Smartphone and tablet sleep tracking has come a long way, and 2025 brings a fresh batch of apps that blend sophisticated sensor use, AI‑driven analysis, and seamless ecosystem integration. Whether you’re an iOS devotee, an Android enthusiast, or someone who switches between platforms, the following roundup highlights the most capable, user‑friendly, and data‑rich sleep apps currently available. Each entry is evaluated on criteria such as sensor utilization, algorithm transparency, cross‑device syncing, privacy safeguards, and overall value.
1. SleepScore™ (iOS & Android)
Why it stands out: SleepScore leverages the phone’s built‑in microphone and accelerometer to capture breathing patterns, movement, and ambient noise. The app’s proprietary “SleepScore™ Algorithm” translates raw data into a 0‑100 sleep quality score, offering a quick snapshot of nightly performance.
Key Features
- Hybrid sensing: Combines audio‑based respiration detection with motion tracking for a more holistic view.
- AI‑driven sleep stage estimation: Uses machine‑learning models trained on clinical polysomnography datasets to infer light, deep, and REM phases.
- Personalized recommendations: Daily “Sleep Insights” suggest adjustments to bedtime, room temperature, and screen usage.
- Smart alarm: Wakes you during the lightest sleep phase within a 30‑minute window, reducing grogginess.
- Integration: Syncs with Apple Health, Google Fit, and major wearables (e.g., Fitbit, Garmin) for consolidated health dashboards.
Pricing & Availability
- Free tier includes basic sleep scoring and smart alarm.
- Premium subscription ($7.99/month or $69/year) unlocks detailed stage breakdowns, historical trends, and advanced coaching modules.
Privacy & Data Handling
- End‑to‑end encryption for all uploaded data.
- Users can opt out of cloud storage; local processing is available for core metrics.
2. Pillow (iOS exclusive)
Why it stands out: Pillow has been a staple for iOS users, and the 2025 update introduces “Pillow Pro AI,” a deep‑learning engine that refines sleep stage detection by cross‑referencing data from the iPhone, Apple Watch, and AirPods Pro (for heart‑rate variability).
Key Features
- Multi‑sensor fusion: Merges accelerometer, microphone, and heart‑rate data for higher accuracy.
- Sleep‑focused audio library: Curated ambient sounds and guided meditations that adapt to your sleep cycle.
- Automatic bedtime detection: Uses calendar events and location data to suggest optimal sleep windows.
- Comprehensive reports: Visual timelines, nightly summaries, and long‑term trend graphs.
- Apple ecosystem integration: Full compatibility with HealthKit, HomeKit (e.g., dimming lights at bedtime), and Shortcuts for automation.
Pricing & Availability
- Free version provides basic sleep tracking and smart alarm.
- Pillow Pro ($9.99/month or $79/year) adds detailed stage analysis, audio recordings, and premium soundscapes.
Privacy & Data Handling
- All processing can be performed on‑device; cloud sync is optional and encrypted.
- Transparent privacy policy with no third‑party advertising.
3. Sleep as Android (Android exclusive)
Why it stands out: A veteran in the Android space, Sleep as Android (SAA) continues to innovate with “SAA AI,” a neural network that refines sleep stage detection using data from the phone’s sensors and optional Bluetooth peripherals (e.g., Oura Ring, Zephyr sleep bands).
Key Features
- Smart alarm with “Sleep Cycle” detection: Chooses the optimal wake‑up moment within a configurable window.
- Snore detection & sound analysis: Identifies snoring patterns and provides actionable tips.
- Sleep debt calculator: Quantifies cumulative sleep deficit and suggests recovery strategies.
- Widget & notification support: Quick glance at sleep score without opening the app.
- Open API: Allows developers to build custom integrations (e.g., with Home Assistant or Tasker).
Pricing & Availability
- Free version includes core tracking, smart alarm, and basic analytics.
- Premium upgrade ($4.99 one‑time or $3.99/month) unlocks advanced statistics, cloud backup, and third‑party device sync.
