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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	Boult Crown R Pro ₹2,399 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 Twist Go ₹1,599 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	Crown R Pro	Fastrack Limitless FS2+	NoiseFit Twist Go
Launch Date	30/09/2025	15/09/2025	18/06/2023	10/07/2024	31/10/2023
Colors	Black Blaze, Astro Orbit, Cotton Cloud, Arctic Storm	Black, Silver, Orange, Gold	Frozen Silver, Thunder Black, Volcanic Orange	Charcoal Black, Wine Red, Copper Teal, Blue, Beige	Jet Black, Silver Grey, Rose Pink, Gold Link, Silver Link, Elite Black, Rose Wine
Brand	Noise	FireBoltt	GoBoult	Fastrack	Noise
Display
Display Size	1.4, 3.55	1.43, 3.63	1.43, 3.63	2.01, 5.1	1.39, 3.53
Resolution	240, 240 pixels	466, 466 pixels	466, 466 pixels	320, 320 pixels	240, 240 pixels
Panel Type	IPS LCD	AMOLED	Super AMOLED	TFT LCD UltraVU Display	TFT LCD
Touch Type	Capacitive Touchscreen	Full Capacitive Touch	Full Touch	Capacitive Touchscreen	Full Touch
Always-on Display	No	Yes	Yes	No	No
Brightness	5-level adjustable brightness	1000 nits (Peak)	600 nits	Not specified	Up to 500 nits
Refresh Rate	Not Specified	60Hz	60 Hz	Not specified	60Hz
Color Gamut / HDR Support	Not Specified	Not Specified	Not Specified	Standard color gamut, no HDR support	Not Specified
Screen Protection	Not Specified	Flat Curved Glass	2.5D Curved Glass	Not specified	2.5D Glass
Body
Dimensions	44 x 40 x 13 mm	Standard 46mm dial size	46 x 46 x 11 mm (Approx)	Not Specified	Round Dial, approx. 46mm diameter (exact mm not specified)
Weight	31 grams	60 g	56.5 g	48 grams	Approx. 40g - 45g
Case Material	Acrylonitrile Butadiene Styrene (ABS) plastic	Stainless Steel / Metal Alloy	Zinc Alloy Frame	Polycarbonate	Metallic Finish (Zinc Alloy) with Polycarbonate back
Front Protection	Not Specified	Curved Glass	Glass	Not specified	2.5D Curved Glass
Strap / Bracelet Options	Hypoallergenic silicone strap	Silicone, Stainless Steel (variant dependent)	Silicone, Metallic (variant dependent)	Silicone	22mm Silicone, Metallic Link, or Mesh options
Removable / Replaceable Strap	Not Specified	Yes	Yes	No	Yes
Water Resistance	1 ATM (Up to 10m depth splash resistance)	IP68 Water Resistant	IP67 Water Resistant	IP68 (1.5m water resistance)	IP67 Water Resistant
Dust Resistance	Not Specified	IP68 Dust Resistant	IP67 Dust Resistant	Yes, dust proof (IP68 certified)	IP67 Dust Resistant
Durability Certifications	IP Certified	Not Specified	None	IP68 certified	Not Specified
Primary Controls	Touch screen and single physical side button	Rotating Crown, Touch Screen, Push Button	Touch Screen, Functional Crown, Push Button	Functional Crown (touch-sensitive), Touchscreen	Touch Screen, Functional Rotating Crown
Processor
Operating System	Proprietary Kids Smartwatch OS	Proprietary RTOS	Boult OS (RTOS)	Android, iOS compatible	Noise OS (RTOS)
Chipset / SoC	Not Specified	Single Core Digital Chipset	Single-chip 2-in-1 Bluetooth SoC	Not Specified	Single-chip Tru Sync™ Technology
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	24/7 Heart Rate Monitor	24x7 Heart Rate Monitoring	24/7 Heart Rate Monitor
