Fasting is a powerful tool, but for both beginners and seasoned experts, two major hurdles can derail your progress: staying motivated and breaking the fast correctly. SparkFast was built from the ground up to solve these specific problems.
The SPARK Chart is a revolutionary feature that provides a visual representation of the estimated biological processes happening in your body as you fast. For the first time, you can watch your progress as the app tracks key benefit estimations over time, including:
The Motivational Engine is a background system that acts as your personal coach.
It is linked to your elapsed fasting time and sends timely, science-inspired push notifications that correspond to key milestones on the SPARK Chart , such as entering ketosis or reaching peak autophagy.
When you see a message that your body is beginning to reap a new benefit, you'll feel more committed than ever to completing your fast.
Our Refeed Protocol Engine is designed to give you a safe and effective plan so you can properly break your fast, maximize its benefits, and avoid discomfort. The engine activates immediately after you complete a prolonged fast.
The app automatically suggests a preset refeed plan based on two critical variables: the duration of the fast you just completed and your personal dietary preference (e.g., Keto, Vegan). Your personalized plan is delivered as a series of timed, step-by-step meal suggestions in an interactive checklist, with reminders to guide you through the process.

The SparkFast app offers a user-friendly dashboard that consolidates your essential health metrics, providing visible evidence of your progress. The Biomarker Tracker displays your data over time with intuitive line graphs.
Automate your tracking by connecting to your existing health data sources. SparkFast offers seamless, real-time integration to sync your biomarkers automatically.



New to structured fasting? SparkFast is the perfect guide. Our app provides a high degree of guidance, clear instructions, and the strong motivational support you need to succeed. We help you overcome intimidation with simple fast presets and safe refeed plans.

New to structured fasting? SparkFast is the perfect guide. Our app provides a high degree of guidance, clear instructions, and the strong motivational support you need to succeed. We help you overcome intimidation with simple fast presets and safe refeed plans.