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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	Fire-Boltt Axiom ₹2,699 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	Realme Watch S2 ₹2,799 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, Wireless Charging Dock, User Manual, Warranty Card	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card	Smartwatch, Charging Cable, User Manual, Silicone Strap
Model Name	Fastrack Astor FR2 Pro	Fire-Boltt Axiom	ColorFit Pulse 4 Max / NSW-421	Realme Watch S2
Launch Date	15/09/2024	15/09/2025	18/07/2024	30/07/2024
Colors	Black, Silver, Rose Gold, Grey	Black, Silver, Orange, Gold	Jet Black, Deep Wine, Rose Gold, Space Blue, Black Link, Calm Silver Link, Silver Link	Midnight Black, Ocean Silver, Metallic Grey
Brand	Fastrack	FireBoltt	Noise	Realme
Display
Display Size	1.43, 3.63	1.43, 3.63	1.96, 4.98	1.43, 3.63
Resolution	466, 466 pixels	466, 466 pixels	410, 502 pixels	466, 466 pixels
Panel Type	AMOLED	AMOLED	AMOLED with 190 ppi	AMOLED with 326 ppi density
Touch Type	Capacitive Touch	Full Capacitive Touch	Capacitive multi-touch	Capacitive multi-touch
Always-on Display	—	Yes	Yes	Yes
Brightness	Not Specified	1000 nits (Peak)	500-600 nits (estimated based on comparable models)	600 nits peak brightness
Refresh Rate	Not Specified	60Hz	Standard AMOLED refresh rate	60 Hz
Color Gamut / HDR Support	—	Not Specified	Full color AMOLED display	Full color AMOLED (HDR not specified)
Screen Protection	Not Specified	Flat Curved Glass	Curved tempered glass with anti-fingerprint coating	7H scratch-resistant glass with Always-On Display support
Body
Dimensions	Not Specified	Standard 46mm dial size	46.9 mm dial size	46.5 x 46.5 x 11 mm
Weight	117 grams	60 g	39 grams	41 grams
Case Material	Stainless Steel	Stainless Steel / Metal Alloy	Metal with metallic finish	Zinc Alloy with electroplating and PVD coating
Front Protection	Not Specified	Curved Glass	Curved tempered glass with anti-fingerprint coating	7H Scratch-resistant glass
Strap / Bracelet Options	Stainless Steel Strap	Silicone, Stainless Steel (variant dependent)	22mm silicone standard; metal mesh/chain and leather straps available separately	Silicone (standard, removable) or Stainless Steel optional bands, 22mm width, 150-230mm length
Removable / Replaceable Strap	—	Yes	Yes	Yes
Water Resistance	IP68	IP68 Water Resistant	IP68 - Up to 1.5m depth	IP68 + 5 ATM (up to 5 meters for 30 minutes)
Dust Resistance	Yes (IP68)	IP68 Dust Resistant	IP68 certified	IP68 dust and water resistant
Durability Certifications	Not Specified	Not Specified	IP68 water and dust resistance certification	IP68 certified, Scratch resistant, Temperature range: -40°C to +70°C
Primary Controls	Touch Screen, Functional Crown	Rotating Crown, Touch Screen, Push Button	Functional rotating crown, side push button, touch screen	Crown button on right side + 1 additional button + Capacitive touchscreen
Processor
Operating System	Compatible with Android & iOS	Proprietary RTOS	Proprietary Noise OS (compatible with iOS 11.0+ and Android 9.0+)	Proprietary RTOS (Real-Time Operating System)
Chipset / SoC	Not Specified	Single Core Digital Chipset	Not Specified	ATS3085S (Dual-mode Bluetooth processor with MCU + DSP architecture)
CPU Cores & Clock Speed	Not Specified	Single Core	Not specified	Dual-core MCU + DSP
GPU	Not Specified	Integrated	Not Specified	Not specified
Health & Fitness Sensors
Heart Rate Monitor	Yes, 24x7 Continuous monitoring	Optical PPG Sensor	Yes - Optical PPG sensor with continuous and manual detection	24/7 continuous monitoring with abnormal HR alert
ECG	No	No	No ECG support	No ECG support
SpO₂ / Blood Oxygen	—	Yes	Yes - Optical SpO2 sensor	24/7 continuous blood oxygen monitoring
Skin Temperature Sensor	No	No	Not available	No skin temperature sensor
Sleep Tracking	Yes	Yes (Light, Deep, REM)	Yes - Detailed sleep stages (Light, Deep, REM)	24-hour sleep monitoring with sleep stage analysis (light, deep, REM)
Step Counter	Yes	Yes	Yes - Built-in pedometer	Yes - pedometer with step count tracking
GPS	Connected GPS (via smartphone)	No (Connected GPS only)	No built-in GPS - Connected GPS only via smartphone	No GPS (no built-in or connected GPS)
Accelerometer	Yes	Yes	Yes	Yes - 3-axis accelerometer
Gyroscope	Not Specified	Not Specified	Yes	Yes - gyroscope sensor
Barometer	Not Specified	No	No	Yes - barometer for altitude tracking
Compass	Yes	No	No	Yes - compass sensor
Other Sensors	Stress Monitor, Calorie Counter	Sedentary Reminder, Hydration Reminder	Calorie burn estimation, activity history, stress measurement, menstrual cycle tracking, VO2 Max	Ambient light sensor, altimeter, stress monitor (HRV-based), menstrual cycle tracker
Connectivity
Wi-Fi	No	No	No Wi-Fi support	No Wi-Fi
Bluetooth	Bluetooth 5.3	Bluetooth 5.0	Bluetooth 5.3	Bluetooth 5.3 with 10-meter connectivity range
NFC	No	No	No	No
Cellular Connectivity	No (Bluetooth calling only)	No	Wi-Fi Only (via smartphone)	Bluetooth only (no cellular, Wi-Fi, or satellite)
ANT+	No	No	No	No
Battery
Capacity	Approximately 280-300 mAh	300 mAh	300 mAh	380 mAh Li-ion non-removable
Fast Charging Support	Yes	No	No fast charging support	Yes - approximately 60 minutes for full charge
