from the end of the fast • Finished ideas on the ideas board show which version delivered them • Small improvements ### 1.1.3 — 2026-08-20 • Share your progress as a picture - the ring, the phases you reached and how long you fasted • The timer keeps counting past 72 hours, with a new Beyond 72 phase • Badges show where you are in the fast you are running and how often you earned each one • New artwork for the 72 hour badge • Set your start time up to five days back • Developer replies on the ideas board, plus a new Settings screen ### 1.1.2 — 2026-08-19 • The timer keeps counting past 72 hours - finish whenever you are ready • New Beyond 72 phase explains what happens after the three days • Set your start time up to five days back • Replies from the developer now show on the Feature Ideas board • New Settings screen and a tidier More tab ### 1.1.1 — 2026-08-17 • New: push notifications keep you posted during your fast • Journal notes save reliably again • Tips and symptom cards stay open and scroll into view • Cleaner More tab • Small fixes and improvements ### 1.1.0 — 2026-08-15 • Refreshed end-of-fast screen • Set a custom time on journal notes • More guides to read in the app • Small fixes and improvements ## Related topics [h2 flow water fasting](https://appshunter.io/ios/topics/h2-flow-water-fasting) · [my body fast](https://appshunter.io/ios/topics/my-body-fast) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*