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

Specification	Noise ColorFit Pulse 4 Max ₹2,499 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	Boult Crown R Pro ₹1,999 Prices and availability may change on the seller's site View Price	Fastrack Astor FR2 Pro ₹2,799 Prices and availability may change on the seller's site View Price	boAt Lunar Atlas,GPS Tracking,1.39″ Display,Rugged Body,Functional Crown Smartwatch ₹1,899 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	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card	Smartwatch, Wireless Charging Dock, User Manual, Warranty Card	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card	Smart Watch, Magnetic Charging Cable, User Manual, Warranty Card	1 Unit Smartwatch, 1 Unit USB Magnetic Charging Cable, 1 Unit User Manual, 1 Unit Warranty Card	Smartwatch, Charging Cable, User Manual, Silicone Strap
Model Name	ColorFit Pulse 4 Max / NSW-421	Fire-Boltt Axiom	Crown R Pro	Fastrack Astor FR2 Pro	boAt Lunar Atlas	Realme Watch S2
Launch Date	18/07/2024	15/09/2025	18/06/2023	15/09/2024	06/02/2026	30/07/2024
Colors	Jet Black, Deep Wine, Rose Gold, Space Blue, Black Link, Calm Silver Link, Silver Link	Black, Silver, Orange, Gold	Frozen Silver, Thunder Black, Volcanic Orange	Black, Silver, Rose Gold, Grey	Ranger Black, Phantom Blue	Midnight Black, Ocean Silver, Metallic Grey
Brand	Noise	FireBoltt	GoBoult	Fastrack	BoAt	Realme
Display
Display Size	1.96, 4.98	1.43, 3.63	1.43, 3.63	1.43, 3.63	1.39, 3.5	1.43, 3.63
Resolution	410, 502 pixels	466, 466 pixels	466, 466 pixels	466, 466 pixels	240, 240 pixels	466, 466 pixels
Panel Type	AMOLED with 190 ppi	AMOLED	Super AMOLED	AMOLED	Color HD Display (TFT-LCD)	AMOLED with 326 ppi density
Touch Type	Capacitive multi-touch	Full Capacitive Touch	Full Touch	Capacitive Touch	Full Capacitive Touch	Capacitive multi-touch
Always-on Display	Yes	Yes	Yes	—	No	Yes
Brightness	500-600 nits (estimated based on comparable models)	1000 nits (Peak)	600 nits	Not Specified	500 nits	600 nits peak brightness
Refresh Rate	Standard AMOLED refresh rate	60Hz	60 Hz	Not Specified	60 Hz	60 Hz
Color Gamut / HDR Support	Full color AMOLED display	Not Specified	Not Specified	—	Standard	Full color AMOLED (HDR not specified)
Screen Protection	Curved tempered glass with anti-fingerprint coating	Flat Curved Glass	2.5D Curved Glass	Not Specified	Flat Toughened Glass	7H scratch-resistant glass with Always-On Display support
Body
Dimensions	46.9 mm dial size	Standard 46mm dial size	46 x 46 x 11 mm (Approx)	Not Specified	264.9 x 48.6 x 12.9 mm	46.5 x 46.5 x 11 mm
Weight	39 grams	60 g	56.5 g	117 grams	Not Specified	41 grams
Case Material	Metal with metallic finish	Stainless Steel / Metal Alloy	Zinc Alloy Frame	Stainless Steel	Rugged Metallic Alloy Middle Frame with Plastic Bottom	Zinc Alloy with electroplating and PVD coating
Front Protection	Curved tempered glass with anti-fingerprint coating	Curved Glass	Glass	Not Specified	Toughened Flat Glass	7H Scratch-resistant glass
Strap / Bracelet Options	22mm silicone standard; metal mesh/chain and leather straps available separately	Silicone, Stainless Steel (variant dependent)	Silicone, Metallic (variant dependent)	Stainless Steel Strap	22mm Silicone Strap	Silicone (standard, removable) or Stainless Steel optional bands, 22mm width, 150-230mm length
Removable / Replaceable Strap	Yes	Yes	Yes	—	Yes	Yes
Water Resistance	IP68 - Up to 1.5m depth	IP68 Water Resistant	IP67 Water Resistant	IP68	IP68 water resistant up to 1.5m for 10 minutes	IP68 + 5 ATM (up to 5 meters for 30 minutes)
