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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	Realme Watch S2 ₹2,799 Prices and availability may change on the seller's site View Price	Noise Junior Champ 3 ₹1,999 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	Smartwatch, Charging Cable, User Manual, Silicone Strap	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card
Model Name	ColorFit Pulse 4 Max / NSW-421	Fire-Boltt Axiom	Crown R Pro	Realme Watch S2	Noise Junior Champ 3
Launch Date	18/07/2024	15/09/2025	18/06/2023	30/07/2024	30/09/2025
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	Midnight Black, Ocean Silver, Metallic Grey	Black Blaze, Astro Orbit, Cotton Cloud, Arctic Storm
Brand	Noise	FireBoltt	GoBoult	Realme	Noise
Display
Display Size	1.96, 4.98	1.43, 3.63	1.43, 3.63	1.43, 3.63	1.4, 3.55
Resolution	410, 502 pixels	466, 466 pixels	466, 466 pixels	466, 466 pixels	240, 240 pixels
Panel Type	AMOLED with 190 ppi	AMOLED	Super AMOLED	AMOLED with 326 ppi density	IPS LCD
Touch Type	Capacitive multi-touch	Full Capacitive Touch	Full Touch	Capacitive multi-touch	Capacitive Touchscreen
Always-on Display	Yes	Yes	Yes	Yes	No
Brightness	500-600 nits (estimated based on comparable models)	1000 nits (Peak)	600 nits	600 nits peak brightness	5-level adjustable brightness
Refresh Rate	Standard AMOLED refresh rate	60Hz	60 Hz	60 Hz	Not Specified
Color Gamut / HDR Support	Full color AMOLED display	Not Specified	Not Specified	Full color AMOLED (HDR not specified)	Not Specified
Screen Protection	Curved tempered glass with anti-fingerprint coating	Flat Curved Glass	2.5D Curved Glass	7H scratch-resistant glass with Always-On Display support	Not Specified
Body
Dimensions	46.9 mm dial size	Standard 46mm dial size	46 x 46 x 11 mm (Approx)	46.5 x 46.5 x 11 mm	44 x 40 x 13 mm
Weight	39 grams	60 g	56.5 g	41 grams	31 grams
Case Material	Metal with metallic finish	Stainless Steel / Metal Alloy	Zinc Alloy Frame	Zinc Alloy with electroplating and PVD coating	Acrylonitrile Butadiene Styrene (ABS) plastic
Front Protection	Curved tempered glass with anti-fingerprint coating	Curved Glass	Glass	7H Scratch-resistant glass	Not Specified
Strap / Bracelet Options	22mm silicone standard; metal mesh/chain and leather straps available separately	Silicone, Stainless Steel (variant dependent)	Silicone, Metallic (variant dependent)	Silicone (standard, removable) or Stainless Steel optional bands, 22mm width, 150-230mm length	Hypoallergenic silicone strap
Removable / Replaceable Strap	Yes	Yes	Yes	Yes	Not Specified
Water Resistance	IP68 - Up to 1.5m depth	IP68 Water Resistant	IP67 Water Resistant	IP68 + 5 ATM (up to 5 meters for 30 minutes)	1 ATM (Up to 10m depth splash resistance)
Dust Resistance	IP68 certified	IP68 Dust Resistant	IP67 Dust Resistant	IP68 dust and water resistant	Not Specified
Durability Certifications	IP68 water and dust resistance certification	Not Specified	None	IP68 certified, Scratch resistant, Temperature range: -40°C to +70°C	IP Certified
Primary Controls	Functional rotating crown, side push button, touch screen	Rotating Crown, Touch Screen, Push Button	Touch Screen, Functional Crown, Push Button	Crown button on right side + 1 additional button + Capacitive touchscreen	Touch screen and single physical side button
Processor
Operating System	Proprietary Noise OS (compatible with iOS 11.0+ and Android 9.0+)	Proprietary RTOS	Boult OS (RTOS)	Proprietary RTOS (Real-Time Operating System)	Proprietary Kids Smartwatch OS
Chipset / SoC	Not Specified	Single Core Digital Chipset	Single-chip 2-in-1 Bluetooth SoC	ATS3085S (Dual-mode Bluetooth processor with MCU + DSP architecture)	Not Specified
CPU Cores & Clock Speed	Not specified	Single Core	Not Specified	Dual-core MCU + DSP	Not Specified
