Sleep Cycle
Smart alarm clock that analyzes nighttime sounds to wake you up during light sleep phase.
- What it is
- Smart alarm clock that analyzes nighttime sounds to wake you up during light sleep phase.
- Best for
- Sleep cycle tracking · Scheduled smart alarm · Nighttime sound analysis
- Platforms
- iOS · Android · Apple Watch
Strengths
- Sleep analysis via microphone, no accessories required
- Snore and cough detection
Weak points
- Limited accuracy compared to a dedicated sensor
- Microphone active at night, a consideration for privacy
What is Sleep Cycle?
Sleep Cycle is a mobile sleep tracking and smart alarm application. It uses the device motion sensors or sound analysis to identify the user's different sleep phases during the night. The tool includes a smart alarm feature that triggers the alarm during a light sleep phase, within a defined window before the scheduled wake-up time. The application also generates statistics and graphs based on data collected during rest periods.
At a glance
- Type
- App
- Platforms
- iOS, Android, Apple Watch
- Subscription required
- No
- Free trial
- Yes
- French
- Yes
- Availability
- France, Canada, International
- Uses AI
- Yes
- Evidence level
- Partial clinical validation
This information is indicative and may change: only the publisher's own website is authoritative.
What the AI does: The application uses patented AI sound analysis technology to detect sleep phases and nighttime noises, as well as an AI coach named Luma for personalized tips.
Who uses Sleep Cycle?
Mobile users
Individuals using a smartphone on iOS or Android who wish to track their sleep habits.
Key features
Sleep analysis
Uses the accelerometer or microphone to detect movements and sounds during the night.
Smart alarm
Triggers the alarm within a 30-minute window during the light sleep phase.
Detailed statistics
Visualization of sleep data via graphs and daily reports.
Sleep aids
Access to soundscapes and sleep stories in the premium version.
Pricing
Sleep Cycle offers a free version and a Premium subscription. The annual Premium plan is US$39.99 in the US and CA$54.99 in Canada.
Pricing recorded on November 1, 2026. Excluding taxes and shipping. Prices change: the amount that applies is the one shown by the publisher's own checkout.
Free version
Free
Access to basic features such as sleep tracking and smart alarm.
- Sleep tracking
- Smart alarm
Premium version
US$39.99 / year or CA$54.99 / year
Annual subscription unlocking all features, advanced analysis, and AI coach.
- Advanced analysis
- Snore detection
- AI coach Luma
- Sound library
Prices vary based on promotional offers and regions. It is recommended to check the subscription section directly in the application to determine the exact price applicable to your account.
Use cases
Nighttime tracking
The user places their phone near the bed to record movements or sounds.
Outcome: Generation of a graph illustrating the distribution of sleep phases.
Scheduled alarm
The user sets a wake-up time and a tolerance window.
Outcome: The alarm sounds at the moment determined optimal by the application.
How it works in practice
Tracking configuration
- 1Open the application before bed
- 2Place the phone on the nightstand
- 3Enable tracking mode
In your daily routine
Compatibility
Available on iOS and Android, with possible integration with Apple Health.
Known limits
Data accuracy
The application uses estimates based on movement or sound and does not replace a medical examination.
Hardware dependency
Operation requires the phone to remain active and correctly positioned during the night.
Consider something else if
- Medical polysomnography devices
- Tracking applications without sound sensors
How to use it
Installation
Download the application from the App Store or Google Play.
Setup
Set the desired wake-up time and allow access to the microphone or sensors.
Frequently asked questions
Can Sleep Cycle diagnose sleep disorders?+
No, the application is a tracking tool and does not provide any medical diagnosis.
How does the application detect sleep?+
It uses the accelerometer to capture movement or the microphone to analyze sounds emitted during the night.
Does the application work without a subscription?+
Yes, a free version is available with limited features.
Must the phone remain plugged in?+
It is recommended to keep the phone charging during the night to avoid battery depletion.
How do I cancel a subscription?+
Cancellation must be performed via the subscription management settings of your App Store or Google Play account.
Sources
Evidence level shown: Partial clinical validation
Reviews of smartphone sensor tracking applications conclude they have partial accuracy compared to polysomnography: total sleep time is approximated, but sleep stages are not reliable. No independent validation for this application is published.
No published source specific to this product has been identified so far.
Background on the approach
General references on the category or technology: they do not cover this specific product.
These references cover the approach or technology, not an evaluation of the product by us. None of these links is an affiliate link. Read our method.
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