Ludin
Lucid dreaming from your phone
No mask. No wearable.
Ludin reads your sleep from your phone's motion sensors, waits for REM, then sends a precisely timed light cue. It's a science-based method to achieve lucidity, using a device you already have access to.
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Thanks for the leap of faith. We'll be in touch as we test Ludin in the open, and we'll share the story as it unfolds.
What Ludin is
A light cue, delivered at exactly the right moment of your dream.
Lucid dreaming means becoming aware that you're dreaming while it's still happening. One of the most reliable ways to trigger it is a light cue during REM sleep: a gentle signal that slips into the dream and reminds you to notice where you are.
This traces back to Stephen LaBerge's sleep-lab research and the dedicated dream masks built on it. Ludin brings that same approach using the phone in your hand. Dream masks are expensive, uncomfortable, and require a separate device. Ludin is an app that runs on just your phone, with no extra hardware to buy.
How it works
Three steps. Zero extra hardware.
Place your phone on the mattress
Open Ludin before you sleep. Your phone's motion sensors pick up the subtle movement signature of your sleep stages.
On-device ML finds your REM
A machine-learning model running locally detects REM sleep — and gets better at reading your patterns the longer you use it.
A timed light cue fires
At the right moment, the screen delivers a gentle light cue that slips into the dream — your reminder to notice you're dreaming.
Curious what the cue feels like?
The hard part is timing
Every attempt before us failed on the same fixable problem.
Light cues only work if they land during specific stages of REM, and getting that timing right is exactly where other attempts fell short. Ludin uses a machine learning model running on your phone's motion sensors to detect REM, with no mask, no wristband, and nothing extra to buy.
It's also built to get better at reading your sleep the longer you use it, learning your patterns, locally on your device, over time.
| Ludin | Dream masks | Typical apps | |
|---|---|---|---|
| Extra hardware to buy | None — just your phone | $100+ mask | None |
| REM-timed light cues | ✓ ML-timed, on-device | ✓ but imprecise timing | ✗ fixed timers / audio |
| Comfortable to sleep with | ✓ nothing on your face | ✗ mask all night | ✓ |
| Learns your sleep over time | ✓ personalizes locally | ✗ | ✗ |
| Results shared publicly | ✓ tested in the open | ✗ | ✗ |
Straight with you
No app can hand you a lucid dream on demand. Ours included.
Lucid dreaming is hard — even the best evidence-based methods produce lucidity on a minority of nights, and anyone promising otherwise is selling folklore. What we can promise is a new approach, tested on real people, and shared as we go. Every public claim we make stays one notch behind the evidence we've earned. If you like watching something get built in the open and pressure-tested by skeptics, you're in the right place.
Tested in the open
Don't take our word for it. Watch the data.
We publish our REM-detection test results live — wins, misses, and everything between — as we validate Ludin on real people ahead of launch.
FAQ
Questions we get a lot.
Be there when the lights come on.
Launching September 1, 2026. Join free, or lock in founding-member early access for $5.