ECG	Not Supported	No	No	No ECG support	No
SpO₂ / Blood Oxygen	SpO2 Blood Oxygen sensor	Yes	SpO2 Sensor	SpO2 / Blood Oxygen Monitor with continuous monitoring	SpO2 Monitoring
Skin Temperature Sensor	Not Supported	No	No	Not mentioned	No
Sleep Tracking	Monitors sleep duration and quality	Yes (Light, Deep, REM)	Sleep Monitor (Light, Deep, REM)	Sleep Tracker with sleep quality analysis	Sleep Monitor with Stages
Step Counter	Built-in pedometer	Yes	Yes	Pedometer / Step Counter	Yes
GPS	No built-in GPS tracking	No (Connected GPS only)	Connected GPS	Connected GPS (via smartphone only)	No (Connected GPS)
Accelerometer	3-axis accelerometer	Yes	Yes	Yes, Accelerometer sensor	Yes
Gyroscope	Not Specified	Not Specified	Not Specified	Not specified	No
Barometer	Not Supported	No	No	Not specified	No
Compass	Not Supported	No	No	Not specified	No
Other Sensors	Step counter, Calorie tracker, Distance tracker	Sedentary Reminder, Hydration Reminder	Blood Pressure (Simulated), Menstrual Cycle Tracker, Breath Training	Stress Monitor, Menstrual Cycle Tracker, Women's Health Tracking	Stress Monitor, Breathe Practice, Female Cycle Tracker
Connectivity
Wi-Fi	Not Supported	No	No	No Wi-Fi support	No
Bluetooth	Bluetooth v5.3	Bluetooth 5.0	Bluetooth 5.2	Bluetooth 5.3	Bluetooth v5.3
NFC	No	No	No	No	No
Cellular Connectivity	No Cellular/SIM support	No	No	Bluetooth calling only (SingleSync), no standalone cellular	No
ANT+	No	No	No	Not Specified	No
Battery
Capacity	270 mAh	300 mAh	Not Specified (Approx 250-300mAh)	280 mAh Lithium Polymer	210 mAh
Fast Charging Support	Not Specified	No	No	Yes - NitroFast Charging (10 min for 1 day use)	No
Estimated Runtime	Up to 3 to 5 days on typical use	Up to 7 Days (Typical)	Up to 5 Days (Typical)	Up to 7 days typical use, 10+ days standby	Up to 7 Days (Typical), 2 Days (Calling)
Charging Method	Magnetic Pogo Pin	Wireless Magnetic Dock	Magnetic Charging	Magnetic charging connector	Magnetic Charging
Battery Saver Modes	Scheduled Power Off	Power Saver Mode	Yes	Not mentioned	Power Saving Mode
Memory & Storage
RAM	Not Specified	System RAM only	Not Specified	Not officially specified	Not Specified
Internal Storage	Not Specified	No user accessible storage	Not Specified	Not officially specified	Stores call logs and up to 10 contacts
Expandable Storage	No	No	No	Not applicable	No
Design & Comfort
Bezel Type	Fixed bezel with switchable poppy bumpers	Fixed with Rotating Crown	Fixed	Fixed, minimal bezel	Fixed Metallic Bezel
Buttons / Crown	Single physical side button	1 Rotating Crown, 1 Push Button	Rotating Crown + 1 Button	Functional Crown (touch and pressure sensitive)	2 (Side Button + Rotating Crown)
Vibration Motor	Built-in vibration for alerts	Yes	Yes	Yes, haptic feedback vibration motor	Yes
Screen Glass Type	Not Specified	Glass	2.5D Glass	Not specified	2.5D Curved Glass
Health & Safety Features
Fall Detection / SOS Calling	On-device SOS button and manual emergency contact storage	No	No	Emergency SOS capability available	No
Menstrual Cycle / Health Tracking	Not Supported	Yes (Female Health Tracking)	Female Health Tracker	Women's Health Tracking with menstrual cycle tracking	Female Cycle Tracker
