7 Best Free Sleep Tracking Apps of 2025
Explore the 7 best free sleep tracking apps to analyze sleep quality.
TABLE OF CONTENTS
You can’t improve your sleep if you don’t know what’s happening at night. If you’ve been waking up groggy or struggling to fall asleep, sleep tracking apps for better sleep can show you exactly how long and how well you rest.
With the right app, you can track deep sleep, light sleep, and awake time, right from your phone or smartwatch. You’ll see patterns, find triggers, and start building habits that actually help you recover. The best part: many of the most accurate options today are completely free sleep tracking apps.
In this guide, you’ll find the 7 best free sleep tracking apps of 2025, reliable tools that help you understand your sleep quality, improve recovery, and wake up with more energy every day.
What to Look For In the Best Sleep Tracking Apps
Most sleep trackers can tell you how long you were in bed - but that’s not the same as knowing how well you slept.
A good sleep tracking app should do more than count hours; it should help you understand why you wake up tired and what’s actually happening during the night.
Focus on how well the app fits into your actual routine and how reliable the data feels over time.
A genuinely useful sleep tracker should:
- capture light, deep, and REM sleep stages accurately
- sync seamlessly with your wearables or health data
- offer smart alarms that wake you at the right moment, not mid–deep sleep
- protect your privacy without locking insights behind paywalls
- Use a minimal battery so it can run nightly without interruption
If you go to bed at 11 p.m. and wake at 7 a.m., your app should know how much of that time you truly slept - not just that you stayed still.
The goal isn’t to find the most feature-packed tracker, but the one that helps you actually sleep better. A good app gives you clear, accurate feedback with minimal effort, so you can focus on rest, not data.
Quick Comparison: Sleep Tracking Apps at a Glance
App | Platform | Best For | Free Version | Accuracy |
Sleep Cycle | iOS, Android | Smart alarms and sound-based tracking | Yes – core features free | Moderate (60–70%) |
SleepScore | iOS, Android | Non-wearable users who want detailed insights | Yes – limited free version | High (70–80%) |
Pillow | iOS, Apple Watch | Apple users who want health integration | Yes – basic sleep reports free | High (75–85%) |
Sleep as Android | Android | Custom setup and wearable syncing | Yes – most features free | High (75–85%) |
Samsung Health | Android, Galaxy Watch | Galaxy users wanting full ecosystem tracking | Yes – built-in and free | High (80–90%) |
Sleep++ | iOS, Apple Watch | Apple Watch users wanting simple, automatic tracking | Yes – completely free | High (80–85%) |
ShutEye | iOS, Android | Users wanting detailed sleep tracking + sleep aid features | Yes – core tracking free | Reported high |
7 Best Free Sleep Tracking Apps
1. Sleep Cycle
Sleep Cycle is a phone-based sleep tracker that monitors your breathing and movement throughout the night. It analyzes these signals to estimate your sleep stages and uses that data to wake you at the best moment within a preset window.
You don’t need a smartwatch - your phone alone is enough. It provides charts showing light, deep, and REM sleep, along with a “sleep quality” score. The app also learns patterns over time, showing how factors like bedtime or late-night activity affect your rest.
Its smart alarm and simplicity make it one of the most approachable tools for new users.
Things that work great:
- Smart alarm that adapts to your sleep cycles and reduces morning grogginess
- Clean data visualization with clear graphs and sleep quality scoring
- Reliable phone-only tracking that doesn’t require a wearable
- Intuitive interface that works smoothly across both iOS and Android
Things that might bother you:
- Sound and snore recording features are locked behind the premium plan
- Sensor accuracy can vary based on background noise or phone placement
- Limited depth in long-term trend analysis compared to wearable-based tools
Why & When to Choose:
Use Sleep Cycle if you want an easy, phone-only app that tracks sleep patterns and helps you wake up better - no extra setup or gadgets needed.
2. SleepScore
SleepScore tracks sleep using sonar technology that measures your breathing and movement through sound waves - no contact or wearable needed. It creates a sleep score each morning, breaking down your rest into stages and efficiency.
The app includes clear insights into how long you stayed in deep or REM sleep and gives tips to improve rest quality over time. Because it’s backed by validated sleep research, the data feels credible and consistent.
