Support

nidraro monitors two key signals from your Apple Watch: your heart rate and your movement. As you fall asleep, your heart rate naturally decreases and your body becomes still. When nidraro detects these patterns consistently, it recognizes that you're drifting off and pauses your audio. This is much more accurate than a simple timer because it responds to your actual physiology, not an arbitrary countdown.

nidraro works with virtually any app that plays audio on your iPhone, including:

• Apple Podcasts
• Audible
• Spotify
• Overcast
• Pocket Casts
• Apple Music
• YouTube (audio)
• And many more

nidraro uses iOS system-level audio controls, so it doesn't need special integration with each app.

The Apple Watch provides the heart rate and motion sensors that nidraro needs to detect sleep. Without continuous access to these physiological signals, nidraro would have no way to know when you've actually fallen asleep. The Watch is essential for accurate sleep detection.

nidraro is designed to minimize battery impact. During normal monitoring, it samples your heart rate every 30 seconds. When it detects you might be getting drowsy, it increases to every 10 seconds for more accuracy. Most users see only a modest battery impact, and the Watch should easily last through a full night of monitoring.

You can adjust the sensitivity in nidraro's settings:

• Pause Delay — How long nidraro waits after detecting sleep before pausing. A longer delay reduces false positives.
• Wake Grace Period — How long you have to stir before nidraro resumes playback, preventing accidental resumes.

If you find nidraro pausing while you're still awake, try increasing the pause delay. If it's pausing too late, try decreasing it.

Absolutely. All data stays on your device. nidraro does not collect, transmit, or store any of your health information on external servers. There are no accounts, no cloud sync, and no analytics. Your heart rate and sleep data are yours alone. See our Privacy Policy for full details.

When you wake up, nidraro shows you a "rewind suggestion" — the amount of time between when it first detected you were getting drowsy and when it paused playback. This tells you roughly how much of the audio you might have missed while falling asleep. You can use this to rewind your podcast or audiobook to the right spot.

nidraro uses Apple's Workout Mode internally to maintain continuous access to heart rate data. This happens automatically when you start monitoring — you don't need to start a separate workout. The "workout" isn't recorded or saved to your fitness history; it's purely a technical mechanism for sensor access.

If the connection between your Apple Watch and iPhone is lost during monitoring, nidraro will pause playback as a safety measure (assuming you may have fallen asleep). When the connection is restored, you can see what happened in your session history.