Estimated Runtime	Up to 5 days	Up to 7 Days (Typical)	Up to 7 days typical use, 30 days standby	14 days typical use, 20 days with custom battery mode, 5 days with Always-On Display, 38 days standby
Charging Method	Magnetic charging cable	Wireless Magnetic Dock	Magnetic 2-pin connector	Magnetic dock/wired connector
Battery Saver Modes	Yes, multiple power saving modes available	Power Saver Mode	Yes - Screen brightness reduction and selective heart rate monitoring	Customizable ultra-long battery mode, AI-optimized battery mode, time-only mode
Memory & Storage
RAM	128 MB	System RAM only	Not specified	8 MB PSRAM
Internal Storage	Not specified	No user accessible storage	Not specified	4 GB Flash (500 MB user-accessible for music)
Expandable Storage	No	No	No expandable storage	No microSD card slot
Design & Comfort
Bezel Type	Fixed bezel	Fixed with Rotating Crown	Fixed bezel with metallic finish	Fixed circular bezel with watch-inspired design
Buttons / Crown	Functional Crown (rotatable) + Side button	1 Rotating Crown, 1 Push Button	Functional mechanical crown + side push button	1 rotating crown button on right side + 1 additional action button
Vibration Motor	Yes	Yes	Yes - Haptic feedback vibration alerts	Yes - haptic vibration motor
Screen Glass Type	Not Specified	Glass	Curved tempered glass	7H scratch-resistant mineral glass
Health & Safety Features
Fall Detection / SOS Calling	SOS Calling Available	No	Yes - SOS technology with emergency calling	No fall detection or emergency SOS calling
Menstrual Cycle / Health Tracking	Not Specified	Yes (Female Health Tracking)	Yes - Female health cycle tracker	Yes - menstrual cycle tracking with prediction and period reminder
Noise Monitoring	Not Specified	No	No	Ambient volume monitoring (no formal noise exposure detection)
Guided Breathing / Mindfulness Features	Stress Tracking Available	Breathing Exercises	Yes - Guided breathing practice feature	Yes - guided breathing exercises and mindfulness reminders via Realme Link app
Audio & Voice
Built-in Speaker	Yes	Yes	Yes	Yes - up to 90 dB speaker with 10-meter microphone pickup in quiet environments
Microphone	Yes	Yes	Yes - Dual microphone setup	Yes - high-performance microphone for Bluetooth calling
Voice Assistant	AI Voice Assistant	AI Voice Assistant (Siri/Google via Phone)	Yes - AI Voice Assistant with AI Search feature	Yes - ChatGPT 3.5 powered AI assistant with voice-controlled watch face generation
Bluetooth Audio Output	Yes	Phone Calls Only	Yes - Bluetooth audio output for music control	Yes - supports Bluetooth audio playback and streaming
Notifications & Controls
Notification Support	Yes (all smartphone notifications)	Call, SMS, WhatsApp, Social Media	Call alerts, SMS/messaging alerts, social media app notifications	Call alerts, SMS/messaging alerts, app notifications, rich notifications
Quick Reply Options	Limited functionality (depends on phone OS)	No	Call rejection available (no voice/text reply)	Predefined messages only (no voice or custom text reply on watch)
Music Control / Playback	Yes	Music Control (Remote)	Yes - Play/Pause, Next/Previous Track, Volume Control	Play/Pause, Next/Previous track, Volume control, Local MP3 storage playback
Find My Phone	Yes	Yes	Yes - Find My Phone feature	Yes - Find My Phone feature via Realme Link app
Remote Camera Shutter	Yes (camera control)	Yes	Yes - Remote camera control from watch	Yes - remote camera shutter control
Security
Fingerprint Sensor	No	No	No	No
Face Unlock	No	No	No	No
NFC Payment Security	No (no NFC payment support)	No	No NFC support - no contactless payments	No NFC payment capability
Find My Watch	Yes (via companion app)	Yes (via App)	Not confirmed in specifications	Not officially specified
Ports & Accessories
Charging Connector Type	Magnetic charging pins	Wireless Charging Dock	Magnetic 2-pin proprietary connector	Proprietary magnetic dock connector
Optional Docks / Stands	None available	None	Magnetic charging dock available separately	N/A
Bundled Extras	Multiple strap color options available separately	Charging Cable, Manual	User manual, warranty card, charging cable	Smartwatch, Charging Cable, User Manual, Silicone Strap; Extra straps available in multiple colors (sold separately)
Software & Apps
App Store Availability	No dedicated app store	No	NoiseFit App on Google Play Store and Apple App Store	Realme Link app - available on Google Play Store and Apple App Store
Customization Options	100+ watch faces, customizable widgets	100+ Cloud Watch Faces	100+ cloud-based watch faces + AI Create feature for unlimited AI-powered custom watch face generation	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
Companion App	Fastrack Smart World App (Android & iOS)	Fire-Boltt App / Da Fit	NoiseFit App (iOS 11.0+ / Android 9.0+)	Realme Link (Android & iOS compatible)
OTA Updates	Yes (via companion app)	Yes	Yes - OTA updates supported	Yes - Over-the-Air updates supported
Pre-installed Apps	100+ sports modes, health tracking, built-in games, calculator	Alarm, Stopwatch, Timer, Weather, Calculator, Games	NoiseFit Health Suite, AI voice assistant, activity tracking, weather app, calculator, stopwatch, timer, alarm, reminder, music control	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