Comparison

Fasting Well vs Ayuno

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

Head to head
About

Fasting Well

Track your intermittent fasting journey with science-backed insights. Monitor your progress through different metabolic stages and view your history with a visual heatmap. Offers built-in plans and detailed scientific articles.

Highlights
  • Stage-aware fasting progress visualization
  • Live timer with customizable ring
  • Six built-in fasting plans
  • Journal and weekly progress charts
  • Science-backed articles on fasting
  • Calendar heatmap of activity
  • Privacy-first, on-device data storage
Features
Read full description

Fasting Well is a beautiful, science-grounded intermittent fasting tracker. Designed for the moments your fast actually happens — at home, in transit, before bed — with the kind of polish you'd expect from an app you open every day. EVERY FAST IS A JOURNEY A fast isn't a single state — it's a sequence. Anabolic. Catabolic. Fat-burning. Ketosis. Deep ketosis. Fasting Well shows you exactly where you are in that journey, with stage-aware visuals and a quiet narration of what's happening inside. WHAT YOU GET (FREE) • Live timer with the ring you'll want to watch • Six built-in plans: 16:8, 18:6, 20:4, OMAD, 24h, 36h • Stage-aware progress: see Anabolic → Ketosis unfold • Notifications when you cross a stage or hit your goal • Journal of your last 30 days with a weekly chart • Five long-form science articles, beautifully illustrated • Calendar heatmap of recent activity • Dark and light themes that look right on every screen WHY ANOTHER FASTING APP Because the popular ones either gutted their free tier or never felt like apps you'd open without a reason. Fasting Well is built to be the home screen icon you actually like seeing. PRIVACY-FIRST Your fasts and weight data stay on your device — no account, no cloud sync, no servers we own. To make the app better we collect anonymous usage signals (e.g. "a fast was started on the 18:6 plan" or "an article was opened") through PostHog. These contain no personally identifying information and can be turned off entirely in Settings → Privacy. SCIENCE-BACKED, NOT WELLNESS-HYPE Built on peer-reviewed fasting research. No talk of "detox." No supplements to sell. Just the metabolic story your body is actually telling. FASTING WELL PRO Go deeper with Pro: build custom fasting protocols, log your weight and watch the trend, unlock advanced statistics (12-week heatmap, completion rate, best streak), share beautiful fast cards, and pick from every accent color. Pro is a monthly or annual subscription, or a one-time lifetime purchase — and the core tracker stays free forever. QUESTIONS, FEEDBACK hello@fastingwell.app We're a small team. Every email gets read. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fastingwell.app/privacy

About

Ayuno

This app helps users build consistent intermittent fasting habits with a simple timer, health guidance, and progress tracking. It offers premium features like journaling, detailed insights, and personalized coaching.

Highlights
  • Simple fasting timer
  • Health-conscious guidance
  • Journaling (Premium)
  • Progress logging (Premium)
  • Meaningful insights (Premium)
  • Apple Health integration
  • Live Activities & Widgets (Premium)
Features
Read full description

Ayuno is a beautifully simple fasting companion designed to help you build healthy fasting habits with intention, consistency, and insight. Whether you're just getting started with intermittent fasting or you're an experienced faster, Ayuno provides the tools you need to stay focused on your goals. Features Simple fasting timer - Start popular fasting plans with a tap - Track your progress with a live countdown - See where you are in your fasting journey with easy-to-understand fasting phases Health-conscious guidance - Educational fasting tips and wellness guidance throughout your fast - Built-in safety screening before extended fasts - Gentle reminders to break your fast and prioritize your well-being Journal your journey (Premium) - Record your mood throughout the day - Add personal notes and reflections - Track multiple journal entries each day Log your progress (Premium) - Record weight, water intake, and daily steps - Sync with Apple Health for weight and step data - Export your fasting history as a PDF Discover meaningful insights (Premium) - View your fasting streaks and calendar history - Earn achievement badges as you build consistency - Monitor weight trends over time - Receive weekly recaps and optional weekly goals - Personalized coaching based on your own fasting history Stay connected - Live Activities for your Lock Screen and Dynamic Island (Premium) - Home Screen widget with your current fast - Helpful local notifications for fast completion, milestones, and reminders Apple Health Integration Ayuno integrates with Apple Health to: - Read your weight and daily step count (with your permission) - Save logged weights to Apple Health - Record completed fasts as Mindful Minutes Health access is always optional, and you remain in control of your data. Premium Features Unlock even more with Ayuno Premium: - Extended and custom multi-day fasts - Journal - Log - Insights - Personalized coaching - Automatic daily fasting schedules - Live Activities - Accent color customization Designed for Wellness Ayuno is designed to support healthy wellness habits—not crash dieting. It does not include calorie counting, BMI tracking, or weight-loss targets. All educational content is intended for informational purposes only and is not medical advice. If you have a medical condition or concerns about fasting, please consult your healthcare provider before beginning. SUBSCRIPTION DETAILS Ayuno Premium is available as an auto-renewing subscription: - Monthly — $3.99/month - Annual — $39.99/year (includes a 7-day free trial) Payment is charged to your Apple ID account at confirmation of purchase. Your subscription automatically renews unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Apple ID account settings after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://ayuno.regentmediagroup.com/terms/ Privacy Policy: https://ayuno.regentmediagroup.com/privacy/

Screenshots

Fasting Well4 screens
Ayuno4 screens

Verdict

The call

The clearest difference is in-app purchases: Fasting Well at none against Ayuno's 2. Fasting Well also leads on iOS requirement (17.0 vs 26.0). Ayuno's advantage is update cadence (every 4 days vs every 3 months). On price, rating, ratings volume and ads 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. Ayuno sells 2 in-app purchases, starting at $3.99 per month. Fasting Well asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Fasting Well against 5.0 for Ayuno. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Fasting Well ships an update every 3 months, Ayuno every 4 days. The most recent releases landed on October 13, 2026 and October 21, 2026 respectively.

Scorecard3 real differences · 7 level
Fasting Well versus Ayuno: the parameters behind the verdict, then further details
ParameterFasting WellAyuno
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings2 — better1
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size45 MB4 MB
Age rating4+12+
DeveloperGeneralizableBrandon Duncan

Customer experience

Fasting Well

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ayuno

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Fasting Well

No in-app purchases

2 purchases

Ayuno

Subscriptions2
  • Premium Monthly$3.991 Month
  • Premium Annual7 Days trial$39.991 Year

Questions

Is Fasting Well free?
Fasting Well is free to download, with no in-app purchases.
Is Ayuno free?
Ayuno is free to download, with in-app purchases available.
Which has better reviews, Fasting Well or Ayuno?
Fasting Well and Ayuno are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Fasting Well or Ayuno have ads?
Neither Fasting Well nor Ayuno shows ads.
Which is updated more often, Fasting Well or Ayuno?
Fasting Well ships an update every 3 months, and Ayuno every 4 days. Most recently, Fasting Well was updated on October 13, 2026 and Ayuno on October 21, 2026.

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