Trends

Korea's Sleep-Tech Trend: What the Data Says About Time in Bed vs Sleep, and Habits to Try

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AI-generated bedside scene with a face-down phone, a softly glowing lamp and the handwritten words a little more rest.

AT A GLANCE

Reported data
6 h 39 min in bed, 5 h 25 min asleep (Korean users of Asleep, 2024–2025 data; ZDNet Korea, March 2026)
Sleep tech
Technology that measures or supports sleep: apps, wearables and more
Caution
A sleep score is not a diagnosis; see a health professional for persistent problems
Habits
Consistent bedtime, dim screens, dark cool bedroom, limit late caffeine (NHLBI)

In March 2026, ZDNet Korea reported that Korean users of the sleep-tech company Asleep spent 6 hours 39 minutes in bed but slept 5 hours 25 minutes. This guide explains what the data does and does not show, what sleep tech is, and which general sleep habits public-health sources recommend. Checked on 2026-10-12.

The hero image is AI-generated and is not a photo of a room or a sleep-treatment product.

Time in bed is not always time asleep

The report analyzed user data collected in 2024–2025 (ZDNet Korea, in Korean). The full company report was not independently available, so these are reported findings from a user dataset, not a confirmed national average. The gap between time in bed and time asleep does not measure time spent scrolling. It can include time before falling asleep and time awake during the night.

Other numbers in the report

Asleep’s “2026 Korea Sleep Report,” as covered by ZDNet Korea, analyzes data from 370,774 users from January 2024 to December 2025, across 5,562,192 measured days.

  • Bed time vs. sleep time: 6 hours 39 minutes in bed against 5 hours 25 minutes asleep, a gap of 1 hour 14 minutes.
  • Sleep quality: average sleep efficiency of 82%, an average of 39 minutes awake during sleep and a social jet lag of 33 minutes.
  • Body clock: 56.2% evening types, 34.5% intermediate and 9.3% morning types. Teens were the most evening-leaning at 85.2%, against 37.8% for people in their 60s and up.
  • Sleep onset: Korea’s average was 12:51 a.m., later than the US (12:24), Asia (12:26) and Europe (12:27).
  • Efficiency gap: falling asleep between 11 p.m. and midnight gave the highest efficiency at 83.8%, against 76.2% after 3 a.m.

All of this falls short of the recommended 7 to 8 hours of sleep.

What sleep tech is

“Sleep tech” is a broad name for technology that measures or supports sleep. Asleep, for example, describes software that estimates sleep patterns from breathing sounds recorded near a bed (Asleep product page). That is the developer’s description of its technology, not a promise that using it will help someone sleep better.

An app, a wearable tracker and a medical treatment are different things. A sleep score can help you notice patterns, but it cannot tell the whole story of how you feel or replace an assessment of persistent symptoms.

Habits to try without buying anything

The US National Heart, Lung, and Blood Institute recommends habits such as these (NHLBI healthy sleep habits):

  • Keep bedtime and waking time fairly consistent.
  • Use the hour before bed for quieter activities and less bright screen light.
  • Keep the bedroom dark, quiet and cool.
  • Watch late caffeine, since its effects can last up to eight hours.

These are general habits, not a treatment plan. If sleep problems persist or affect daily life, a health professional can help assess them (NHLBI insomnia guidance).

Good for / not for

Good for

  • Anyone curious about how sleep tech is described in Korea
  • People who want simple habits to try

Not for

  • Anyone looking for medical advice. Talk to a professional about persistent sleep problems.

FAQ

Is 5 hours 25 minutes a national average? No. It comes from Asleep’s user data as reported, not a national survey.

Does a sleep score diagnose anything? No. It is a tool for noticing patterns.

Do I need an app? No. The habits above need no purchase.

Sources

Checked on 2026-10-12. This is general information, not medical advice.