Privacy & Data Handling
- Local data storage by default; optional encrypted cloud backup via Google Drive.
- No ads in premium version; free tier includes non‑intrusive, privacy‑respecting ads.
4. AutoSleep (iOS & Android)
Why it stands out: AutoSleep distinguishes itself by offering “Passive Tracking” that works even when the phone is placed on a bedside table, thanks to a refined acoustic analysis algorithm that captures breathing and movement without requiring the device to be on the body.
Key Features
- Passive mode: No need to wear a device; the phone’s microphone and accelerometer suffice.
- Heart‑rate monitoring (iOS): When paired with Apple Watch, it adds HRV insights.
- Sleep quality index: Combines duration, efficiency, and restfulness into a single metric.
- Exportable CSV: Enables power users to conduct custom analyses in spreadsheet software.
- Cross‑platform sync: Uses iCloud for iOS and Google Drive for Android to keep data consistent.
Pricing & Availability
- Free trial for 14 days.
- Full version ($5.99 one‑time purchase) unlocks all features across both platforms.
Privacy & Data Handling
- All raw audio is processed locally; no recordings are stored or transmitted.
- Users retain full control over data export and deletion.
5. Calm Sleep (iOS & Android)
Why it stands out: While Calm is best known for meditation, its dedicated “Calm Sleep” module integrates sleep tracking with a vast library of bedtime stories, music, and soundscapes, all curated by sleep scientists.
Key Features
- Story‑driven sleep sessions: Users can select narrated stories that play for up to 2 hours, with built‑in sleep detection to fade out automatically.
- Sleep analytics dashboard: Shows nightly duration, sleep efficiency, and “sleep consistency” score.
- Family sharing: Up to 5 family members can share a single subscription, each with separate sleep profiles.
- Integration with Calm’s mindfulness data: Correlates daytime meditation minutes with sleep quality.
- Smart alarm: Gentle sunrise simulation (via compatible smart lights) aligned with sleep stage detection.
Pricing & Availability
- Included with Calm Premium subscription ($12.99/month or $69.99/year).
- Standalone “Calm Sleep” add‑on ($4.99/month) for users who only need sleep features.
Privacy & Data Handling
- Data encrypted in transit and at rest.
- Option to disable data sharing with third‑party analytics.
6. Beddit (iOS & Android)
Why it stands out: Acquired by Apple, Beddit offers a dedicated hardware sensor strip that plugs under the mattress, but its companion app provides a robust mobile‑only mode for users who prefer a software‑only solution.
Key Features
- Hybrid hardware/software: When the strip is used, the app receives high‑resolution HR, respiration, and temperature data; without hardware, it falls back to motion and sound.
- Temperature tracking: Monitors bedroom temperature and correlates it with sleep efficiency.
- Sleep score breakdown: Detailed percentages for deep, light, and REM sleep.
- Apple Health & Google Fit sync: Seamless data flow into broader health ecosystems.
- Automatic sleep detection: No need to manually start/stop recordings.
Pricing & Availability
- Free app with basic tracking.
- Beddit Premium ($6.99/month) unlocks hardware integration, advanced analytics, and personalized coaching.
Privacy & Data Handling
- End‑to‑end encryption for all sensor data.
- Users can opt out of data sharing with Apple’s research programs.
7. Sleep Cycle (iOS & Android)
Why it stands out: Sleep Cycle’s “Advanced Waveform” mode uses a combination of accelerometer and microphone data to generate a visual waveform of your night, offering a unique perspective on sleep continuity.
Key Features
- Waveform visualization: Shows micro‑movements and breathing patterns in a timeline.
- Sleep notes: Users can tag nights with factors like caffeine intake, stress level, or exercise.
- Trend analysis: Highlights long‑term patterns such as “sleep debt” and “sleep debt recovery.”
- Smart alarm with “Gentle Wake‑Up”: Gradually increases volume and light (via compatible smart bulbs) during the lightest sleep phase.
- Third‑party integrations: Supports IFTTT, allowing custom automations (e.g., turning off Wi‑Fi at bedtime).
