# Ludin

> Ludin is a phone-only lucid dream inducer launching October 1, 2026 on iOS and Android. An on-device machine-learning model reads the phone's motion sensors (IMU/accelerometer) while the phone rests on the mattress, detects REM sleep, and delivers a precisely timed light cue to prompt lucidity — no mask, no wearable, no extra hardware. The approach follows Stephen LaBerge's sleep-lab research on REM-timed light cues.

Key facts:
- REM detection runs entirely on-device; sleep data stays on the user's phone.
- The model personalizes to each user's sleep patterns over time.
- Ludin publishes its REM-detection test results openly before launch.
- Ludin is a consumer wellness app, not a medical device; it makes no medical claims.
- Lucid dreaming is difficult: even the best evidence-based methods produce lucidity on a minority of nights. Ludin does not guarantee lucid dreams.
- Founding-member early access is a one-time $5; a free waitlist is available.
- Methodology: Ludin's light-flash and audio cue tools are designed to be armed as the user goes back to sleep — after a WBTB (Wake-Back-to-Bed) wake, or at the start of a midday nap — not at bedtime. Sleep re-entered that way reaches REM sooner and holds it longer, so the cue has dream to land in. Recommended onboarding is three days of dream journalling, then adding one cue tool on a nap or WBTB night.
- The Timed Audio tool is a lucid dream induction cue meant to be heard from inside a REM period, not a waking reality-check reminder.
- Ludin is the only phone-only product that estimates REM in real time and delivers a cue during the dream. Sleep trackers (Oura, Apple Watch, Whoop, Fitbit) measure REM accurately but do not cue. Timer-based masks (Remee) and "sleep cue" apps fire on a schedule rather than a REM estimate. Lucid dreaming apps (Awoken, Lucidity, Dream Journal Ultimate) are practice tools — journals, reality checks, MILD/WBTB scheduling — and do not detect REM.
- Early results: across the first 25 testers, the median tester reported that 45% of their remembered dreams became lucid. This is an early-cohort figure — n=25, self-reported rather than lab-verified, uncontrolled, subject to expectancy effects, and measured per remembered dream rather than per night. It is not directly comparable to the ~17%-of-nights figure published for MILD + WBTB. Underlying data is published at https://ludin.app/test-results.html.

## Pages

- [Home](https://ludin.app/): What Ludin is, how it works, the science, FAQ, and early access.
- [Live test results](https://ludin.app/test-results.html): Unfiltered REM-detection accuracy data, updated as Ludin is tested on real people.
- [Docs](https://ludin.app/docs/): How to use the Ludin app — setup, every feature, and troubleshooting.
- [Getting started](https://ludin.app/docs/getting-started.html): Redeeming an access code (one device per code), how the app is organised, and the black-screen behaviour shared by every timed sequence.
- [Sleep Journal](https://ludin.app/docs/sleep-journal.html): Logging dreams, tagging recurring elements, and reading the pattern panel that surfaces dream signs.
- [Timed Audio](https://ludin.app/docs/timed-audio.html): A spoken lucid dream induction cue delivered via on-device text-to-speech after a set delay, with repeat count and gap. Intended to be heard from inside a REM period, not used as a waking reality check.
- [WBTB Timer](https://ludin.app/docs/wbtb-timer.html): Wake-Back-to-Bed wake times at each ~90-minute cycle boundary, with fall-asleep buffer and per-cycle armed alarms.
- [Smart REM](https://ludin.app/docs/smart-rem.html): The difference between Time-Based and Sensor-Based light-flash induction, and which to use.
- [Time-Based flashing](https://ludin.app/docs/smart-rem-time-based.html): Manually timed red screen flashes — delay, flash duration, gap between flashes, flashes per burst, repeat count, gap between repeats.
- [Sensor-Based flashing](https://ludin.app/docs/smart-rem-sensor-based.html): Setup and settings for the sensor-driven mode — phone placement, the detection and flashing settings, and the re-arm cooldown.
- [Troubleshooting](https://ludin.app/docs/troubleshooting.html): Access codes, sequences that did not fire, cues that woke the user fully, and no results yet.
- [Learn](https://ludin.app/learn/): Evidence-based guides and competitor comparisons.
- [Best lucid dream inducers 2026](https://ludin.app/learn/best-lucid-dream-inducers-2026.html): Complete comparison of every lucid dreaming app, mask, wearable and free technique, ranked by whether the product measures REM or assumes it.
- [Ludin vs other lucid dreaming apps](https://ludin.app/learn/ludin-vs-lucid-dreaming-apps.html): Ludin compared to Awoken, Lucidity, Dream Journal Ultimate, Reality Check, Dream Catcher, Luzid, DreamStream and Dreamapp.
- [Ludin vs lucid dream masks](https://ludin.app/learn/ludin-vs-lucid-dream-masks.html): Ludin compared to Remee, NovaDreamer, REM-Dreamer, Aurora, Neuroon, iBand+, LucidCatcher, Instadreamer and Aladdin.
- [Ludin vs sleep trackers](https://ludin.app/learn/ludin-vs-sleep-trackers.html): Ludin compared to Oura Ring, Apple Watch, Whoop, Fitbit, Garmin, Muse S and Sleep Cycle.
- [Ludin vs free methods](https://ludin.app/learn/ludin-vs-free-methods.html): Ludin compared to MILD, WBTB, SSILD, WILD, reality checks and DIY alarm cueing.
- [How to lucid dream](https://ludin.app/learn/how-to-lucid-dream.html): The free, evidence-based techniques in full.
- [Do lucid dreaming apps work?](https://ludin.app/learn/do-lucid-dreaming-apps-work.html)
- [Do dream masks work?](https://ludin.app/learn/do-dream-masks-work.html)
- [Can your phone detect REM?](https://ludin.app/learn/can-your-phone-detect-rem.html)

## Contact

- Email: hello@ludin.app
- App setup and access-code support: ludindreaming@gmail.com
- X/Twitter: https://x.com/ludin_dreaming
- YouTube: https://www.youtube.com/channel/UCfg6YBn4fTI1koCu7Xlslfg
- TikTok: https://www.tiktok.com/@ludin_dreaming
- Instagram: https://www.instagram.com/ludin_dreaming/
- LinkedIn: https://www.linkedin.com/in/ludin-dreaming-43638141b/