SparkFast vs Fasting Track

Most fasting apps count hours. SparkFast shows you what those hours might mean — estimated biological milestones that give you a reason to keep going. THE SPARK CHART Your fasting hours aren't just numbers. The SPARK Chart visualizes five estimated biological processes — from early insulin changes to deep cellular recycling — based on published research. It transforms a blank timer into a roadmap of what you're working toward. GUIDED REFEEDING Breaking a prolonged fast matters as much as the fast itself. SparkFast provides step-by-step refeeding protocols tailored to your fast duration and dietary preference. No more Googling "how to break a 72-hour fast" mid-fast. AI-POWERED PERSONALIZATION Tell SparkFast about your goals, experience, dietary preferences, and schedule. Our AI creates a custom fasting plan built around your life — not a one-size-fits-all template. CHALLENGES THAT BUILD HABITS Built-in challenges — from a beginner-friendly 5-day start to a 72-hour deep fast — give you structure and milestones to work toward. Track progress, earn achievements, and build consistency. BIOMARKER TRACKING (OPTIONAL) For users who track glucose, ketones, GKI, or Dr. Boz Ratio: type readings in, or import them from your Keto-Mojo meter. See how your metabolic data trends alongside your fasting practice. Most users start without this — it's there when you're ready. ALSO INCLUDES - Intermittent and prolonged fasting schedules (16:8, 18:6, OMAD, 36h, 48h, 72h+) - Apple Health and Health Connect sync for weight, sleep and steps - Step history by week, month and year, with your own entries for the days you walked without your phone - Motivational notifications at key fasting milestones - Eating window and hydration tracking - Stool tracking for gut health awareness - Custom trackers for anything you want to monitor BUILT FROM EXPERIENCE SparkFast was born when co-founder Veronica — who changed her own health through fasting — realized she kept printing charts of estimated biological milestones and sticking them on her kitchen wall to stay motivated during 72-hour fasts. That piece of paper became this app. IMPORTANT The SPARK Chart shows estimated timelines based on published fasting research. Actual metabolic responses vary between individuals based on diet history, metabolic health, and other factors. SparkFast is a motivational and educational tool, not a medical device. YOUR PRIVACY SparkFast does not sell personal data. All information is stored securely and encrypted. SUBSCRIPTION SparkFast requires a subscription for full access. Options include monthly and yearly plans, both with a free trial. Payment is charged to your Apple ID at purchase and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in App Store settings. Terms of Service: https://www.sparkfast.app/terms-of-service Privacy Policy: https://www.sparkfast.app/privacy-policy

Fasting Track is an intermittent fasting tracker and fasting timer that keeps fasting simple: pick a plan, start the timer and see your progress. No account and no sign-up: your fasting data stays on your phone. Whether you are new to intermittent fasting with 16:8, eating one meal a day (OMAD), following the 5:2 diet or trying a longer fast, Fasting Track gives you a live fasting timer, a schedule that fits your day and an honest log of how it is going. 17 built-in fasting plans The popular intermittent fasting methods and more, including 16:8, 12:12, 20:4 (Warrior Diet), OMAD, 5:2, Alternate-Day Fasting, Eat-Stop-Eat, the 36-hour Monk Fast, Extended Fasting (48–72 hours), Dry Fasting, Ekadashi, Circadian Rhythm Fasting, Daniel Fast, Fat Fasting, Juice Fasting and Bone Broth Fasting. Each plan explains its benefits, difficulty and beginner tips, with links to the research behind it. Prefer 14:10 or 18:6? Create your own fasting plan in seconds. Live fasting timer Start a fast with one tap. A countdown and progress ring show how long you have fasted and how long until your eating window opens. Pause and resume when life gets in the way. The body-phase card shows where you are in your fast (Fed State, Glucose Burn, Glycogen Depletion, Ketosis, Autophagy and Deep Repair) with a source for each phase. Weekly fasting schedule Your fasting and eating windows on a color-coded weekly calendar. For 5:2 and similar plans, pick your own fasting days. Tap any day to see its times or adjust them. Daily log and weight tracking Mark each day completed, partial or missed, and add mood, energy, weight, water, calories and notes. Find food ideas for breaking your fast gently. Missed a few days? Backfill them. Search your full history anytime. Stats that keep you going Current and longest streak, completion rate, average fast length, total hours fasted, a weight trend chart, an activity heatmap and a weekly bar chart, for the last 7, 30 or 90 days or all time. Set goals such as 30 days of 16:8 and watch them fill up. Many people use intermittent fasting for weight loss, and the weight chart shows your real trend. Private by design No account and no cloud sync. Your fasts, logs and weight stay on your phone. Back up to a file and restore it on a new phone, or export your history as CSV. Light and dark themes, and 24 app languages you can switch in Settings. Medical Disclaimer Fasting Track is for general informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. The fasting plans, tips, and health information in this app are not personalized medical recommendations. Always consult your physician or a qualified healthcare provider before starting any fast, changing your diet, or making decisions related to your health — especially if you are pregnant, breastfeeding, under 18, elderly, underweight, diabetic, taking medication, or have any medical condition or eating disorder. Stop fasting and seek medical attention if you feel unwell. Citations to the scientific sources referenced in the app are provided in Settings → About.