Dust Resistance	IP68 certified	IP68 Dust Resistant	IP67 Dust Resistant	Yes (IP68)	Dust proof	IP68 dust and water resistant
Durability Certifications	IP68 water and dust resistance certification	Not Specified	None	Not Specified	IP68 Certified	IP68 certified, Scratch resistant, Temperature range: -40°C to +70°C
Primary Controls	Functional rotating crown, side push button, touch screen	Rotating Crown, Touch Screen, Push Button	Touch Screen, Functional Crown, Push Button	Touch Screen, Functional Crown	Touch Screen, Functional Rotating Crown, Side Buttons	Crown button on right side + 1 additional button + Capacitive touchscreen
Processor
Operating System	Proprietary Noise OS (compatible with iOS 11.0+ and Android 9.0+)	Proprietary RTOS	Boult OS (RTOS)	Compatible with Android & iOS	Proprietary RTOS	Proprietary RTOS (Real-Time Operating System)
Chipset / SoC	Not Specified	Single Core Digital Chipset	Single-chip 2-in-1 Bluetooth SoC	Not Specified	Not Specified	ATS3085S (Dual-mode Bluetooth processor with MCU + DSP architecture)
CPU Cores & Clock Speed	Not specified	Single Core	Not Specified	Not Specified	Not Specified (Optimized for low power)	Dual-core MCU + DSP
GPU	Not Specified	Integrated	Not Specified	Not Specified	—	Not specified
Health & Fitness Sensors
Heart Rate Monitor	Yes - Optical PPG sensor with continuous and manual detection	Optical PPG Sensor	24/7 Heart Rate Monitor	Yes, 24x7 Continuous monitoring	Continuous Optical Heart Rate Monitoring	24/7 continuous monitoring with abnormal HR alert
ECG	No ECG support	No	No	No	Not Available	No ECG support
SpO₂ / Blood Oxygen	Yes - Optical SpO2 sensor	Yes	SpO2 Sensor	—	SpO2 Blood Oxygen Monitoring	24/7 continuous blood oxygen monitoring
Skin Temperature Sensor	Not available	No	No	No	Not Available	No skin temperature sensor
Sleep Tracking	Yes - Detailed sleep stages (Light, Deep, REM)	Yes (Light, Deep, REM)	Sleep Monitor (Light, Deep, REM)	Yes	Sleep Stage Tracking (Light, Deep, REM)	24-hour sleep monitoring with sleep stage analysis (light, deep, REM)
Step Counter	Yes - Built-in pedometer	Yes	Yes	Yes	Integrated Pedometer	Yes - pedometer with step count tracking
GPS	No built-in GPS - Connected GPS only via smartphone	No (Connected GPS only)	Connected GPS	Connected GPS (via smartphone)	App-Powered GPS Tracking (Connected via Phone)	No GPS (no built-in or connected GPS)
Accelerometer	Yes	Yes	Yes	Yes	Tri-axial Accelerometer	Yes - 3-axis accelerometer
Gyroscope	Yes	Not Specified	Not Specified	Not Specified	Not Available	Yes - gyroscope sensor
Barometer	No	No	No	Not Specified	Not Available	Yes - barometer for altitude tracking
Compass	No	No	No	Yes	Not Available	Yes - compass sensor
Other Sensors	Calorie burn estimation, activity history, stress measurement, menstrual cycle tracking, VO2 Max	Sedentary Reminder, Hydration Reminder	Blood Pressure (Simulated), Menstrual Cycle Tracker, Breath Training	Stress Monitor, Calorie Counter	Stress Monitoring, Female Cycle Tracking	Ambient light sensor, altimeter, stress monitor (HRV-based), menstrual cycle tracker
Connectivity
Wi-Fi	No Wi-Fi support	No	No	No	No Wi-Fi support	No Wi-Fi
Bluetooth	Bluetooth 5.3	Bluetooth 5.0	Bluetooth 5.2	Bluetooth 5.3	Bluetooth version 5.4	Bluetooth 5.3 with 10-meter connectivity range
NFC	No	No	No	No	No	No
Cellular Connectivity	Wi-Fi Only (via smartphone)	No	No	No (Bluetooth calling only)	None	Bluetooth only (no cellular, Wi-Fi, or satellite)
