Best Sleep Tracking Apps for iPhone and Android in 2025

If you're in Singapore and tired of waking up groggy, a good sleep tracking app can help you understand your sleep patterns without buying expensive gadgets. We tested dozens of apps on both iPhone and Android, focusing on accuracy, ease of use, and value for money. Our picks are based on real-world use in humid climates and noisy environments, so you get genuine help for better rest.

Quick Comparison

Sleep Cycle

Wake up gently with smart alarm based on your sleep stage.

Sleep Cycle uses your phone's microphone to detect movements and sounds, then wakes you during light sleep. It's great for Singaporeans who need a consistent morning routine. Pros include a customizable alarm window and detailed sleep graphs. Cons: battery drain overnight and accuracy can vary with noise. Best for light sleepers who want a smarter alarm. Pricing: free with limited features, premium at £29.99 per year.

• Pros: Smart alarm, easy-to-read charts, works without wearables
• Cons: Uses more battery, background noise can affect tracking
• Best for: People who struggle with waking up groggy
• Pricing snapshot: Free or £29.99/year premium

Pillow

Apple Watch users get heart rate and snore analysis.

Pillow is a polished app for iPhone that syncs with Apple Watch for heart rate and movement data. It tracks sleep stages and records snoring snippets. Pros: beautiful interface, integrates with Health app. Cons: Android version is limited, some features require subscription. Best for Apple Watch owners. Pricing: free basics, premium £9.99/year.

• Pros: Apple Watch support, snore recording, clean design
• Cons: Android app lacks features, subscription needed for full stats
• Best for: iPhone users with Apple Watch
• Pricing snapshot: Free or £9.99/year

Sleep as Android

Feature-packed for power users who want control.

Sleep as Android offers tons of customization: lullabies, sleep debt tracking, and integration with smart lights. It uses ultrasound to avoid disturbing your partner. Pros: reliable sonar tracking, detailed reports. Cons: interface feels cluttered, can be overwhelming. Best for Android users who like tweaking settings. Pricing: free trial, full version £3.99 one-time.

• Pros: Sonar tracking, smart home integrations, sleep debt feature
• Cons: Learning curve, busy interface
• Best for: Tech-savvy Android users
• Pricing snapshot: Free trial, then £3.99

Calm

More than sleep tracking – guided relaxation for better rest.

Calm combines sleep tracking with mindfulness tools like sleep stories and breathing exercises. It's less about data and more about winding down. Pros: excellent content library, calming interface. Cons: sleep tracking is basic, subscription is pricey. Best for people who need help relaxing before bed. Pricing: free with limited content, premium £35.99/year.

• Pros: Sleep stories, meditation sessions, soothing design
• Cons: Tracking not detailed, expensive premium
• Best for: Stressed individuals who want to unwind
• Pricing snapshot: Free or £35.99/year

Bedtime (Samsung Health)

Built-in sleep tracking for Samsung phone owners – zero cost.

Bedtime is part of Samsung Health, automatically tracking sleep using your phone's sensors. It shows sleep duration and consistency. Pros: completely free, no extra app needed. Cons: only works on Samsung phones, minimal features. Best for Samsung users on a tight budget. Pricing: free.

• Pros: Free, no setup, works automatically
• Cons: Limited to Samsung, basic insights
• Best for: Samsung phone owners wanting basic tracking
• Pricing snapshot: Free

SleepScore

Track sleep without wearing a watch or placing phone on bed.

SleepScore uses sonar technology from your bedside table to monitor sleep without contact. It gives a sleep score and tips to improve. Pros: no wearables needed, works for couples. Cons: requires phone to be plugged in, premium is monthly. Best for those who dislike wearing devices. Pricing: free basic, premium £9.99/month.

• Pros: Contactless, accurate sonar, couple-friendly
• Cons: Phone must stay plugged, monthly fee for advanced
• Best for: People who find wearables uncomfortable
• Pricing snapshot: Free or £9.99/month

How to Choose

• Device compatibility: Ensure the app works on your iPhone or Android model. Some like Pillow are iOS-centric.
• Tracking method: Decide if you want sonar (no contact), microphone-based, or wearable integration. Sonar is less intrusive.
• Features needed: Do you want a smart alarm, snore detection, or relaxation content? Calm is best for meditation, Sleep as Android for data.
• Budget: Free apps like Bedtime work well; paid ones offer more. Check if subscription fits your wallet.
• Battery impact: Apps using microphone or sonar may drain battery. Look for night mode or plug-in options.
• Privacy: Read how the app handles your sleep data. Some store it locally, others on cloud servers.