Noise Monitoring	No	No	No	Not mentioned	No
Guided Breathing / Mindfulness Features	Not Specified	Breathing Exercises	Breath Training	Breathe Exercise feature	Breathe Practice
Audio & Voice
Built-in Speaker	Built-in speaker for alerts and learning audio	Yes	Yes	Yes, built-in speaker	Yes
Microphone	Built-in microphone for voice notes	Yes	Yes	Yes, high-quality microphone	Yes
Voice Assistant	No	AI Voice Assistant (Siri/Google via Phone)	Yes (AI Voice Assistant)	Yes, AI Voice Assistant (compatible with Alexa)	AI Voice Assistant (Siri/Google)
Bluetooth Audio Output	No	Phone Calls Only	No	Yes, via Bluetooth headphones	No
Notifications & Controls
Notification Support	Call alerts, SMS/text alerts, and App notifications	Call, SMS, WhatsApp, Social Media	Call, SMS, App Notifications	Call Alerts, SMS/Messaging, App Notifications, Social Media Alerts	Call, SMS, Social Media, Email
Quick Reply Options	Not Specified	No	No	Predefined Quick Replies (Android only)	Quick Reply (Android Only)
Music Control / Playback	Remote music control for paired smartphone	Music Control (Remote)	Music Control (Phone)	Full music control: Play/Pause, Volume, Previous/Next, Streaming control	Remote Music Control
Find My Phone	Yes	Yes	Yes	Yes, Find My Phone feature	Yes
Remote Camera Shutter	Yes	Yes	Yes	Yes, Camera Control feature	Yes
Security
Fingerprint Sensor	No	No	No	Not Specified	No
Face Unlock	No	No	No	Not Specified	No
NFC Payment Security	No	No	No	No NFC support	No
Find My Watch	Yes, via Noise Junior App	Yes (via App)	Yes (via App)	Not explicitly mentioned	Yes (via App)
Ports & Accessories
Charging Connector Type	Magnetic Pogo Pin	Wireless Charging Dock	Magnetic Pogo Pin	Magnetic charging connector (proprietary)	Magnetic Pogo Pin
Optional Docks / Stands	Not Specified	None	None	None mentioned	None
Bundled Extras	1 Smartwatch, 1 Magnetic Charger, 2 Extra Switchable Bumpers, User Manual, Warranty Card	Charging Cable, Manual	Charging Cable, User Manual	Quick Start Guide, Warranty Card, Magnetic Charging Cable	Charging Cable, User Manual
Software & Apps
App Store Availability	No proprietary watch app store	No	None	Fastrack Smart World App (Google Play compatible)	No
Customization Options	100+ Cloud-based watch faces; 3-in-1 look via switchable bumpers	100+ Cloud Watch Faces	150+ Watch Faces, Menu Styles	200+ Watchfaces, Multiple Menu Styles, Custom Watch Face Creation, 110+ Sports Modes, In-Built Games, Calculator	100+ Cloud Watch Faces
Companion App	Noise Junior App	Fire-Boltt App / Da Fit	Boult Fit (GoBoult Fit)	Fastrack Smart World App (formerly Fastrack Reflex World App)	NoiseFit App
OTA Updates	Supports over-the-air firmware updates	Yes	Yes	Yes, over-the-air updates available	Yes
Pre-installed Apps	Learning Hub (Games, EduCards, Quizzes), Habit Builder, Smart Scheduler, Alarm, Timer, Stopwatch, Weather	Alarm, Stopwatch, Timer, Weather, Calculator, Games	Alarm, Stopwatch, Weather, Calculator, Games	110+ Sports Modes, 200+ Watchfaces, In-Built Games, AI Voice Assistant, Calculator, Alarm Clock, Stopwatch, Timer, Stress Monitor	Alarm, Stopwatch, Timer, Weather, Calculator, World Clock