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Detailed side-by-side comparison of specifications, features and latest prices in India.

Specification	Fastrack Astor FR2 Pro ₹2,799 Prices and availability may change on the seller's site View Price	Realme Watch S2 ₹2,799 Prices and availability may change on the seller's site View Price	Noise ColorFit Pulse 4 Max ₹2,499 Prices and availability may change on the seller's site View Price
General
In The Box	Smart Watch, Magnetic Charging Cable, User Manual, Warranty Card	Smartwatch, Charging Cable, User Manual, Silicone Strap	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card
Model Name	Fastrack Astor FR2 Pro	Realme Watch S2	ColorFit Pulse 4 Max / NSW-421
Launch Date	15/09/2024	30/07/2024	18/07/2024
Colors	Black, Silver, Rose Gold, Grey	Midnight Black, Ocean Silver, Metallic Grey	Jet Black, Deep Wine, Rose Gold, Space Blue, Black Link, Calm Silver Link, Silver Link
Brand	Fastrack	Realme	Noise
Display
Display Size	1.43, 3.63	1.43, 3.63	1.96, 4.98
Resolution	466, 466 pixels	466, 466 pixels	410, 502 pixels
Panel Type	AMOLED	AMOLED with 326 ppi density	AMOLED with 190 ppi
Touch Type	Capacitive Touch	Capacitive multi-touch	Capacitive multi-touch
Always-on Display	—	Yes	Yes
Brightness	Not Specified	600 nits peak brightness	500-600 nits (estimated based on comparable models)
Refresh Rate	Not Specified	60 Hz	Standard AMOLED refresh rate
Color Gamut / HDR Support	—	Full color AMOLED (HDR not specified)	Full color AMOLED display
Screen Protection	Not Specified	7H scratch-resistant glass with Always-On Display support	Curved tempered glass with anti-fingerprint coating
Body
Dimensions	Not Specified	46.5 x 46.5 x 11 mm	46.9 mm dial size
Weight	117 grams	41 grams	39 grams
Case Material	Stainless Steel	Zinc Alloy with electroplating and PVD coating	Metal with metallic finish
Front Protection	Not Specified	7H Scratch-resistant glass	Curved tempered glass with anti-fingerprint coating
Strap / Bracelet Options	Stainless Steel Strap	Silicone (standard, removable) or Stainless Steel optional bands, 22mm width, 150-230mm length	22mm silicone standard; metal mesh/chain and leather straps available separately
Removable / Replaceable Strap	—	Yes	Yes
Water Resistance	IP68	IP68 + 5 ATM (up to 5 meters for 30 minutes)	IP68 - Up to 1.5m depth
Dust Resistance	Yes (IP68)	IP68 dust and water resistant	IP68 certified
Durability Certifications	Not Specified	IP68 certified, Scratch resistant, Temperature range: -40°C to +70°C	IP68 water and dust resistance certification
Primary Controls	Touch Screen, Functional Crown	Crown button on right side + 1 additional button + Capacitive touchscreen	Functional rotating crown, side push button, touch screen
Processor
Operating System	Compatible with Android & iOS	Proprietary RTOS (Real-Time Operating System)	Proprietary Noise OS (compatible with iOS 11.0+ and Android 9.0+)
Chipset / SoC	Not Specified	ATS3085S (Dual-mode Bluetooth processor with MCU + DSP architecture)	Not Specified
CPU Cores & Clock Speed	Not Specified	Dual-core MCU + DSP	Not specified
GPU	Not Specified	Not specified	Not Specified
Health & Fitness Sensors
Heart Rate Monitor	Yes, 24x7 Continuous monitoring	24/7 continuous monitoring with abnormal HR alert	Yes - Optical PPG sensor with continuous and manual detection
ECG	No	No ECG support	No ECG support
SpO₂ / Blood Oxygen	—	24/7 continuous blood oxygen monitoring	Yes - Optical SpO2 sensor
Skin Temperature Sensor	No	No skin temperature sensor	Not available
Sleep Tracking	Yes	24-hour sleep monitoring with sleep stage analysis (light, deep, REM)	Yes - Detailed sleep stages (Light, Deep, REM)
Step Counter	Yes	Yes - pedometer with step count tracking	Yes - Built-in pedometer
GPS	Connected GPS (via smartphone)	No GPS (no built-in or connected GPS)	No built-in GPS - Connected GPS only via smartphone
Accelerometer	Yes	Yes - 3-axis accelerometer	Yes
Gyroscope	Not Specified	Yes - gyroscope sensor	Yes
Barometer	Not Specified	Yes - barometer for altitude tracking	No
Compass	Yes	Yes - compass sensor	No
Other Sensors	Stress Monitor, Calorie Counter	Ambient light sensor, altimeter, stress monitor (HRV-based), menstrual cycle tracker	Calorie burn estimation, activity history, stress measurement, menstrual cycle tracking, VO2 Max
Connectivity
Wi-Fi	No	No Wi-Fi	No Wi-Fi support
Bluetooth	Bluetooth 5.3	Bluetooth 5.3 with 10-meter connectivity range	Bluetooth 5.3
NFC	No	No	No
Cellular Connectivity	No (Bluetooth calling only)	Bluetooth only (no cellular, Wi-Fi, or satellite)	Wi-Fi Only (via smartphone)
ANT+	No	No	No
Battery
Capacity	Approximately 280-300 mAh	380 mAh Li-ion non-removable	300 mAh
Fast Charging Support	Yes	Yes - approximately 60 minutes for full charge	No fast charging support