Its accuracy, combined with ease of use, makes it one of the most trustworthy non-wearable trackers available.
Things that work great:
- Contact-free sonar technology that tracks breathing and movement with strong precision
- Detailed sleep stage analysis backed by scientific validation
- Personalized sleep improvement tips generated from nightly data
- Easy setup and daily sleep score summaries that are simple to interpret
Things that might bother you:
- Requires the phone to stay at a specific angle and distance for consistent accuracy
- Free version limits long-term data and historical comparisons
- Interface feels functional but less modern compared to newer apps
Why & When to Choose:
Pick SleepScore if you want precise, science-backed sleep data without wearing a smartwatch or fitness band.
3. Pillow
Pillow is a polished sleep tracking app built for Apple users. It connects directly with Apple Health and uses the Apple Watch or iPhone sensors to record sleep stages, heart rate, and sounds.
Tracking starts automatically if you wear your Apple Watch, and you can view colour-coded charts each morning. The free version gives solid summaries, while the paid plan unlocks sound recordings and trend history.
Its deep iOS integration and clean design make Pillow one of the most user-friendly sleep apps available.
Things that work great:
- Deep integration with Apple Health and Apple Watch for seamless data syncing
- Automatic tracking that starts as soon as you go to bed with your watch on
- Detailed visual breakdown of heart rate, sleep stages, and movement
- Modern, well-designed interface that feels native to iOS users
Things that might bother you:
- Advanced features like snore analysis and trend history require the premium plan
- No Android version, limiting cross-platform use
- Free-tier data export and customization options are minimal
Why & When to Choose:
Choose Pillow if you’re an Apple Watch user who wants detailed sleep reports and a clean, built-in experience.
4. Sleep as Android
Sleep as Android is one of the most advanced sleep trackers for Android. It uses your phone or connected wearable to detect movement, sound, and breathing patterns. It can even record snoring and ambient noise using sonar.
The app pairs with major wearables like Galaxy Watch, Fitbit, and Wear OS devices, and integrates with Google Fit and health apps. It also features a smart alarm that wakes you during light sleep, helping you start the day alert.
Sleep as Android offers strong customization and depth for users who want more control.
Things that work great:
- Supports a wide range of wearables, including Galaxy Watch, Fitbit, and Wear OS
- Offers advanced sonar tracking and snore recording options
- Smart alarm intelligently detects light sleep for gentler wake-ups
- Highly customizable settings for data, alarms, and integrations
Things that might bother you:
- Interface design feels dated compared to newer sleep apps
- Some features, like sound-based tracking, require initial calibration
- Steeper learning curve for non-technical users due to deep customization options
Why & When to Choose:
Choose Sleep as Android if you want deep data control and flexible integrations - perfect for tech-savvy Android users.
5. Samsung Health
Samsung Health comes built into most Galaxy devices. It automatically tracks sleep duration, stages, and snoring through your Galaxy Watch or phone. The app generates a daily sleep score and gives feedback on your routine.
Sleep data appears alongside other health metrics like activity and stress, making it a solid all-around wellness dashboard. It also includes coaching features that suggest small changes to improve sleep habits.
Because it’s fully integrated into Samsung’s ecosystem, it’s both accurate and effortless to use.
Things that work great:
- Built-in app that offers accurate sleep tracking at no extra cost
- Detailed sleep scoring with stage analysis, snore detection, and oxygen monitoring
- Smooth integration with Galaxy Watch sensors for precise data collection
- Includes personalized sleep coaching and long-term trend insights
Things that might bother you:
- Works best only with Samsung devices; limited support for other ecosystems
- Data exports and third-party integrations are restricted
- Coaching recommendations can feel generic without deeper personalization
Why & When to Choose: Use Samsung Health if you own a Galaxy phone or watch and want automatic, accurate sleep tracking built right into your device.
6. Sleep++
Sleep++ is a simple and reliable sleep tracker built specifically for Apple Watch users. It automatically records your sleep whenever you wear your watch to bed and syncs the data directly to Apple Health.
The app focuses on clarity and ease of use. Each morning, it shows how long you slept and breaks the night into awake, light, and restful periods. It doesn’t overwhelm you with extra metrics - instead, it gives clean insights you can actually use.
