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

Specification	Noise Junior Champ 3 ₹1,999 Prices and availability may change on the seller's site View Price	Fire-Boltt Axiom ₹1,999 Prices and availability may change on the seller's site View Price	Noise Twist Round dial ₹1,599 Prices and availability may change on the seller's site View Price	Fastrack Limitless FS2+ ₹1,599 Prices and availability may change on the seller's site View Price	Noise ColorFit Pulse 4 Max ₹1,899 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, Magnetic Charging Cable, Quick Start Guide, Warranty Card	Smartwatch, Magnetic Charging Cable, User Manual, Warranty Card
Model Name	Noise Junior Champ 3	Fire-Boltt Axiom	NoiseFit Twist	Fastrack Limitless FS2+	ColorFit Pulse 4 Max / NSW-421
Launch Date	30/09/2025	15/09/2025	12/01/2023	10/07/2024	18/07/2024
Colors	Black Blaze, Astro Orbit, Cotton Cloud, Arctic Storm	Black, Silver, Orange, Gold	Jet Black, Silver Grey, Rose Wine, Rose Pink, Space Blue	Charcoal Black, Wine Red, Copper Teal, Blue, Beige	Jet Black, Deep Wine, Rose Gold, Space Blue, Black Link, Calm Silver Link, Silver Link
Brand	Noise	FireBoltt	Noise	Fastrack	Noise
Display
Display Size	1.4, 3.55	1.43, 3.63	1.38, 3.5	2.01, 5.1	1.96, 4.98
Resolution	240, 240 pixels	466, 466 pixels	240, 240 pixels	320, 320 pixels	410, 502 pixels
Panel Type	IPS LCD	AMOLED	TFT LCD with 246 PPI pixel density	TFT LCD UltraVU Display	AMOLED with 190 ppi
Touch Type	Capacitive Touchscreen	Full Capacitive Touch	Multi-touch capacitive touchscreen	Capacitive Touchscreen	Capacitive multi-touch
Always-on Display	No	Yes	No	No	Yes
Brightness	5-level adjustable brightness	1000 nits (Peak)	550 nits peak brightness	Not specified	500-600 nits (estimated based on comparable models)
Refresh Rate	Not Specified	60Hz	Standard 60Hz (typical for TFT)	Not specified	Standard AMOLED refresh rate
Color Gamut / HDR Support	Not Specified	Not Specified	Standard RGB color gamut	Standard color gamut, no HDR support	Full color AMOLED display
Screen Protection	Not Specified	Flat Curved Glass	Not specified	Not specified	Curved tempered glass with anti-fingerprint coating
Body
Dimensions	44 x 40 x 13 mm	Standard 46mm dial size	45.7 x 52.2 x 11.9 mm	Not Specified	46.9 mm dial size
Weight	31 grams	60 g	27.6 grams	48 grams	39 grams
Case Material	Acrylonitrile Butadiene Styrene (ABS) plastic	Stainless Steel / Metal Alloy	PC+ABS plastic with metal unibody appearance	Polycarbonate	Metal with metallic finish
Front Protection	Not Specified	Curved Glass	Not specified	Not specified	Curved tempered glass with anti-fingerprint coating
Strap / Bracelet Options	Hypoallergenic silicone strap	Silicone, Stainless Steel (variant dependent)	22mm silicone with quick-release mechanism	Silicone	22mm silicone standard; metal mesh/chain and leather straps available separately
Removable / Replaceable Strap	Not Specified	Yes	Yes	No	Yes
Water Resistance	1 ATM (Up to 10m depth splash resistance)	IP68 Water Resistant	IP68 - Water resistant to 1.5m depth	IP68 (1.5m water resistance)	IP68 - Up to 1.5m depth
Dust Resistance	Not Specified	IP68 Dust Resistant	IP68 - Dust resistant	Yes, dust proof (IP68 certified)	IP68 certified
Durability Certifications	IP Certified	Not Specified	IP68 certified	IP68 certified	IP68 water and dust resistance certification
Primary Controls	Touch screen and single physical side button	Rotating Crown, Touch Screen, Push Button	Touch screen with gesture controls and wake-up gesture	Functional Crown (touch-sensitive), Touchscreen	Functional rotating crown, side push button, touch screen
Processor
Operating System	Proprietary Kids Smartwatch OS	Proprietary RTOS	Proprietary Real-Time Operating System (RTOS)	Android, iOS compatible	Proprietary Noise OS (compatible with iOS 11.0+ and Android 9.0+)
Chipset / SoC	Not Specified	Single Core Digital Chipset	Not publicly disclosed	Not Specified	Not Specified
CPU Cores & Clock Speed	Not Specified	Single Core	Not specified	Not Specified	Not specified
GPU	—	Integrated	Not specified	Not specified	Not Specified
Health & Fitness Sensors
Heart Rate Monitor	Optical heart rate sensor	Optical PPG Sensor	Yes - 24/7 continuous optical PPG monitoring	24x7 Heart Rate Monitoring	Yes - Optical PPG sensor with continuous and manual detection
