Comparison

Intermittent vs Vow Fasting

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

Head to head
About

Intermittent

Features
Read full description

Intermittent fasting works. Staying consistent is the hard part. Most people start IF motivated but quit within weeks. Not because fasting doesn't work - it does. They quit because tracking manually is tedious, they lose track of time, break fasts too early, or simply have no structure. Intermittent is the fasting timer that removes all of that friction. Simple timer. Smart notifications. Progress tracking. Everything you need to make IF effortless. HOW IT WORKS Choose Your Protocol Select from proven fasting schedules: 16:8, 18:6, 20:4, OMAD, 5:2, or create your own custom protocol. Set your eating window. Done. Start Your Fast One tap to start. The timer runs in the background. You get on with your day. Smart Notifications We notify you when your fast is complete and eating window opens. We remind you one hour before your eating window closes. You never lose track or accidentally break your fast early. Track Your Progress Every completed fast builds your streak. Your calendar fills up. You see consistency building. Weight trends (optional tracking) show the correlation between fasting and results. Simple Stats Average fast duration. Longest fast. Completion rate. Streak milestones. Everything you need to stay motivated and see your progress. WHAT YOU GET - Clean, elegant fasting timer for any protocol - Smart notifications at the right times - Streak tracking for accountability - Calendar view of your fasting pattern - Optional weight tracking with trend analysis - Stats on fasting consistency and duration - Unlimited protocol customization - Works completely offline WHO THIS IS FOR Anyone doing intermittent fasting who wants a simple, reliable timer. People who've tried IF before but couldn't stay consistent. Anyone looking for structure and accountability around their fasting practice. Both beginners learning IF and experienced fasters who need better tracking. WHY CONSISTENCY MATTERS Intermittent fasting works through metabolic adaptation. Your body needs consistent fasting windows to shift into fat burning, increase autophagy, improve insulin sensitivity, and deliver the benefits you're looking for. Random fasting - a 16-hour fast one day, eating all day the next, then an 18-hour fast a few days later - doesn't create adaptation. Consistency does. A timer gives you that consistency. You know when to eat. You know when to stop. You build the discipline that creates results. RESULTS TIMELINE Weeks 1-2: Building the habit, learning your rhythm Weeks 3-4: Hunger patterns adjust, fasting gets easier Weeks 5-8: Weight loss becomes consistent, energy improves Weeks 9+: Fasting is effortless, results are clear The key is making it through those first 3-4 weeks. That's where a timer makes the difference. Structure removes decision fatigue. Notifications prevent mistakes. Streaks create accountability. NO COMPLEXITY This isn't a meal planner. This isn't a calorie counter. This is a fasting timer. We do one thing and do it extremely well: help you fast consistently. Start your fast. Get notified when done. Track your progress. That's it. Simple. Clean. Effective. SUBSCRIPTION All features accessed through subscription. 3-day free trial included. Weekly ($4.99), monthly ($6.99), or annual ($49.99). Auto-renews unless turned off 24 hours before period ends. Manage in Account Settings. Privacy: https://sirca.io/intermittent/privacy Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Vow Fasting

Read full description

Vow is a refined intermittent fasting tracker built for calm daily discipline. Start a fast, follow your progress, and understand each stage as your body moves through metabolic phases like digesting, fat burning, ketosis, and autophagy. Vow keeps fasting focused with a precise timer, clear progress, thoughtful reminders, and a minimal dark design made for daily practice. Whether you follow 16:8, 18:6, 20:4, 24-hour fasts, or custom fasting goals, Vow helps you track every session with clarity. FEATURES • Elegant fasting timer with real-time progress • Intermittent fasting plans including 16:8, 18:6, 20:4, and 24h • Metabolic phase tracking from digesting to fat burning, ketosis, and autophagy • Fasting history, streaks, and weekly insights • Custom and extended fasting durations • Goal reminders and phase update notifications • Minimal dark interface with premium themes • Home Screen widgets and Live Activity support Vow Pro Unlock extended fasting protocols, custom durations, premium themes, advanced insights, and premium widgets. Vow is not medical advice. If you have a medical condition, are pregnant, under 18, or have a history of eating disorders, consult a healthcare professional before fasting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vowfasting.com/privacy

Screenshots

Intermittent3 screens
Vow Fasting4 screens

Verdict

The call

Intermittent and Vow Fasting are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Intermittent sells 3 in-app purchases, starting at $4.99 per 7 days and Vow Fasting sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Intermittent versus Vow Fasting: the parameters behind the verdict, then further details
ParameterIntermittentVow Fasting
PriceFreeFree
Update frequency—Fortnightly
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.6
Further details — not scored
Size1 MB13 MB
Age rating4+4+
DeveloperSircaFILIP LUCCA KEJSER DAMICI

In-app purchases

3 purchases

Intermittent

Subscriptions3
  • Intermittent Weekly3 Days trial$4.997 Days
  • Intermittent Monthly3 Days trial$6.991 Month
  • Intermittent Yearly$49.991 Year
2 purchases

Vow Fasting

Subscriptions2
  • Vow Pro Monthly$4.991 Month
  • Vow Pro Annual$39.991 Year

Questions

Is Intermittent free?
Intermittent is free to download, with in-app purchases available.
Is Vow Fasting free?
Vow Fasting is free to download, with in-app purchases available.
Do Intermittent or Vow Fasting have ads?
Neither Intermittent nor Vow Fasting shows ads.

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