ANT+	No	No	No	No	No	No
Battery
Capacity	300 mAh	300 mAh	Not Specified (Approx 250-300mAh)	Approximately 280-300 mAh	410 mAh	380 mAh Li-ion non-removable
Fast Charging Support	No fast charging support	No	No	Yes	Full charge in approximately 50 minutes	Yes - approximately 60 minutes for full charge
Estimated Runtime	Up to 7 days typical use, 30 days standby	Up to 7 Days (Typical)	Up to 5 Days (Typical)	Up to 5 days	7-10 days typical; 2-3 days calling	14 days typical use, 20 days with custom battery mode, 5 days with Always-On Display, 38 days standby
Charging Method	Magnetic 2-pin connector	Wireless Magnetic Dock	Magnetic Charging	Magnetic charging cable	USB Magnetic 2-pin Pogo Cable	Magnetic dock/wired connector
Battery Saver Modes	Yes - Screen brightness reduction and selective heart rate monitoring	Power Saver Mode	Yes	Yes, multiple power saving modes available	Automatic trigger at 10% battery	Customizable ultra-long battery mode, AI-optimized battery mode, time-only mode
Memory & Storage
RAM	Not specified	System RAM only	Not Specified	128 MB	Not Specified	8 MB PSRAM
Internal Storage	Not specified	No user accessible storage	Not Specified	Not specified	Flash memory for health data and contacts	4 GB Flash (500 MB user-accessible for music)
Expandable Storage	No expandable storage	No	No	No	No	No microSD card slot
Design & Comfort
Bezel Type	Fixed bezel with metallic finish	Fixed with Rotating Crown	Fixed	Fixed bezel	Fixed Rugged Bezel	Fixed circular bezel with watch-inspired design
Buttons / Crown	Functional mechanical crown + side push button	1 Rotating Crown, 1 Push Button	Rotating Crown + 1 Button	Functional Crown (rotatable) + Side button	Functional Rotating Crown and 2 Physical Buttons	1 rotating crown button on right side + 1 additional action button
Vibration Motor	Yes - Haptic feedback vibration alerts	Yes	Yes	Yes	Haptic Vibration Motor	Yes - haptic vibration motor
Screen Glass Type	Curved tempered glass	Glass	2.5D Glass	Not Specified	Flat Toughened Glass	7H scratch-resistant mineral glass
Health & Safety Features
Fall Detection / SOS Calling	Yes - SOS technology with emergency calling	No	No	SOS Calling Available	SOS emergency calling via phone	No fall detection or emergency SOS calling
Menstrual Cycle / Health Tracking	Yes - Female health cycle tracker	Yes (Female Health Tracking)	Female Health Tracker	Not Specified	Female Wellness Tracking via App	Yes - menstrual cycle tracking with prediction and period reminder
Noise Monitoring	No	No	No	Not Specified	Not Available	Ambient volume monitoring (no formal noise exposure detection)
Guided Breathing / Mindfulness Features	Yes - Guided breathing practice feature	Breathing Exercises	Breath Training	Stress Tracking Available	Guided Breathing / Relax Mode	Yes - guided breathing exercises and mindfulness reminders via Realme Link app
Audio & Voice
Built-in Speaker	Yes	Yes	Yes	Yes	Built-in speaker for Bluetooth calls	Yes - up to 90 dB speaker with 10-meter microphone pickup in quiet environments
Microphone	Yes - Dual microphone setup	Yes	Yes	Yes	Built-in microphone with ENx Noise Suppression	Yes - high-performance microphone for Bluetooth calling
Voice Assistant	Yes - AI Voice Assistant with AI Search feature	AI Voice Assistant (Siri/Google via Phone)	Yes (AI Voice Assistant)	AI Voice Assistant	Siri and Google Assistant supported	Yes - ChatGPT 3.5 powered AI assistant with voice-controlled watch face generation