Estimated Runtime	Up to 5 days	14 days typical use, 20 days with custom battery mode, 5 days with Always-On Display, 38 days standby	Up to 7 days typical use, 30 days standby
Charging Method	Magnetic charging cable	Magnetic dock/wired connector	Magnetic 2-pin connector
Battery Saver Modes	Yes, multiple power saving modes available	Customizable ultra-long battery mode, AI-optimized battery mode, time-only mode	Yes - Screen brightness reduction and selective heart rate monitoring
Memory & Storage
RAM	128 MB	8 MB PSRAM	Not specified
Internal Storage	Not specified	4 GB Flash (500 MB user-accessible for music)	Not specified
Expandable Storage	No	No microSD card slot	No expandable storage
Design & Comfort
Bezel Type	Fixed bezel	Fixed circular bezel with watch-inspired design	Fixed bezel with metallic finish
Buttons / Crown	Functional Crown (rotatable) + Side button	1 rotating crown button on right side + 1 additional action button	Functional mechanical crown + side push button
Vibration Motor	Yes	Yes - haptic vibration motor	Yes - Haptic feedback vibration alerts
Screen Glass Type	Not Specified	7H scratch-resistant mineral glass	Curved tempered glass
Health & Safety Features
Fall Detection / SOS Calling	SOS Calling Available	No fall detection or emergency SOS calling	Yes - SOS technology with emergency calling
Menstrual Cycle / Health Tracking	Not Specified	Yes - menstrual cycle tracking with prediction and period reminder	Yes - Female health cycle tracker
Noise Monitoring	Not Specified	Ambient volume monitoring (no formal noise exposure detection)	No
Guided Breathing / Mindfulness Features	Stress Tracking Available	Yes - guided breathing exercises and mindfulness reminders via Realme Link app	Yes - Guided breathing practice feature
Audio & Voice
Built-in Speaker	Yes	Yes - up to 90 dB speaker with 10-meter microphone pickup in quiet environments	Yes
Microphone	Yes	Yes - high-performance microphone for Bluetooth calling	Yes - Dual microphone setup
Voice Assistant	AI Voice Assistant	Yes - ChatGPT 3.5 powered AI assistant with voice-controlled watch face generation	Yes - AI Voice Assistant with AI Search feature
Bluetooth Audio Output	Yes	Yes - supports Bluetooth audio playback and streaming	Yes - Bluetooth audio output for music control
Notifications & Controls
Notification Support	Yes (all smartphone notifications)	Call alerts, SMS/messaging alerts, app notifications, rich notifications	Call alerts, SMS/messaging alerts, social media app notifications
Quick Reply Options	Limited functionality (depends on phone OS)	Predefined messages only (no voice or custom text reply on watch)	Call rejection available (no voice/text reply)
Music Control / Playback	Yes	Play/Pause, Next/Previous track, Volume control, Local MP3 storage playback	Yes - Play/Pause, Next/Previous Track, Volume Control
Find My Phone	Yes	Yes - Find My Phone feature via Realme Link app	Yes - Find My Phone feature
Remote Camera Shutter	Yes (camera control)	Yes - remote camera shutter control	Yes - Remote camera control from watch
Security
Fingerprint Sensor	No	No	No
Face Unlock	No	No	No
NFC Payment Security	No (no NFC payment support)	No NFC payment capability	No NFC support - no contactless payments
Find My Watch	Yes (via companion app)	Not officially specified	Not confirmed in specifications
Ports & Accessories
Charging Connector Type	Magnetic charging pins	Proprietary magnetic dock connector	Magnetic 2-pin proprietary connector
Optional Docks / Stands	None available	N/A	Magnetic charging dock available separately
Bundled Extras	Multiple strap color options available separately	Smartwatch, Charging Cable, User Manual, Silicone Strap; Extra straps available in multiple colors (sold separately)	User manual, warranty card, charging cable
Software & Apps
App Store Availability	No dedicated app store	Realme Link app - available on Google Play Store and Apple App Store	NoiseFit App on Google Play Store and Apple App Store
Customization Options	100+ watch faces, customizable widgets	150+ cloud-based watch faces, AI-generated custom watch faces via voice commands, 110+ pre-loaded sports modes (expandable to 130+), customizable tiles and quick access shortcuts	100+ cloud-based watch faces + AI Create feature for unlimited AI-powered custom watch face generation
Companion App	Fastrack Smart World App (Android & iOS)	Realme Link (Android & iOS compatible)	NoiseFit App (iOS 11.0+ / Android 9.0+)
OTA Updates	Yes (via companion app)	Yes - Over-the-Air updates supported	Yes - OTA updates supported
Pre-installed Apps	100+ sports modes, health tracking, built-in games, calculator	ChatGPT 3.5 assistant, 110+ sports modes with auto-recognition, 150+ watch face library, health monitoring apps (HR, SpO2, sleep, stress tracking), Realme Link companion app	NoiseFit Health Suite, AI voice assistant, activity tracking, weather app, calculator, stopwatch, timer, alarm, reminder, music control