Comparison

SOL vs Intermittent

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

Head to head
About

SOL

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SOL (์†”) is Korean for pine tree. Like the pine that endures through every season, SOL stands with you through every fast. WHAT MAKES SOL DIFFERENT Most fasting apps just show a timer. SOL shows you what is happening inside your body as the hours pass, with the research behind it. As you fast, SOL guides you through eight phases: Fed State, Insulin Dropping, Fat Burning, Ketosis, Autophagy, Deep Autophagy, Growth Hormone Surge and Immune Reset. FEATURES โ€ข A calm timer with a progress ring and phase markers โ€ข Your fast on the lock screen and in the Dynamic Island โ€ข All 8 phases explained, with links to the published studies โ€ข A goal dial from 12 to 72 hours, or an open fast with no limit โ€ข Started earlier? Set the time you last ate, and correct it later โ€ข Switch the timer between time elapsed and time to go โ€ข A daily reminder to start your fast โ€ข Your Journey: stats, streaks, a 7 day view and your history โ€ข Edit, add or delete past fasts โ€ข Guidance on breaking your fast gently โ€ข Home screen widget โ€ข "Start my fast" with Siri โ€ข Share your results with a beautiful card โ€ข Light and dark mode with handcrafted watercolor textures FASTING TOGETHER If you like, join the live count of people fasting right now. It is optional, anonymous and off until you turn it on. YOUR DATA No account, no ads, no tracking. Your fasting data stays on your device unless you choose to join the community count or turn on iCloud backup. DESIGNED WITH INTENTION SOL is inspired by the simplicity of nature. No clutter and no paywall. Just you, your fast, and a clearer picture of what your body is doing. SOL is free. If you enjoy it, you can leave a tip. ABOUT THE SCIENCE Phase information is based on peer-reviewed research, with direct links to the sources. Some findings come from animal studies, and every body responds differently. SOL offers general wellness information and is not medical advice. Please talk to a doctor before fasting, especially for longer fasts. Begin your fast. Know your body. Grow like the pine.

About

Intermittent

Features
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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/

Screenshots

SOL4 screens
Intermittent3 screens

Verdict

The call

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

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

ScorecardNo meaningful differences
SOL versus Intermittent: the parameters behind the verdict, then further details
ParameterSOLIntermittent
PriceFreeFree
Update frequencyFortnightlyโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS1616.0
Further details โ€” not scored
Size7 MB1 MB
Age rating4+4+
DeveloperDanny LinsnerSirca

In-app purchases

3 purchases

SOL

One-time3
  • Seedling Tip$1.99
  • Sapling Tip$3.99
  • Pine Tip$8.99
3 purchases

Intermittent

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

Questions

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

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