Which intermittent fasting app is best?

Zero (free tier available) is the most popular and integrates with Apple Watch and Fitbit. It tracks fasting windows and provides educational content about fasting science.

Should I exercise during my fasting window?

Light to moderate exercise during fasting is generally safe for healthy adults. Intense exercise may be better during eating windows. Consult your doctor, especially if you have health conditions.

Best Tech for Intermittent Fasting 2026