SparkFast vs Intermit

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: log readings manually or sync from Keto-Mojo and Apple Health. 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 integration for weight, sleep, steps, and heart rate - 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 went from a BMI of 32 to a normal BMI 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

The intermittent fasting tracker you buy once and keep forever. No subscriptions, no ads, no account required. Just start your fast and let Intermit guide you through every metabolic stage. SMART FASTING TIMER Start, pause, and resume your fasts with a beautiful progress ring that shows your current metabolic stage — from Fed all the way to Autophagy. Choose from 13 popular protocols (12:12, 14:10, 16:8, 18:6, 20:4, OMAD, and more) or build your own custom schedule. CYCLE-SYNCED FASTING Sync your fasting to your menstrual cycle. Intermit suggests gentler protocols during your luteal and menstrual phases, and more ambitious ones when your body is primed for fat burning and ketosis. Track your period, view your current phase, and get personalized protocol recommendations tailored to your cycle. METABOLIC STAGES See exactly where you are in your fast — from the Fed state through Fat Burning, Ketosis, Deep Ketosis, and Autophagy — with clear explanations of what is happening in your body at each stage. HISTORY & STATISTICS Review every completed fast, track your streaks, averages, and protocol breakdown. Export your data as CSV anytime: your data is yours, always. PRIVACY FIRST All data stays on your device. No account required, no cloud sync, no tracking, no analytics. Your health data never leaves your phone. ONE-TIME PURCHASE Pay once, use forever. No subscriptions, no hidden fees, no ads. Intermit is yours for life. --- Privacy Policy: https://getintermit.com/privacy-policy Terms of Service: https://getintermit.com/terms-of-service