ECG	Not Supported	No	Not available	No ECG support	No ECG support
SpO₂ / Blood Oxygen	SpO2 Blood Oxygen sensor	Yes	Yes - Blood oxygen saturation monitoring	SpO2 / Blood Oxygen Monitor with continuous monitoring	Yes - Optical SpO2 sensor
Skin Temperature Sensor	Not Supported	No	Not available	Not mentioned	Not available
Sleep Tracking	Monitors sleep duration and quality	Yes (Light, Deep, REM)	Yes - Automatic sleep detection with stage analysis	Sleep Tracker with sleep quality analysis	Yes - Detailed sleep stages (Light, Deep, REM)
Step Counter	Built-in pedometer	Yes	Yes - Pedometer with step tracking	Pedometer / Step Counter	Yes - Built-in pedometer
GPS	No built-in GPS tracking	No (Connected GPS only)	Not available - Bluetooth only	Connected GPS (via smartphone only)	No built-in GPS - Connected GPS only via smartphone
Accelerometer	3-axis accelerometer	Yes	Yes - Motion detection	Yes, Accelerometer sensor	Yes
Gyroscope	Not Specified	Not Specified	Yes - Rotation sensing	Not specified	Yes
Barometer	Not Supported	No	Not available	Not specified	No
Compass	Not Supported	No	Not available	Not specified	No
Other Sensors	Step counter, Calorie tracker, Distance tracker	Sedentary Reminder, Hydration Reminder	Stress monitor, activity tracking, calorie counter, female cycle tracker	Stress Monitor, Menstrual Cycle Tracker, Women's Health Tracking	Calorie burn estimation, activity history, stress measurement, menstrual cycle tracking, VO2 Max
Connectivity
Wi-Fi	Not Supported	No	Not available	No Wi-Fi support	No Wi-Fi support
Bluetooth	Bluetooth v5.3	Bluetooth 5.0	Bluetooth 5.3 with Tru Sync technology	Bluetooth 5.3	Bluetooth 5.3
NFC	No	No	No	No	No
Cellular Connectivity	No Cellular/SIM support	No	None - Bluetooth only	Bluetooth calling only (SingleSync), no standalone cellular	Wi-Fi Only (via smartphone)
ANT+	No	No	No	Not Specified	No
Battery
Capacity	270 mAh	300 mAh	300 mAh lithium-ion	280 mAh Lithium Polymer	300 mAh
Fast Charging Support	Not Specified	No	Not available	Yes - NitroFast Charging (10 min for 1 day use)	No fast charging support
Estimated Runtime	Up to 3 to 5 days on typical use	Up to 7 Days (Typical)	7 days typical use, 25 days standby, 2 days with heavy BT calling	Up to 7 days typical use, 10+ days standby	Up to 7 days typical use, 30 days standby
Charging Method	Magnetic Pogo Pin	Wireless Magnetic Dock	Proprietary magnetic pogo pins connector	Magnetic charging connector	Magnetic 2-pin connector
Battery Saver Modes	Scheduled Power Off	Power Saver Mode	Brightness reduction, disable 24/7 HR monitoring, low power mode	Not mentioned	Yes - Screen brightness reduction and selective heart rate monitoring
Memory & Storage
RAM	Not Specified	System RAM only	Not specified	Not officially specified	Not specified
Internal Storage	Not Specified	No user accessible storage	Limited (cloud-based watch faces only)	Not officially specified	Not specified
Expandable Storage	No	No	Not available	Not applicable	No expandable storage
Design & Comfort
Bezel Type	Fixed bezel with switchable poppy bumpers	Fixed with Rotating Crown	Fixed circular bezel with flat surface design	Fixed, minimal bezel	Fixed bezel with metallic finish
Buttons / Crown	Single physical side button	1 Rotating Crown, 1 Push Button	No physical buttons - Touch controls only	Functional Crown (touch and pressure sensitive)	Functional mechanical crown + side push button
Vibration Motor	Built-in vibration for alerts	Yes	Yes - Linear haptic motor for haptic feedback	Yes, haptic feedback vibration motor	Yes - Haptic feedback vibration alerts
Screen Glass Type	Not Specified	Glass	Standard protective glass (not specified)	Not specified	Curved tempered glass
Health & Safety Features
Fall Detection / SOS Calling	On-device SOS button and manual emergency contact storage	No	Not available	Emergency SOS capability available	Yes - SOS technology with emergency calling
Menstrual Cycle / Health Tracking	Not Supported	Yes (Female Health Tracking)	Yes - Female health tracking with cycle prediction	Women's Health Tracking with menstrual cycle tracking	Yes - Female health cycle tracker
Noise Monitoring	No	No	Not available	Not mentioned	No
Guided Breathing / Mindfulness Features	Not Specified	Breathing Exercises	Yes - Breathe Practice guided breathing exercises	Breathe Exercise feature	Yes - Guided breathing practice feature
