Comparison

FastTrack Fasting Timer 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

FastTrack Fasting Timer

Features
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FastTrack is the cleanest, most intentional way to track your intermittent fast. No clutter. No noise. Just a precise countdown that keeps you focused โ€” glanceable from your Dynamic Island and Lock Screen without ever opening the app. Live Activities put your progress exactly where you need it. FastTrack uses iOS Live Activities to display a real-time countdown on the Dynamic Island and Lock Screen. Your fast is always visible, always accurate โ€” even when your phone is sitting face-down on a desk. Every protocol, handled. Whether you fast 16:8, 18:6, 20:4, or push through an extended 36 or 72-hour window, FastTrack supports them all โ€” plus fully custom durations. Set it once and let the app do the rest. Your history, beautifully organized. A calendar view gives you a complete record of every fast at a glance. Tap any day to see the full breakdown. Weekly charts, monthly trends, personal bests, and consistency tracking reveal what's actually working. Available with Pro. Streaks that hold you accountable. FastTrack tracks your fasting streak, sends a heads-up when it's at risk, and celebrates every milestone you hit. Consistency compounds โ€” this is how you measure it. Synced with Apple Health. Fasting windows are recorded automatically, so your data lives where your other health metrics do. Smart notifications remind you when to start, alert you as the finish line approaches, and confirm every completed fast. No ads. No tracking. No fluff. FastTrack does exactly what it says and nothing it shouldn't. All your data is yours โ€” export everything to CSV anytime. Pro unlocks advanced insights, trends, and export tools for people who want the full picture. Start your fast. FastTrack handles the rest. Terms of Use: https://fasttrackfasting.app/terms Privacy Policy: https://fasttrackfasting.app/privacy

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, $2.99. 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 ($2.99, 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

FastTrack Fasting Timer4 screens
Sundial4 screens

Verdict

The call

The clearest difference is iOS requirement: Sundial at 16.4 against FastTrack Fasting Timer's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

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. FastTrack Fasting Timer sells 2 in-app purchases, starting at $1.99 per month and Sundial sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference ยท 5 level
FastTrack Fasting Timer versus Sundial: the parameters behind the verdict, then further details
ParameterFastTrack Fasting TimerSundial
PriceFreeFree
Update frequencyโ€”Every 5 months
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS18.016.4 โ€” better
Further details โ€” not scored
Size2 MB58 MB
Age rating4+4+
DeveloperChris KarlinVitalii Iudin

In-app purchases

2 purchases

FastTrack Fasting Timer

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Yearly$14.991 Year
1 purchases

Sundial

One-time1
  • Sundial Lifetime$2.99

Questions

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

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