GPU	Not Specified	Integrated	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	24/7 continuous monitoring with abnormal HR alert	Optical heart rate sensor
ECG	No ECG support	No	No	No ECG support	Not Supported
SpO₂ / Blood Oxygen	Yes - Optical SpO2 sensor	Yes	SpO2 Sensor	24/7 continuous blood oxygen monitoring	SpO2 Blood Oxygen sensor
Skin Temperature Sensor	Not available	No	No	No skin temperature sensor	Not Supported
Sleep Tracking	Yes - Detailed sleep stages (Light, Deep, REM)	Yes (Light, Deep, REM)	Sleep Monitor (Light, Deep, REM)	24-hour sleep monitoring with sleep stage analysis (light, deep, REM)	Monitors sleep duration and quality
Step Counter	Yes - Built-in pedometer	Yes	Yes	Yes - pedometer with step count tracking	Built-in pedometer
GPS	No built-in GPS - Connected GPS only via smartphone	No (Connected GPS only)	Connected GPS	No GPS (no built-in or connected GPS)	No built-in GPS tracking
Accelerometer	Yes	Yes	Yes	Yes - 3-axis accelerometer	3-axis accelerometer
Gyroscope	Yes	Not Specified	Not Specified	Yes - gyroscope sensor	Not Specified
Barometer	No	No	No	Yes - barometer for altitude tracking	Not Supported
Compass	No	No	No	Yes - compass sensor	Not Supported
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	Ambient light sensor, altimeter, stress monitor (HRV-based), menstrual cycle tracker	Step counter, Calorie tracker, Distance tracker
Connectivity
Wi-Fi	No Wi-Fi support	No	No	No Wi-Fi	Not Supported
Bluetooth	Bluetooth 5.3	Bluetooth 5.0	Bluetooth 5.2	Bluetooth 5.3 with 10-meter connectivity range	Bluetooth v5.3
NFC	No	No	No	No	No
Cellular Connectivity	Wi-Fi Only (via smartphone)	No	No	Bluetooth only (no cellular, Wi-Fi, or satellite)	No Cellular/SIM support
ANT+	No	No	No	No	No
Battery
Capacity	300 mAh	300 mAh	Not Specified (Approx 250-300mAh)	380 mAh Li-ion non-removable	270 mAh
Fast Charging Support	No fast charging support	No	No	Yes - approximately 60 minutes for full charge	Not Specified
Estimated Runtime	Up to 7 days typical use, 30 days standby	Up to 7 Days (Typical)	Up to 5 Days (Typical)	14 days typical use, 20 days with custom battery mode, 5 days with Always-On Display, 38 days standby	Up to 3 to 5 days on typical use
Charging Method	Magnetic 2-pin connector	Wireless Magnetic Dock	Magnetic Charging	Magnetic dock/wired connector	Magnetic Pogo Pin
Battery Saver Modes	Yes - Screen brightness reduction and selective heart rate monitoring	Power Saver Mode	Yes	Customizable ultra-long battery mode, AI-optimized battery mode, time-only mode	Scheduled Power Off
Memory & Storage
RAM	Not specified	System RAM only	Not Specified	8 MB PSRAM	Not Specified
Internal Storage	Not specified	No user accessible storage	Not Specified	4 GB Flash (500 MB user-accessible for music)	Not Specified
Expandable Storage	No expandable storage	No	No	No microSD card slot	No
Design & Comfort
Bezel Type	Fixed bezel with metallic finish	Fixed with Rotating Crown	Fixed	Fixed circular bezel with watch-inspired design	Fixed bezel with switchable poppy bumpers
Buttons / Crown	Functional mechanical crown + side push button	1 Rotating Crown, 1 Push Button	Rotating Crown + 1 Button	1 rotating crown button on right side + 1 additional action button	Single physical side button
Vibration Motor	Yes - Haptic feedback vibration alerts	Yes	Yes	Yes - haptic vibration motor	Built-in vibration for alerts
Screen Glass Type	Curved tempered glass	Glass	2.5D Glass	7H scratch-resistant mineral glass	Not Specified
Health & Safety Features
Fall Detection / SOS Calling	Yes - SOS technology with emergency calling	No	No	No fall detection or emergency SOS calling	On-device SOS button and manual emergency contact storage
