Comparison

Sleep Cue vs Lucidly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sleep Cue

This app serves as an interactive companion for a wireless brainwave headband. It displays real-time EEG signals and brainwave power spectrograms, enabling users to trigger custom cues based on sleep stages and brainwave activity for lucid dreaming.

Highlights
  • Real-time EEG signal viewing
  • Brainwave power spectrogram
  • Customizable cue triggering
  • Lucid dream induction techniques
  • Research collaboration opportunities
Features
Read full description

An interactive companion app for the Enchanted Wave wireless brainwave headband. 1. The app allows users to view the raw EEG signal, and the power spectrogram of brainwave signals in real time. 2. The protocols allows the user to trigger pre-selected cues with a specific logic combination defined by time, sleep stage, and EEG band power strength. 3. The existing protocols include popular and novel techniques for lucid dream induction. We are open to work with both individual and institutional researchers on customized protocols. Please visit https://enchantedwave.square.site/ for more details.

About

Lucidly

This app uses AI and your smartwatch to detect REM sleep. It alerts you during this phase, allowing you to attempt lucid dreaming. It supports various induction techniques and offers two modes for sleep entry or REM detection.

Highlights
  • Real-time REM prediction
  • AI-driven sleep stage detection
  • Haptic and audible alerts
  • Two operating modes (Inference & Hypnagogic)
  • Adjustable prediction thresholds and alerts
  • Session analytics and charts
  • Apple HealthKit integration
Features
Read full description

Lucidly collects health readings while you are sleeping via the watch. The readings are evaluated using artificial intelligence to determine when you have entered rapid eye movement (REM) of your sleep cycle. When REM is detected, the watch will alert you by triggering tactile and or audible signals. The user can attempt to recognize the signal in their dreaming state, or wake up and attempt to reenter REM via any lucid dreaming induction method of choice. Lucidly is the first and only application that specifically targets this phase of the sleep cycle using health readings in combination with machine learning and haptic signaling. The application works well and supports WILD, WBTB, DEILD and DILD induction techniques, and is available in two operating modes: Inference (REM detection and alerts), and hypnagogic (periodic haptics for sleep entry). Lucidly integrates with Apple's health kit for functionality. User permission is required to read and write data. REM prediction is performed by neural networks while the application is in session and the user is asleep. Lucidly has an overall accuracy > 80%. REM inference is an approximation and results may vary. Familiarity and some experience with lucid dreaming induction techniques is recommended before subscribing. Lucidly provides the following features: - Real time REM prediction with auto shut-off tactile and audible signaling. - REM stage determined by artificial neural networks (AI). - Greater than 80% model accuracy. - Two operating modes: Inference and hypnagogic. Modes can run in tandem or independently. - Ability to adjust prediction thresholds, haptics, session and alert durations. - Analytics and charts generated for each session with notification timestamps. - Seamlessly integrates and displays Sleep App metrics. - Ability to playback sessions and test different settings against REM detection models. - No registration required to use the application. - No personally identifying information is collected. - Subscriptions are auto-renewable and can be cancelled any time. - All plans include a FREE 7-day trial. =============== IN-APP PURCHASE: Monthly: $5.99 Yearly: $39.99 ($3.33 / mo) - Payment will be charged to iTunes account at confirmation of purchase. - Subscriptions automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. =================== BEFORE YOU SUBSCRIBE: Lucidly requires Apple Watch for functionality. This application will not work without a paired Apple Watch and installed companion Lucidly WatchOS application. Familiarity and some experience with lucid dreaming induction techniques is recommended. Read our Privacy Policy at: https://lucidly-public.s3.us-east-2.amazonaws.com/privacy_lucidly.html Read our Terms of Service at: https://lucidly-public.s3.us-east-2.amazonaws.com/terms_lucidly.html

Screenshots

Sleep Cue4 screens
Lucidly4 screens

Verdict

The call

The clearest difference is review sentiment: Sleep Cue at 100% against Lucidly's 44%. Sleep Cue also leads on rating (5.0 vs 3.3) and in-app purchases (none vs 2). Lucidly's advantage is update cadence (weekly vs every 3 months) and ratings volume (18 vs 4). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Lucidly sells 2 in-app purchases, starting at $5.99 per month. Sleep Cue asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sleep Cue holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 18 respectively. Written reviews point the same way: 100% of Sleep Cue's written reviews are positive against 44% of Lucidly's.

UpkeepUpdate frequency

Sleep Cue ships an update every 3 months, Lucidly weekly. Both last shipped on July 5, 2026.

Scorecard7 real differences · 3 level
Sleep Cue versus Lucidly: the parameters behind the verdict, then further details
ParameterSleep CueLucidly
PriceFreeFree
Rating5.0 (4 ratings) — better3.3 (18 ratings)
Positive reviews100.0% of reviews — better43.8% of reviews
Number of ratings418 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS11.0 — better13.4
Further details — not scored
Size157 MB110 MB
Age rating4+9+
DeveloperEnchanted Wave LLC5Path LLC

Customer experience

Sleep Cue

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Lucidly

All ratings18 ratings
Positive50.0%
Neutral16.7%
Negative33.3%
Written reviews16 reviews
Positive43.8%
Neutral18.8%
Negative37.5%

In-app purchases

None

Sleep Cue

No in-app purchases

2 purchases

Lucidly

Subscriptions2
  • Monthly Access7 Days trial$5.991 Month
  • Annual Access7 Days trial$39.991 Year

Questions

Is Sleep Cue free?
Sleep Cue is free to download, with no in-app purchases.
Is Lucidly free?
Lucidly is free to download, with in-app purchases available.
Which has better reviews, Sleep Cue or Lucidly?
Sleep Cue is rated higher. Sleep Cue averages 5.0 out of 5 from 4 ratings, while Lucidly averages 3.3 from 18 ratings.
Do Sleep Cue or Lucidly have ads?
Neither Sleep Cue nor Lucidly shows ads.
Which is updated more often, Sleep Cue or Lucidly?
Sleep Cue ships an update every 3 months, and Lucidly weekly. Most recently, Sleep Cue was updated on July 5, 2026 and Lucidly on July 5, 2026.

Other comparisons