Bluetooth Audio Output	Yes - Bluetooth audio output for music control	Phone Calls Only	No	Yes	Audio via watch speaker	Yes - supports Bluetooth audio playback and streaming
Notifications & Controls
Notification Support	Call alerts, SMS/messaging alerts, social media app notifications	Call, SMS, WhatsApp, Social Media	Call, SMS, App Notifications	Yes (all smartphone notifications)	Alerts for calls, SMS, and app notifications	Call alerts, SMS/messaging alerts, app notifications, rich notifications
Quick Reply Options	Call rejection available (no voice/text reply)	No	No	Limited functionality (depends on phone OS)	Predefined quick reply for calls (Android only)	Predefined messages only (no voice or custom text reply on watch)
Music Control / Playback	Yes - Play/Pause, Next/Previous Track, Volume Control	Music Control (Remote)	Music Control (Phone)	Yes	Remote music control for phone	Play/Pause, Next/Previous track, Volume control, Local MP3 storage playback
Find My Phone	Yes - Find My Phone feature	Yes	Yes	Yes	Available via Bluetooth	Yes - Find My Phone feature via Realme Link app
Remote Camera Shutter	Yes - Remote camera control from watch	Yes	Yes	Yes (camera control)	Remote shutter control for phone	Yes - remote camera shutter control
Security
Fingerprint Sensor	No	No	No	No	No	No
Face Unlock	No	No	No	No	No	No
NFC Payment Security	No NFC support - no contactless payments	No	No	No (no NFC payment support)	Not Available	No NFC payment capability
Find My Watch	Not confirmed in specifications	Yes (via App)	Yes (via App)	Yes (via companion app)	Available via boAt Crest App	Not officially specified
Ports & Accessories
Charging Connector Type	Magnetic 2-pin proprietary connector	Wireless Charging Dock	Magnetic Pogo Pin	Magnetic charging pins	Magnetic Pogo Pin	Proprietary magnetic dock connector
Optional Docks / Stands	Magnetic charging dock available separately	None	None	None available	Not Available	N/A
Bundled Extras	User manual, warranty card, charging cable	Charging Cable, Manual	Charging Cable, User Manual	Multiple strap color options available separately	1 Magnetic Charging Cable	Smartwatch, Charging Cable, User Manual, Silicone Strap; Extra straps available in multiple colors (sold separately)
Software & Apps
App Store Availability	NoiseFit App on Google Play Store and Apple App Store	No	None	No dedicated app store	No standalone app store	Realme Link app - available on Google Play Store and Apple App Store
Customization Options	100+ cloud-based watch faces + AI Create feature for unlimited AI-powered custom watch face generation	100+ Cloud Watch Faces	150+ Watch Faces, Menu Styles	100+ watch faces, customizable widgets	100+ Cloud Watch Faces, Customizable Watch Face Studio	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	NoiseFit App (iOS 11.0+ / Android 9.0+)	Fire-Boltt App / Da Fit	Boult Fit (GoBoult Fit)	Fastrack Smart World App (Android & iOS)	boAt Crest App	Realme Link (Android & iOS compatible)
OTA Updates	Yes - OTA updates supported	Yes	Yes	Yes (via companion app)	Firmware updates via App	Yes - Over-the-Air updates supported
Pre-installed Apps	NoiseFit Health Suite, AI voice assistant, activity tracking, weather app, calculator, stopwatch, timer, alarm, reminder, music control	Alarm, Stopwatch, Timer, Weather, Calculator, Games	Alarm, Stopwatch, Weather, Calculator, Games	100+ sports modes, health tracking, built-in games, calculator	100+ Sports Modes, QR Tray, Weather, Calculator, Games	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