Audio & Voice
Built-in Speaker	Built-in speaker for alerts and learning audio	Yes	Yes - For Bluetooth calling	Yes, built-in speaker	Yes
Microphone	Built-in microphone for voice notes	Yes	Yes - For Bluetooth calling	Yes, high-quality microphone	Yes - Dual microphone setup
Voice Assistant	No	AI Voice Assistant (Siri/Google via Phone)	Not available	Yes, AI Voice Assistant (compatible with Alexa)	Yes - AI Voice Assistant with AI Search feature
Bluetooth Audio Output	No	Phone Calls Only	Not available - No music streaming	Yes, via Bluetooth headphones	Yes - Bluetooth audio output for music control
Notifications & Controls
Notification Support	Call alerts, SMS/text alerts, and App notifications	Call, SMS, WhatsApp, Social Media	Yes - Call alerts, SMS alerts, app notifications with preview	Call Alerts, SMS/Messaging, App Notifications, Social Media Alerts	Call alerts, SMS/messaging alerts, social media app notifications
Quick Reply Options	Not Specified	No	Yes - Predefined quick reply messages only	Predefined Quick Replies (Android only)	Call rejection available (no voice/text reply)
Music Control / Playback	Remote music control for paired smartphone	Music Control (Remote)	Yes - Remote phone music control (play/pause, volume, track skip)	Full music control: Play/Pause, Volume, Previous/Next, Streaming control	Yes - Play/Pause, Next/Previous Track, Volume Control
Find My Phone	Yes	Yes	Yes - Locate paired smartphone	Yes, Find My Phone feature	Yes - Find My Phone feature
Remote Camera Shutter	Yes	Yes	Yes - Remote camera trigger for photos	Yes, Camera Control feature	Yes - Remote camera control from watch
Security
Fingerprint Sensor	No	No	No	Not Specified	No
Face Unlock	No	No	No	Not Specified	No
NFC Payment Security	No	No	Not available	No NFC support	No NFC support - no contactless payments
Find My Watch	Yes, via Noise Junior App	Yes (via App)	Not available	Not explicitly mentioned	Not confirmed in specifications
Ports & Accessories
Charging Connector Type	Magnetic Pogo Pin	Wireless Charging Dock	Proprietary magnetic pogo pins connector	Magnetic charging connector (proprietary)	Magnetic 2-pin proprietary connector
Optional Docks / Stands	Not Specified	None	None mentioned	None mentioned	Magnetic charging dock available separately
Bundled Extras	1 Smartwatch, 1 Magnetic Charger, 2 Extra Switchable Bumpers, User Manual, Warranty Card	Charging Cable, Manual	Magnetic charging cable, user manual, warranty card	Quick Start Guide, Warranty Card, Magnetic Charging Cable	User manual, warranty card, charging cable
Software & Apps
App Store Availability	No proprietary watch app store	No	Cloud-based proprietary store via NoiseFit app	Fastrack Smart World App (Google Play compatible)	NoiseFit App on Google Play Store and Apple App Store
Customization Options	100+ Cloud-based watch faces; 3-in-1 look via switchable bumpers	100+ Cloud Watch Faces	100+ cloud-based watch faces with customization through NoiseFit app	200+ Watchfaces, Multiple Menu Styles, Custom Watch Face Creation, 110+ Sports Modes, In-Built Games, Calculator	100+ cloud-based watch faces + AI Create feature for unlimited AI-powered custom watch face generation
Companion App	Noise Junior App	Fire-Boltt App / Da Fit	NoiseFit App - Health tracking, notifications, watch face management	Fastrack Smart World App (formerly Fastrack Reflex World App)	NoiseFit App (iOS 11.0+ / Android 9.0+)
OTA Updates	Supports over-the-air firmware updates	Yes	Yes - OTA firmware updates available	Yes, over-the-air updates available	Yes - OTA updates supported
Pre-installed Apps	Learning Hub (Games, EduCards, Quizzes), Habit Builder, Smart Scheduler, Alarm, Timer, Stopwatch, Weather	Alarm, Stopwatch, Timer, Weather, Calculator, Games	Noise Health Suite, Breathe Practice, Female Health Tracker, Stress Monitor, Sleep Monitor, Activity Tracker, 100+ Sports Modes, Calculator, Weather, Reminders, Alarm, Timer, Stopwatch, World Clock	110+ Sports Modes, 200+ Watchfaces, In-Built Games, AI Voice Assistant, Calculator, Alarm Clock, Stopwatch, Timer, Stress Monitor	NoiseFit Health Suite, AI voice assistant, activity tracking, weather app, calculator, stopwatch, timer, alarm, reminder, music control