Sleep Guides & Articles

Learn how sleep works, discover the best nap durations, and understand sleep cycles to wake up feeling refreshed.

90 Minutes Sleep Cycle: How It Works & Best Wake-Up Times

Understand the 90-minute sleep cycle, sleep stages, and how waking up between cycles can improve energy and focus.

Learn how long a power nap should be, when to nap, and how to avoid post-nap grogginess.

Use our tools to calculate the best nap duration or wake-up time based on sleep cycles.