Sleep++ runs entirely in the background, so once set up, it requires no manual input. For users who prefer automation and minimal effort, it’s one of the most seamless options on iOS.
Things that work great:
- Automatic sleep tracking through Apple Watch sensors
- Integrates smoothly with Apple Health
- Simple charts and summaries that load instantly
- Fully free — no subscriptions or upgrades required
Things that might bother you:
- Limited to basic sleep stage data — no snore or heart rate insights
- Works only with Apple Watch, not iPhone alone
- Minimal customization for reports or visual themes
Why & When to Choose:
Choose Sleep++ if you want a set-it-and-forget-it app for your Apple Watch. It’s best for people who prefer accurate, automatic tracking without managing extra settings or subscriptions.
7. ShutEye
ShutEye tracks your sleep using your phone’s microphone and sensors - no wearable needed. It analyzes sounds and breathing to estimate sleep stages, total rest time, and quality.
The app also includes a built-in library of white noise, ambient sounds, and bedtime stories that help you fall asleep faster. Each morning, it shows your sleep score, stage breakdown, and any noises it detected during the night.
ShutEye works well for users who want both tracking and relaxation tools in one place.
Things that work great:
- Tracks sleep automatically using only your phone
- Offers sleep-stage breakdown and sleep quality score
- Includes snore and night sound recording
- Comes with white noise and ambient sound options
Things that might bother you:
- Accuracy depends on quiet surroundings and phone placement
- Some detailed insights and sleep aids require the premium version
- Less precise than wearable-based tracking
Why & When to Choose:
Choose ShutEye if you want a phone-only sleep tracker that also helps you fall asleep. It’s best for users who prefer simplicity and built-in sleep aids over wearable integrations.
How to Use Your Sleep Data to Improve Focus and Productivity
Tracking your sleep is just the start. The real value comes when you use that data to guide how you plan your day. This is where Focuzed.io helps. It’s a smart, energy-aware daily planner that connects your sleep patterns with how you focus during the day.
You can sync data from your sleep tracking app or enter your rest details manually, and Focuzed.io learns when you’re most alert, creative, or tired.
It then uses that rhythm to shape your day:
- Schedule deep work when your energy is high
- Plan admin or light tasks during slower hours
- Adjust your workload when poor sleep lowers your focus
If your tracker shows shorter deep sleep or restless nights, you’ll see the effect in your energy curve inside Focuzed.io. Over time, you’ll understand how rest drives productivity - and how to plan around it.
Your sleep tracker tells you how well you recovered. Focuzed.io helps you turn that recovery into better focus.
Final Verdict: How to Choose the Right Sleep Tracking App for You
There is no single best sleep tracking app for everyone. The right one depends on your habits, devices, and how you plan to use the data. Some people need only basic sleep duration tracking, while others want detailed insights into stages, recovery, and quality.
Choose an app that fits your routine and gives clear, accurate data you can act on. Track consistently to see patterns and understand what affects your rest. Small, steady improvements are more valuable than complex features you never use.
If you want to use your sleep data to improve focus and energy during the day, Focuzed.io helps align your schedule with your recovery. It turns sleep insight into practical action.
Sleep tracking is useful only when it helps you change how you rest, plan, and work - not when it just measures your nights.
Frequently Asked Questions
1. Are free sleep tracking apps safe?
Most free sleep tracking apps are safe to use if downloaded from trusted sources like the App Store or Google Play. Always review the app’s privacy policy before use. Choose apps that store your data locally or clearly explain how they handle your sleep and sound recordings.
2. How accurate are free sleep tracking apps compared to wearables?
Phone-based apps estimate sleep stages using motion and sound, while wearables use heart rate and body movement. Wearable-based tracking is generally more accurate, but phone-based apps can still give reliable trends when used consistently.
3. Do sleep tracking apps record my conversations?
Apps that detect snoring or night sounds may record short clips for analysis. These are usually stored locally and can be deleted anytime. Always check app permissions and disable sound recording if you’re not comfortable.
4. Can sleep tracking apps improve my sleep quality?
Yes - tracking helps you notice habits that affect rest, like bedtime, caffeine, or screen time. Consistent data shows what improves or harms your sleep, helping you make small changes that lead to better recovery.
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