Comparison

Intermittent vs Fasting Timer

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

Head to head
About

Intermittent

This app tracks your fasting progress by showing real-time biological phases like ketosis and autophagy. It provides science-backed explanations for each stage and supports various fasting protocols without requiring an account or subscription.

Highlights
  • Real-time biological phase tracking (Fed, Lipolysis, Ketosis, Autophagy)
  • Support for multiple fasting protocols (12:12 to 72-hour fasts)
  • Free science library with cited primary sources
  • Adaptive hydration target
  • Weight and progress tracking with trend analysis
  • Private sharing circle with applause-only responses
  • Home screen widget and cross-device sync
Features
Read full description

The intermittent fasting tracker that shows the biology happening inside you in real time: Fed, Lipolysis, Ketosis, Autophagy. Ad free fasting app. No account required. Most fasting apps give you a countdown clock and a streak to protect. Intermittent does something different. It shows you exactly which biological phase your body is in right now, and explains the science behind it with cited primary sources, not marketing copy. If you have ever wondered how to track fasting properly, or what is actually happening during a fast, this is the fasting tracker built for that question. WHY FASTING WORKS Intermittent fasting works because of what happens between meals, not just the absence of food. As your fast progresses, your body moves through distinct phases: burning through glucose reserves, shifting into fat burning lipolysis, entering ketosis, and eventually triggering autophagy, the cellular repair process linked to longevity and metabolic health. Understanding these transitions is what separates intentional fasting from guesswork. Intermittent maps every stage so your goals are grounded in biology, not motivation. KEY FEATURES PHASE AWARE FASTING TIMER A real time timer that tracks six biological phases: Fed, Early Fasting, Lipolysis, Ketosis, Autophagy, and Deep Fast. Each phase links to a free science article with primary sources cited. EVERY FASTING PROTOCOL, ONE APP Supports 12:12, 14:10, 16:8, 18:6, 20:4, OMAD (One Meal A Day), 36 hour, 48 hour, and 72 hour fasts. FREE FASTING SCIENCE LIBRARY A full library of fasting articles covering intermittent fasting, ketosis, autophagy, insulin response, and more. No subscription. No account. No paywall. SMART HYDRATION TARGET A science backed hydration goal that adapts to your weight, sex, age, and fasting duration. WEIGHT AND PROGRESS TRACKING Log your weight after each fast and track trends over time. Includes streak heatmap, phase reach history, and estimated fat vs glucose energy usage. PRIVATE CIRCLE AND END OF FAST REFLECTION Share your fast with a small private group. Applause only responses. No comparison. No gamification. HOME SCREEN WIDGET AND CROSS DEVICE SYNC Keep your fasting timer visible with a home screen widget. Your data syncs across devices privately without third party trackers. WHO IT IS FOR Intermittent is built for adults who want to understand fasting, not be coached through it. If you follow research on metabolic health, read about longevity, or want a fasting routine grounded in biology rather than points or streaks, this app is for you. Suitable for both beginners and experienced fasters. HOW IT WORKS Choose your fasting protocol, from 12:12 to extended fasts Start your timer and track your biological phase in real time Tap any phase to read the science and log your reflection at the end No account required to start. No subscription required to access the library.

About

Fasting Timer

Features
Read full description

広告なし・会員登録不要・余計な機能は一切なし。開いてすぐ使えるシンプルなファスティングタイマーです。 No ads. No account required. No unnecessary features. Just open the app and start fasting. Fasting Timer is a simple fasting tracker designed for intermittent fasting. Track your fasting time with a clean timer and visual progress rings. The app highlights key milestones such as Fat Burning (10 hours) and Autophagy (16 hours), helping you stay motivated throughout your fasting journey. Features: • Simple fasting timer • Fat Burning and Autophagy milestones • Fasting history calendar • Current streak tracking • Easy record editing • No account required

Screenshots

Intermittent4 screens
Fasting Timer4 screens

Verdict

The call

The clearest difference is device support: Intermittent at 3 against Fasting Timer's 1. Intermittent also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Intermittent ships an update every 10 days, Fasting Timer fortnightly. The most recent releases landed on October 14, 2026 and September 26, 2026 respectively.

Scorecard2 real differences · 8 level
Intermittent versus Fasting Timer: the parameters behind the verdict, then further details
ParameterIntermittentFasting Timer
PriceFreeFree
Rating5.0 (46 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings46 — better—
Update frequencyEvery 10 days — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.6
Further details — not scored
Size39 MB4 MB
Age rating17+4+
DeveloperRohit Kumarmasayuki koga

In-app purchases

None

Intermittent

No in-app purchases

None

Fasting Timer

No in-app purchases

Questions

Is Intermittent free?
Intermittent is free to download, with no in-app purchases.
Is Fasting Timer free?
Fasting Timer is free to download, with no in-app purchases.
Do Intermittent or Fasting Timer have ads?
Neither Intermittent nor Fasting Timer shows ads.
Which is updated more often, Intermittent or Fasting Timer?
Intermittent ships an update every 10 days, and Fasting Timer fortnightly. Most recently, Intermittent was updated on October 14, 2026 and Fasting Timer on September 26, 2026.

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