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Why did AutoSleep switch to Sleep Analysis?

If you normally use Sleep Stage mode but Apple Sleep Stage data aren’t available for a particular day, AutoSleep automatically switches that day to Sleep Analysis mode.

This can happen if Sleep Focus wasn’t turned on when you went to sleep, or wasn’t turned off when you woke up, preventing the expected Sleep Stage data from being written to Apple Health.

Rather than leaving you with missing sleep information, AutoSleep uses its own Sleep Analysis for that day so you can still see and analyse your sleep.

What are Sleep Stages and Sleep Analysis?

Sleep Stages uses sleep data recorded by the Apple Sleep app and saved to Apple Health. This includes stages such as REM, Core and Deep sleep.

Sleep Analysis is AutoSleep’s own sleep analysis mode. It uses your Apple Watch data to analyse your sleep without relying on Apple Sleep Stage data.

You can normally choose either mode and easily switch between them. Whichever mode you use, you still get all of AutoSleep’s insights, ratings and other sleep features.

What happens on other days?

Nothing changes permanently.

The automatic switch to Sleep Analysis applies only to the affected day. When you select another day, AutoSleep automatically returns to Sleep Stage mode.

What if my Sleep Stages appear later?

Sometimes the Sleep Stage data may appear in Apple Health later.

If you can now see the sleep stages in Apple Health, tap the Sleep Session graph in AutoSleep, then use the switch above the graph to turn Sleep Stage mode back on for that day.

How can I prevent this?

Make sure Sleep Focus is turned on when you go to sleep and turned off when you wake up.

If you use an Apple Sleep Schedule, your iPhone and Apple Watch can manage Sleep Focus automatically.

In short: If Apple Sleep Stage data aren't available, AutoSleep temporarily uses its own Sleep Analysis so you can still see useful sleep data. Your preferred Sleep Stage mode remains available for your other days.