Comparison

Fasta vs Sundial

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

Head to head
About

Fasta

Features
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Fasta is a private intermittent fasting timer for a routine that fits your life. Choose a daily fasting window, track water and personalize Today. No account. No ads. Core fasting records stay on your device. DESIGNED FOR DUO Optimized compact and expanded layouts make room for your routine. Unfold for spacious dashboards, a redesigned Progress view and side navigation. Custom plans include 15-minute duration controls and support for larger text. YOUR TIMER, YOUR PACE Choose a daily preset or custom window. See elapsed time, keep water and optional weight logs, and look back at your saved history. Stage estimates describe elapsed time, not a measurement of your body. MAKE TODAY YOURS Choose a Simple, Balanced or Detailed layout. Pin your favorite cards, hide what you do not need or use weight-free mode. Pick a coach tone and check-in preferences. Name your companion plant and choose its pot and scene. Breaks do not reduce its health. A MOMENT TO PAUSE Choose free one-, three- or five-minute breathing or reflection, or try self-paced grounding. Adjust the breathing pace, pause whenever you need and choose an optional reminder. Mindful moments do not require a fast. YOUR NEXT WEEK Compare saved activity from two complete weeks, then explore a seven-day schedule around your days. The comparison and editable preview are free. Saving and using the schedule requires Premium, a safety review and your confirmation. A schedule never starts a fast automatically. SAVE YOUR SETUP Save, preview and share routine configurations for free. Shared links include only the routine name, schedule and appearance, not health records, profile or purchase data. Recipients review a preview before choosing whether to apply it. Applying a weekly schedule requires Premium and safety review. FREE TO START The timer, daily presets, free one-week schedule starters, static weekly templates, basic weekly recap, Time Capsule, Year in Review, hydration, optional weight, basic history and safety settings are free. So are Today personalization, companion preferences, mindful moments and an optional first week of prompts to explore Fasta at your own pace. Apple Health weight/water sync and Restore Purchases are available without an account. SMALL MOMENTS, RECOGNISED Trophies recognise mindful moments, check-ins, personal choices and saved routines. Choose animated, quiet or no celebrations, with optional haptics. Any days count; there is no streak to protect. FASTA PREMIUM Premium adds editable weekly fasting schedules, the private on-device coach, 30-day reports and CSV exports, premium themes and premium timer styles. Choosing a coach tone does not unlock Premium coach features. Local prices and subscription terms appear before purchase. Any trial depends on the selected store offer and your eligibility. APPLE WATCH, WIDGETS, AND HEALTH Stay oriented from your wrist, widgets, Lock Screen or Live Activity. Apple Health is optional. With permission, Fasta can read weight, water, sleep, HRV, resting heart rate, steps, active energy and blood glucose as logged context, and write water and weight entries you log in the app. Logged context is not a health or fasting-safety assessment. PRIVATE BY DESIGN Fasta uses local device storage. Your core fasting data stays on your device unless you choose to export or share it. You control optional health permissions. IMPORTANT Fasta is for general wellness and fasting habit support, not medical advice. If you are pregnant, under 18, have a medical condition, have a history of disordered eating, or are unsure whether fasting is appropriate for you, speak with a qualified health professional first. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ SHARE FEEDBACK Share feedback from Settings. Your email app opens your draft; you choose whether to send it.

About

Sundial

Features
Read full description

Finally, a fasting timer you buy once and own for life. No subscription. No account. No quiz-funnel paywall. Just open it and start your fast. Sundial is a calm, local-first tracker for intermittent fasting and OMAD (one meal a day). One quiet ring; a sun crosses the dial as your fast deepens. Warm paper-and-ember design, automatic dark mode. No neon, no confetti, no streak-shaming. It works fully offline from the very first tap. WHY SUNDIAL IS DIFFERENT - Pay once, $19.99. No $60-80/year renewals for a glorified timer. - No forced sign-up, no quiz funnel, no data siphoning. Cloud backup is optional, never required. - Fasting zones and stages are explained for free - learn what each stage is called, hour by hour. Most apps lock this away. - Custom durations up to 72 hours - log any fast you choose, with no upsell. - Retroactive editing: forgot to hit start or stop? Fix it, or log a past fast. - Your eating window anchors to when you actually broke the fast - not a rigid schedule. FREE FOREVER - Timer for every protocol: 16:8, 18:6, 20:4, OMAD, 36h, and custom. - Fasting zones and stage labels on the dial. - History, calendar, streaks, and weekly stats. - Weight, water, and mood logging. - Gentle notifications for start, end, and milestones. - Export everything to CSV or JSON in two taps. Your data is yours. LIFETIME UNLOCK ($19.99, ONCE) - Cloud backup and cross-device sync. - Insights: deeper trends over time. - The full Field Notes library of calm, readable articles - including a plain explainer of what autophagy is. Everything you need to fast is already free. Lifetime is for going further, on your terms. BUILT TO RESPECT YOU Local-first and private by design. No ads, no data mining, no guilt loops, no upsell screens between you and your timer. A quieter way to keep time. Sundial tracks time. It is not medical advice. Talk to a healthcare professional before changing how you eat or starting extended fasts, especially if you are under 18, pregnant, managing diabetes, or have a history of disordered eating.

Screenshots

Fasta4 screens
Sundial4 screens

Verdict

The call

Fasta and Sundial 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. Fasta sells 2 in-app purchases, starting at $5.99 per month and Sundial sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Fasta versus Sundial: the parameters behind the verdict, then further details
ParameterFastaSundial
PriceFreeFree
Update frequencyEvery 3 weeksโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple Watch โ€” betteriPhone
Requires iOS16.416.4
Further details โ€” not scored
Size87 MB65 MB
Age rating17+4+
DeveloperOneCount Pty LtdVitalii Iudin

In-app purchases

2 purchases

Fasta

Subscriptions2
  • Fasta Premium14 Days trial$5.991 Month
  • Fasta Premium14 Days trial$39.991 Year
1 purchases

Sundial

One-time1
  • Sundial Lifetime$19.99

Questions

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

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