Comparison

SimpleFast vs Sundial

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

Head to head
About

SimpleFast

Features
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SimpleFast: Fasting Tracker A clean and simple way to track your fasting windows, eating windows, and daily habits - all in one place. SimpleFast is designed to help you stay consistent without distractions. Whether you’re just starting or following a structured plan like 16:8, it keeps everything clear, calm, and easy to use. - 100% Free. No ads. No distractions. SimpleFast is completely free to use, with no ads and no subscriptions. Focus on your fasting routine without interruptions. - Track your fast, effortlessly Start a fasting session with one tap and let SimpleFast handle the rest - even when the app is closed. Choose from popular fasting styles: * 16:8 Intermittent Fasting * Overnight Fasting * Alternate Day Fasting * Custom durations - Flexible eating windows After your fast, start an eating window and adjust it to match your real schedule. * Set custom start time * Adjust window length * Track fasting and eating cycles - See your progress * Daily streak tracking * Total fasting time * Longest fast * Weekly overview - Reflect and stay consistent * Mood tracking * Hunger level * Notes after each fast - Helpful reminders * Fast complete alerts * Eating window reminders * Window ending alerts - Private by design Your data stays on your device. No account required. No tracking. - Disclaimer SimpleFast is a fasting tracker for personal use. It does not provide medical advice.

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

SimpleFast4 screens
Sundial4 screens

Verdict

The call

The clearest difference is in-app purchases: SimpleFast at none against Sundial's 1. Sundial's advantage is iOS requirement (16.4 vs 26.2). On price, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sundial sells 1 one-off in-app purchase. SimpleFast asks for nothing beyond the download.

Scorecard2 real differences Β· 4 level
SimpleFast versus Sundial: the parameters behind the verdict, then further details
ParameterSimpleFastSundial
PriceFreeFree
Update frequencyβ€”Every 5 months
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad β€” betteriPhone
Requires iOS26.216.4 β€” better
Further details β€” not scored
Size6 MB58 MB
Age rating4+4+
DeveloperKhitdhikhun KlinsangVitalii Iudin

In-app purchases

None

SimpleFast

No in-app purchases

1 purchases

Sundial

One-time1
  • Sundial Lifetime$2.99

Questions

Is SimpleFast free?
SimpleFast is free to download, with no in-app purchases.
Is Sundial free?
Sundial is free to download, with in-app purchases available.
Do SimpleFast or Sundial have ads?
Neither SimpleFast nor Sundial shows ads.

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