Comparison

Lull vs Intermittent

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

Head to head
About

Lull

Features
Read full description

Lull is the shortest health app in the world. Open it. Breathe for 60 seconds. Close it. That's the entire app. No onboarding marathon. No subscription. No library of content you'll never use. Lull does one thing: guides you through 60 seconds of breathing, once a day — then gets out of your way. — 5 BREATHING TECHNIQUES — A different technique rotates in automatically each day, so you never have to decide: • Square Breath — 4 in · 4 hold · 4 out · 4 hold. The baseline. Used by everyone from athletes to surgeons. • 4-7-8 Breath — Inhale for 4, hold for 7, exhale for 8. Resets your nervous system in seconds. • Deep Sigh — A double inhale followed by a long exhale. The fastest way to offload stress. • Coherent Breath — 5.5 seconds in, 5.5 out. Puts your heart rate variability into a natural rhythm. • Power Breath — Fast cycles followed by a hold. A light version of the Wim Hof method to build energy. — JUST BREATHE — The animated circle expands as you inhale and contracts as you exhale. Gentle haptic pulses mark each phase change. No thinking required. — STREAK — The only metric that matters: how many days in a row did you show up? Lull tracks your streak and lets you share it — without looking like an ad. — NATIVE — • Logs every session as Mindful Minutes in Apple Health • Daily reminder at whatever time you choose • All data stays on your device — no account, no cloud, no tracking Lull wants you to close it.

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 timer that shows which fasting phase you have likely reached, from fat burning lipolysis to ketosis and autophagy, based on how long you have fasted. Ad free. No account required. Most fasting apps give you a countdown clock and a streak to protect. Intermittent does something different. It maps your hours fasted to the phases research describes, and explains the science behind each one with cited primary sources, not marketing copy. If you have ever wondered how to track fasting properly, or what is likely 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 live timer that maps your fast to six 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. EATING WINDOW, REMINDERS AND RECAPS See your eating window after each fast, with an optional heads-up before it closes. Set your usual start time for a gentle reminder. Look back on each month and year with a recap you can share. 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 see which phase you have likely reached 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.

Screenshots

Lull4 screens
Intermittent4 screens

Verdict

The call

The clearest difference is update cadence: Lull at daily against Intermittent's every 2 weeks. Intermittent's advantage is iOS requirement (15.0 vs 17.0). On price, 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

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

UpkeepUpdate frequency

Lull ships an update daily, Intermittent every 2 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Lull versus Intermittent: the parameters behind the verdict, then further details
ParameterLullIntermittent
PriceFreeFree
Rating—5.0 (48 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—48 — better
Update frequencyDaily — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size1 MB47 MB
Age rating4+4+
DeveloperMarkus FüllerRohit Kumar

In-app purchases

None

Lull

No in-app purchases

None

Intermittent

No in-app purchases

Questions

Is Lull free?
Lull is free to download, with no in-app purchases.
Is Intermittent free?
Intermittent is free to download, with no in-app purchases.
Do Lull or Intermittent have ads?
Neither Lull nor Intermittent shows ads.
Which is updated more often, Lull or Intermittent?
Lull ships an update daily, and Intermittent every 2 weeks. Most recently, Lull was updated on October 25, 2026 and Intermittent on October 28, 2026.

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