The only fasting tracker app you need for powerful motivation and expert-level refeed guidance.
Get all features for one simple price.
SparkFast uses a unique dual approach to motivation. First, the SPARK Chart gives you a real-time visual estimate of the biological benefits happening in your body, like autophagy and ketosis. Second, our Motivational Engine sends you science-inspired messages and notifications when you reach key fasting milestones, keeping you committed to your goals .
Our Refeed Protocol Engine is an expert system, not just a simple guide. When you end a prolonged fast, it automatically generates a personalized, step-by-step refeed plan. This plan is intelligently based on two key factors: the duration of your fast and your personal dietary preference (like Keto or Vegan) that you set during onboarding . It guides you with timed steps and reminders to ensure you break your fast safely.
SparkFast is a premium-only app designed to provide a focused, high-value experience without ads or a confusing "freemium" model. Access to all features requires a subscription. We offer two simple plans: $4.99 per month or a $39.00 per year plan, which saves you 33%. Payment is handled securely through your Apple ID via the App Store.
Yes, absolutely. The app is built for all types of fasters. You can select common Intermittent Fasting protocols like 16:8, 20:4, or 23:1. When you're on an intermittent schedule, the dashboard changes to show you your current window (Fasting or Eating) and a countdown timer for that specific window, helping you manage your daily cycle.
For Version 1, all your data, including your fast history and settings, is stored locally on your device for complete privacy. Because of this, if you delete the app or change devices, your data will be lost. We plan to add an optional cloud sync feature in a future version. You can use the Data Export feature at any time to save a PDF or CSV copy of your history.
To give you a complete picture of your health, SparkFast can sync data from Apple Health (with your permission). The app is designed to import your Weight, HRV, Sleep, Steps, Ketones, and Glucose readings to populate your Biomarker Tracker.