Pricing & Availability
- Free tier includes basic tracking and smart alarm.
- Premium subscription ($9.99/month or $59.99/year) adds waveform view, detailed notes, and unlimited data history.
Privacy & Data Handling
- Data stored locally with optional encrypted cloud backup.
- No targeted advertising; premium users enjoy an ad‑free experience.
8. Oura App (iOS & Android) – Mobile Companion
Why it stands out: While Oura is primarily known for its ring, the 2025 Oura App now offers a “Phone‑Only” mode that utilizes the device’s sensors to approximate the ring’s metrics, making it a viable option for users without the hardware.
Key Features
- Ring‑level metrics on phone: Provides estimates of sleep stages, HRV, and body temperature.
- Readiness score: Combines sleep data with activity and recovery metrics to suggest optimal training loads.
- Daily insights: Short, actionable messages based on the previous night’s sleep.
- Seamless handoff: If you later acquire an Oura Ring, data merges without duplication.
- Integration: Syncs with Apple Health, Google Fit, and major fitness platforms (Strava, MyFitnessPal).
Pricing & Availability
- Free for phone‑only mode.
- Oura Membership ($12.99/month) unlocks full ring integration, advanced analytics, and personalized coaching.
Privacy & Data Handling
- Strong emphasis on data ownership; users can export all data in CSV or JSON format.
- All data transmission is encrypted; no data is sold to advertisers.
9. SleepTime (iOS & Android)
Why it stands out: SleepTime focuses on simplicity and visual clarity, offering a “Sleep Map” that highlights periods of high and low sleep quality across the night.
Key Features
- Sleep Map: Color‑coded timeline indicating deep, light, and restless periods.
- Sleep consistency tracker: Measures regularity of bedtime and wake‑time across weeks.
- Ambient sound recorder: Captures background noise levels and provides suggestions for soundproofing.
- Social sharing: Optional feature to share sleep achievements with friends for motivation.
- Widget support: Quick view of last night’s sleep score from the home screen.
Pricing & Availability
- Free with optional in‑app purchases for additional sound packs and premium themes.
- No subscription required for core functionality.
Privacy & Data Handling
- Minimal data collection; only essential usage stats are stored.
- Users can delete all data with a single tap.
10. DreamMapper (iOS & Android)
Why it stands out: DreamMapper integrates sleep tracking with dream journaling, catering to users interested in the qualitative aspects of sleep.
Key Features
- Dream journal: Prompted entries after each night, with tags for emotions, themes, and lucidity.
- Sleep‑dream correlation: Analyzes how sleep stages influence dream recall and vividness.
- AI‑driven suggestions: Recommends bedtime routines to improve dream recall based on past data.
- Exportable reports: Combines quantitative sleep metrics with qualitative dream notes.
- Cross‑platform sync: Data stored in encrypted cloud, accessible from any device.
Pricing & Availability
- Free tier includes basic sleep tracking and limited journal entries.
- Premium upgrade ($5.99/month or $49/year) unlocks unlimited journal entries, AI insights, and export options.
Privacy & Data Handling
- End‑to‑end encryption for journal content.
- Users retain full ownership; no data is used for advertising.
