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DreamKnock
Your Apple Watch senses REM and cues you into lucid dreams
DreamKnock turns your Apple Watch into a lucid dreaming trainer. While you sleep, it senses REM from heart-rate dynamics and wrist stillness, then plays a gentle haptic rhythm β quiet enough to slip into the dream instead of ending it. Train the rhythm by day with reality checks, so at night it means one thing: this is a dream. Wake to a map of your night: REM windows, cues, trends, dream journal. 100% on-device β no servers, no accounts. PH exclusive: 3 months free (see promo code) π
Hey Product Hunt π
I'm the solo dev behind DreamKnock. Quick backstory: I've always been fascinated by the old sleep-lab experiments where researchers flashed lights at dreamers during REM and the light leaked into the dream β sometimes as a flicker, sometimes as something the dreamer recognized and used to realize they were dreaming. I tried an LED sleep mask once and lasted exactly two nights (I can't sleep with something on my face).
Then I realized the Apple Watch I already sleep with has everything needed to do the same trick without a mask: it can read heart rate, sense wrist stillness (your body goes nearly paralyzed in REM), and vibrate β silently. So DreamKnock infers likely REM from that signature and taps out a soft, distinctive rhythm into it. You train the same rhythm during the day with reality checks, so at night it means one thing to your dreaming brain: this is a dream.
Everything runs on-device β no servers, no accounts, nothing leaves the watch. 7-day free trial so you can actually test a full week of nights before paying anything.
Two questions I'd love this community's take on:
If you've tried any cue-based induction (masks, sound, apps) β what made you stick with it or abandon it?
Would you want the cue timing to adapt automatically (heavier late in the night when REM is longer), or would you rather control it manually?
Happy to answer anything about how the detection works, the App Review process (fighting Apple's toolchain was its own adventure), or the sleep science behind it. π
honestly this looks really cool and the on-device approach is great. one thing i'd love to see is a sleep talk or whisper mic option for capturing mumbled dream snippets right after a REM window, since typing them out in the morning usually wipes the memory anyway.
Apple Watch user here, this looks genuinely useful. One thing I'd love: let me pick the haptic pattern myself, maybe a custom tap sequence I design in the app. That way the cue feels more personal and less like a generic notification I might half-dismiss in my sleep.
the haptic rhythm thing is genuinely clever, using one signal for two different contexts and letting your brain learn the association through the daytime training sessions. really thoughtful execution honestly
the gentle haptics feel like a nudge rather than a jolt, and i actually stayed asleep through them. waking up to a clean map of my REM windows makes the whole thing feel worth it.
honestly the idea of a haptic cue that doesn't wake you is so cool. one thing though, would be great to export the dream journal as plain text or pdf. some of us like to move journals between apps or back them up outside the watch.
About DreamKnock on Product Hunt
βYour Apple Watch senses REM and cues you into lucid dreamsβ
DreamKnock was submitted on Product Hunt and earned 9 upvotes and 7 comments, placing #128 on the daily leaderboard. DreamKnock turns your Apple Watch into a lucid dreaming trainer. While you sleep, it senses REM from heart-rate dynamics and wrist stillness, then plays a gentle haptic rhythm β quiet enough to slip into the dream instead of ending it. Train the rhythm by day with reality checks, so at night it means one thing: this is a dream. Wake to a map of your night: REM windows, cues, trends, dream journal. 100% on-device β no servers, no accounts. PH exclusive: 3 months free (see promo code) π
DreamKnock was featured in Health & Fitness (82.9k followers), Meditation (12.7k followers) and Wearables (182.6k followers) on Product Hunt. Together, these topics include over 35.5k products, making this a competitive space to launch in.
Who hunted DreamKnock?
DreamKnock was hunted by dream. A βhunterβ on Product Hunt is the community member who submits a product to the platform β uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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