Comparison

72Hour Fasting Timer vs Autophagy Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

72Hour Fasting Timer

This app assists users in tracking extended fasting periods of 24, 48, or 72 hours. It provides progress zones, statistics, and reminders to help users stay focused and motivated during their fasting journey.

Highlights
  • Smart fasting timer
  • Progress zones (fat burning, autophagy)
  • Statistics and history
  • HealthKit sync
  • Notifications and reminders
  • Minimalist design
Features
Read full description

Fasting Timer 72 is your personal companion for extended fasts (24h, 48h, 72h). Whether you're doing intermittent fasting, OMAD, or long-term fasting, this app helps you track progress, stay focused, and stay motivated. Features: - Smart fasting timer - Progress zones (fat burning, autophagy, etc.) - Statistics and history - HealthKit sync (optional) - Notifications and reminders - Minimalist design. No ads. Just fasting — tracked right.

About

Autophagy Tracker

Features
Read full description

Autophagy is a minimalist fasting timer that tracks your body's metabolic phases in real time — from digestion through glycogen depletion to autophagy and beyond. SCIENCE-BASED FASTING PHASES Follow your progress through 7 distinct metabolic phases, each backed by research: • 0–4h: Digestion — insulin active, nutrient absorption • 4–12h: Glycogen depletion — blood sugar stabilizes, insulin drops • 12–16h: Fat burning — glycogen depleted, switching to fat • 16–24h: Early autophagy — cellular cleansing begins, growth hormone rises • 24–48h: Active autophagy — significant cell cleansing, deep ketosis • 48–72h: Peak autophagy — immune system renewal, IGF-1 drops • 72h+: Deep autophagy — advanced cell regeneration REAL-TIME TIMELINE See exactly where you are in the fasting process. Each phase shows key biological processes, active markers, and how far you've progressed. Completed phases are marked, upcoming ones give you something to work toward. FLEXIBLE START Start fasting now or set a custom time for when your last meal was — the timer adjusts automatically. OPTIONAL GOALS Set a target duration to see your remaining time and track goal completion in your history. FASTING HISTORY & STREAKS Review past fasts with duration, phase reached, and goal status. Track your current and longest streaks to stay motivated. APPLE WATCH A full companion app for your wrist. Track your fast, see your current phase, and stop your timer — all without reaching for your phone. NOTIFICATIONS Choose between no notifications, reduced (start and end only), or all phase transition alerts. Stay informed without being overwhelmed. EXTENDED MODE Continue tracking beyond 72 hours for advanced fasting protocols. PRIVACY FIRST All data stays on your device. No accounts, no cloud sync, no tracking. Autophagy was inspired by Nobel Prize-winning research on cellular self-renewal. The app is designed with a Dieter Rams-inspired aesthetic: minimal, typographic, and functional — so you can focus entirely on your fast.

Screenshots

72Hour Fasting Timer4 screens
Autophagy Tracker4 screens

Verdict

The call

The clearest difference is price: Autophagy Tracker at Free against 72Hour Fasting Timer's $1.99. Autophagy Tracker also leads on update cadence (every 3 days vs every 7 months). 72Hour Fasting Timer's advantage is iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Autophagy Tracker is free to download; 72Hour Fasting Timer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

72Hour Fasting Timer ships an update every 7 months, Autophagy Tracker every 3 days. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
72Hour Fasting Timer versus Autophagy Tracker: the parameters behind the verdict, then further details
Parameter72Hour Fasting TimerAutophagy Tracker
Price$1.99Free — better
Rating4.3 (3 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings3 — better—
Update frequencyEvery 7 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS14.0 — better17.0
Further details — not scored
Size5 MB2 MB
Age rating17+4+
DeveloperPOWER SATELLITE LLCtva Pte. Ltd.

In-app purchases

None

72Hour Fasting Timer

No in-app purchases

None

Autophagy Tracker

No in-app purchases

Questions

Is 72Hour Fasting Timer free?
72Hour Fasting Timer costs $1.99, with no in-app purchases.
Is Autophagy Tracker free?
Autophagy Tracker is free to download, with no in-app purchases.
Do 72Hour Fasting Timer or Autophagy Tracker have ads?
Neither 72Hour Fasting Timer nor Autophagy Tracker shows ads.
Which is updated more often, 72Hour Fasting Timer or Autophagy Tracker?
72Hour Fasting Timer ships an update every 7 months, and Autophagy Tracker every 3 days. Most recently, 72Hour Fasting Timer was updated on October 8, 2026 and Autophagy Tracker on September 30, 2026.

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