Comparative Overview
| App | Platform(s) | Primary Sensors Used | AI/ML Component | Smart Alarm | Premium Cost (Annual) | Notable Integration |
|---|---|---|---|---|---|---|
| SleepScore™ | iOS, Android | Mic + Accelerometer | Proprietary sleep‑score model | Yes | $69 | Apple Health, Google Fit, Wearables |
| Pillow | iOS | Mic, Accelerometer, Apple Watch HRV | Pillow Pro AI | Yes | $79 | HealthKit, HomeKit, Shortcuts |
| Sleep as Android | Android | Mic + Accelerometer + Bluetooth peripherals | SAA AI | Yes | $3.99/mo | Open API, Tasker |
| AutoSleep | iOS, Android | Mic + Accelerometer (passive) | Refined acoustic analysis | Yes | $5.99 one‑time | iCloud, Google Drive |
| Calm Sleep | iOS, Android | Mic + Accelerometer | Story‑driven sleep detection | Yes (sunrise) | $69 (Calm Premium) | Smart lights, Calm ecosystem |
| Beddit | iOS, Android | Mic + Accelerometer (software) + optional strip | Hybrid hardware/AI | Yes | $69 (Premium) | Apple Health, Google Fit |
| Sleep Cycle | iOS, Android | Mic + Accelerometer | Advanced Waveform AI | Yes | $59.99 | IFTTT, smart bulbs |
| Oura App (Phone‑Only) | iOS, Android | Mic + Accelerometer + optional HR sensors | Ring‑level AI | Yes | $12.99 (Oura Membership) | HealthKit, Google Fit |
| SleepTime | iOS, Android | Mic + Accelerometer | Simple visual mapping | Yes | Free (optional purchases) | Home screen widget |
| DreamMapper | iOS, Android | Mic + Accelerometer | Dream‑sleep correlation AI | Yes | $49 | Cloud sync, export to CSV/JSON |
Choosing the Right App for Your Lifestyle
Even though this article does not delve into the broader “how‑to‑choose” guide, a quick decision matrix can help you align an app with your personal habits:
- Device Ecosystem Preference – If you’re entrenched in Apple’s ecosystem, Pillow and AutoSleep provide the deepest integration. Android power users may gravitate toward Sleep as Android for its open API and customization options.
- Hardware Augmentation – For those willing to invest in a peripheral, Beddit’s strip or Oura’s ring (with the companion app) deliver clinical‑grade data. If you prefer a pure software solution, SleepScore™ and Calm Sleep offer robust analytics without extra hardware.
- Data Privacy Priorities – Apps like AutoSleep and DreamMapper emphasize on‑device processing and end‑to‑end encryption, making them suitable for privacy‑conscious users.
- Feature Focus –
- Smart Alarm & Wake‑Up: SleepScore™, Pillow, Sleep as Android, Sleep Cycle.
- Audio & Ambient Sound: Calm Sleep, Sleep as Android (snore detection).
- Dream Journaling: DreamMapper.
- Family Sharing: Calm Sleep.
- Budget Constraints – Free tiers (Sleep as Android, SleepTime, DreamMapper) provide solid core tracking. Premium subscriptions typically unlock stage‑level detail, historical trends, and personalized coaching.
Future Trends to Watch (Beyond 2025)
While the current landscape is rich, several emerging technologies promise to reshape mobile sleep tracking in the near future:
- Contactless Radar Sensors – Some flagship smartphones are experimenting with ultra‑wideband radar that can detect respiration and heart rate without any physical contact, potentially eliminating the need for microphones.
- Edge‑AI Processing – On‑device neural networks will become more powerful, allowing real‑time sleep stage classification without sending data to the cloud, further enhancing privacy.
- Cross‑Modal Health Insights – Integration of sleep data with mental‑health metrics (e.g., mood tracking, stress hormones) will enable holistic wellness dashboards.
- Standardized Sleep Data Formats – Industry groups are pushing for open standards (e.g., SleepML) that will make it easier to export, compare, and analyze data across apps and research platforms.
- Adaptive Soundscapes – AI‑generated ambient sounds that respond dynamically to detected sleep stage transitions could become a built‑in feature of many apps, offering a more personalized sleep environment.
Final Thoughts
The 2025 edition of smartphone and tablet sleep tracking apps showcases a mature ecosystem where sophisticated sensor fusion, AI‑driven analytics, and seamless health‑platform integration converge. Whether you prefer a minimalist, privacy‑first experience (AutoSleep, SleepTime) or a feature‑rich, coaching‑oriented solution (SleepScore™, Pillow, Calm Sleep), there’s an app tailored to your needs. By selecting an app that aligns with your device preferences, privacy expectations, and lifestyle goals, you can transform nightly data into actionable insights—helping you achieve more restorative sleep and, ultimately, better overall health.