Menstrual Cycle / Health Tracking	Yes - Female health cycle tracker	Yes (Female Health Tracking)	Female Health Tracker	Yes - menstrual cycle tracking with prediction and period reminder	Not Supported
Noise Monitoring	No	No	No	Ambient volume monitoring (no formal noise exposure detection)	No
Guided Breathing / Mindfulness Features	Yes - Guided breathing practice feature	Breathing Exercises	Breath Training	Yes - guided breathing exercises and mindfulness reminders via Realme Link app	Not Specified
Audio & Voice
Built-in Speaker	Yes	Yes	Yes	Yes - up to 90 dB speaker with 10-meter microphone pickup in quiet environments	Built-in speaker for alerts and learning audio
Microphone	Yes - Dual microphone setup	Yes	Yes	Yes - high-performance microphone for Bluetooth calling	Built-in microphone for voice notes
Voice Assistant	Yes - AI Voice Assistant with AI Search feature	AI Voice Assistant (Siri/Google via Phone)	Yes (AI Voice Assistant)	Yes - ChatGPT 3.5 powered AI assistant with voice-controlled watch face generation	No
Bluetooth Audio Output	Yes - Bluetooth audio output for music control	Phone Calls Only	No	Yes - supports Bluetooth audio playback and streaming	No
Notifications & Controls
Notification Support	Call alerts, SMS/messaging alerts, social media app notifications	Call, SMS, WhatsApp, Social Media	Call, SMS, App Notifications	Call alerts, SMS/messaging alerts, app notifications, rich notifications	Call alerts, SMS/text alerts, and App notifications
Quick Reply Options	Call rejection available (no voice/text reply)	No	No	Predefined messages only (no voice or custom text reply on watch)	Not Specified
Music Control / Playback	Yes - Play/Pause, Next/Previous Track, Volume Control	Music Control (Remote)	Music Control (Phone)	Play/Pause, Next/Previous track, Volume control, Local MP3 storage playback	Remote music control for paired smartphone
Find My Phone	Yes - Find My Phone feature	Yes	Yes	Yes - Find My Phone feature via Realme Link app	Yes
Remote Camera Shutter	Yes - Remote camera control from watch	Yes	Yes	Yes - remote camera shutter control	Yes
Security
Fingerprint Sensor	No	No	No	No	No
Face Unlock	No	No	No	No	No
NFC Payment Security	No NFC support - no contactless payments	No	No	No NFC payment capability	No
Find My Watch	Not confirmed in specifications	Yes (via App)	Yes (via App)	Not officially specified	Yes, via Noise Junior App
Ports & Accessories
Charging Connector Type	Magnetic 2-pin proprietary connector	Wireless Charging Dock	Magnetic Pogo Pin	Proprietary magnetic dock connector	Magnetic Pogo Pin
Optional Docks / Stands	Magnetic charging dock available separately	None	None	N/A	Not Specified
Bundled Extras	User manual, warranty card, charging cable	Charging Cable, Manual	Charging Cable, User Manual	Smartwatch, Charging Cable, User Manual, Silicone Strap; Extra straps available in multiple colors (sold separately)	1 Smartwatch, 1 Magnetic Charger, 2 Extra Switchable Bumpers, User Manual, Warranty Card
Software & Apps
App Store Availability	NoiseFit App on Google Play Store and Apple App Store	No	None	Realme Link app - available on Google Play Store and Apple App Store	No proprietary watch 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	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; 3-in-1 look via switchable bumpers
Companion App	NoiseFit App (iOS 11.0+ / Android 9.0+)	Fire-Boltt App / Da Fit	Boult Fit (GoBoult Fit)	Realme Link (Android & iOS compatible)	Noise Junior App
OTA Updates	Yes - OTA updates supported	Yes	Yes	Yes - Over-the-Air updates supported	Supports over-the-air firmware updates
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	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	Learning Hub (Games, EduCards, Quizzes), Habit Builder, Smart Scheduler, Alarm, Timer, Stopwatch, Weather