Comparison

Intermittent Fasting vs Clearfast

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

Head to head
About

Intermittent Fasting

This app tracks both your fasting periods and your eating windows, offering a unique dual-countdown feature. It visualizes metabolic phases like fat burning and ketosis, supports various fasting methods, and provides insights into your progress. It's designed to be user-friendly and privacy-conscious, working entirely offline.

Highlights
  • Eating window countdown
  • Fasting phases visualization
  • Support for multiple fasting methods
  • Streak tracking with grace periods
  • Pattern insights
  • Weight and BMI tracking
  • Smart notifications
  • 100% offline functionality
Features
Read full description

Free · Works offline · No account needed. JustFast is a simple intermittent fasting app and fasting timer for everyday use. Pick a 16:8, 18:6 or OMAD plan, tap start, and see how much time is left of your fast and of your eating window. No account and no long setup: your first fast starts in seconds. New to intermittent fasting? A plan like 16:8 means 16 hours of fasting followed by an 8-hour eating window. Many beginners start with 12:12 or 14:10 and move to 16:8 or 18:6 when it feels comfortable. JustFast explains each plan in plain words and lets you switch at any time. FREE FOREVER • The fasting timer and every plan, including open-ended and 36, 48 and 72-hour fasts • Reminders and the widget • Water tracking • History, fasting phases, edits and adding a past fast START IN SECONDS • Presets from 8 to 24 hours, including 12:12, 14:10, 16:8, 18:6 and 20:4 • OMAD (one meal a day, 23:1) • Extended 36, 48 and 72-hour fasts • Custom fasts of any length • Open-ended fasts that count up until you decide to stop • Edit the start time if you forgot to press start, or add a past fast later FASTING PHASES Follow the approximate phases of a fast, hour by hour, right on the timer. The phase times are general guidelines that vary from person to person. They are not medical advice. EATING WINDOW COUNTDOWN When a fast ends, JustFast counts down your eating window as well, so you always know how much time you have left to eat before your next fast. WEEKLY PLAN AND WEEKLY REVIEW Plan which days you fast and for how long. Each week, a short Weekly Review shows what you completed and suggests a calm next step. No guilt and no nagging. STREAKS, ACHIEVEMENTS AND HISTORY • Streaks with a grace period for busy days • Achievements for your milestones • A calendar plus 7-day and 30-day charts of your fasting hours • Export your history as a CSV file WEIGHT AND BMI Log your weight, follow your trend and BMI, and optionally sync your weight with Apple Health. REMINDERS AND WATER Optional reminders to start your fast and a notification when your fast is complete. You choose the time. Log a glass of water with one tap. PRIVATE AND SIMPLE • No account, no email, no sign-up needed • Your fasting and weight data stay on your iPhone unless you turn on cloud backup • Works offline • The timer screen is ad-free; small banners appear on secondary screens JUST FAST PLUS (OPTIONAL) Plus removes the ads and adds long-term Insights (90-day, 1-year and all-time trends, and fasting next to your weight) and cloud backup with sign-in. Plus is optional — pay once (Lifetime) or subscribe (Monthly or Yearly). Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel them in your App Store account settings. WHO IT IS FOR • Beginners who want a clear fasting timer without a long questionnaire • People who follow 16:8, 18:6, 20:4 or OMAD and want a quick daily routine • Anyone who wants to track time-restricted eating without creating an account 32 LANGUAGES English, Arabic, Finnish, French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish and 17 more. Whether you are trying intermittent fasting for the first time or you already follow 16:8, 18:6 or OMAD, JustFast keeps your fasting timer, your eating window and your history in one calm place. Download JustFast and start your first fast today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Clearfast

Features
Read full description

ClearFast is the anti-bloatware intermittent fasting app. Simple. Beautiful. Effective. FASTING MADE SIMPLE Track your intermittent fasting journey without the noise. Set your target, start your fast, and watch your progress unfold in real-time. NO DISTRACTIONS • No ads interrupting your experience • No account required - your data stays on your device • No unnecessary features - just what you need to fast successfully BEAUTIFUL INTERFACE Choose from 4 stunning themes that make fasting tracking a joy: • Default - Classic dark elegance • Ocean - Calming blue depths • Sunset - Warm evening glow • Forest - Natural green serenity (Premium) • Midnight - Deep purple mystique (Premium) • Aurora - Ethereal light show (Premium) SMART NOTIFICATIONS Get notified when: • Your fasting period is about to end (1 hour before) • Your fast is complete and it's time to eat COMPREHENSIVE STATS Track your fasting journey with detailed statistics: • Current streak of consecutive fasts • Total fasting hours accumulated • Average fasting duration • Longest fast achieved • Visual progress tracking FLEXIBLE FASTING • Quick-start presets: 16:8, 18:6, 20:4, 24-hour fasts • Custom fasting durations for your schedule • Easy fast management - start, stop, or cancel anytime PREMIUM FEATURES Unlock 3 exclusive premium themes with a one-time purchase: • Forest - Connect with nature • Midnight - Embrace the darkness • Aurora - Dance with the lights No subscriptions. Pay once, enjoy forever. PRIVACY FIRST Your fasting data is stored locally on your device. No cloud sync, no servers, no tracking. What's yours stays yours. BUILT FOR YOU Whether you're new to intermittent fasting or a seasoned faster, ClearFast adapts to your lifestyle. No learning curve, no complexity - just open the app and start fasting. Download ClearFast today and experience fasting tracking the way it should be: simple, beautiful, and distraction-free.

Screenshots

Intermittent Fasting4 screens
Clearfast4 screens

Verdict

The call

The clearest difference is ads: Clearfast at none against Intermittent Fasting's shown. Clearfast also leads on iOS requirement (13.0 vs 15.0). On price, 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

Both are free to download. Intermittent Fasting sells 4 in-app purchases, starting at $2.99 per month and Clearfast sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Intermittent Fasting versus Clearfast: the parameters behind the verdict, then further details
ParameterIntermittent FastingClearfast
PriceFreeFree
Rating5.0 (9 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 2 weeks—
AdsYesNo — better
In-app purchasesYesYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size126 MB19 MB
Age rating4+4+
DeveloperAdrian CabalaMagency Consultants

In-app purchases

4 purchases

Intermittent Fasting

Subscriptions3
  • Just Fast Plus monthly$2.991 Month
  • Just Fast Plus7 Days trial$14.991 Year
  • Just Fast Plus$14.991 Year
One-time1
  • Just Fast Plus Lifetime$29.99
1 purchases

Clearfast

One-time1
  • Premium Lifetime Access$19.99

Questions

Is Intermittent Fasting free?
Intermittent Fasting is free to download, with in-app purchases available.
Is Clearfast free?
Clearfast is free to download, with in-app purchases available.
Do Intermittent Fasting or Clearfast have ads?
Intermittent Fasting shows ads; Clearfast does not.

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