Here is My favourite 5 smartwatch . I personaly like them. I Gave my opinion on it. If you want then you can buy one of the.

Apple WATCH source

1. Apple Watch Series 3 : It is very good smart watch From Apple.It is one of my favourite smart watch thats why i
   marked in 1. If your budget is around 400$ then you can go for it . It has a dashing look because it is from apple. Apple Product are always awesome and very good for daily use.

Features:

• Built-in GPS and GLONASS
• Dual-core processor
• W2 chip
• Barometric altimeter
• Memory 8gb
• Water resistant 50 meters
• Built in Wi-Fi
• Built in Bluetooth 4.2
• 16-18h battery life
• watchOS 4
• Magnetic Charging System

I will personally recomanded you for Apple Watch Series 3 if you have a big budget.

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2 .LG Watch Sport : Its a good smartwatch in around 240$ Budget. It Comes From LG.

Features:

• 1.38-inch Full Circle P-OLED Display
• 4G LTE Wireless Connectivity
• "OK GOOGLE"
• Make Calls
• Wireless Charging
• IP68 Water and Dust Resistance
• ANDROID WEAR 2.0
• Alarm, Timer, and Stopwatch
• Customizable Font Sizes
• 1.1 GHz Qualcomm® Snapdragon™ Quad-Core MSM8909w Processor
• 1.38" P-OLED Display
• 768 MB RAM

So it was its features you can buy it. It is good on this budget

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3 . Amaze Fit Pace : Amazfit Pace watch is our GPS-enabled sports smartwatch .Its automatically tracks your daily steps, distance, calories, and sleep. Activity and sport modes for: Outdoor/Indoor Run, Trail Run, Walk, Outdoor/Indoor Bike, Elliptical, and more. It is Mid Budget Smartwatch . Its Price Around 135-170$. It has a Very great Bettary life. It comes in 2 color orange and grey.

Features:

• Built In GPS
• 4 GB Storage
• Run Tracking
• Heart Rate Sensors
• 5 days of battery life
• 54.5 g Weight / Lightweight
• 1.2 GHz Core Proccesor
• Built In Bluetooth 4.0
• Built In Wifi
• IP67, resistant to water and dust
• 1.34'' Display size
• 1-YEAR LIMITED WARRANTY

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4 . Sumsung Gear Fit 2 : Sumsung gear fit 2 is an another Mid Budget Smart watch . It comes into 3 color blue, pink and black. You can Track your step count, calories burned, heart rate, sleep Quality and More by this device.It is good for daily uses. If your bidget is around 80-100$ then you can go for it.

Features:

• 512 RAM
• 4 gb Storage
• 1.5” Touch Curved AMOLED Display
• 3-4 Days Battery Backup
• Receive and respond to notifications, calls and texts right on your wrist.
• Bluetooth v4.2
• GPS, Glonass
• 1.5" curved amoled Display
• 28 gms Weight
• 24h Tracker
• Built In heart rate Sensor
• Gorilla glass 3

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5 . Mi Band 2 : If you are searching for a low budget smartwatch which will can give you a great user experience. Then Mi Band 2 is for you. It is the best smartwacth in 25-35$ budget. You will get some great feature.

Features:

• Fitness Tracker
• Smart Reminder
• Sleep Monitor
• IP67 Water-Resistant Wristband Watch
• OLED display
• Pedometer algorithm
• Gentle and Skin-friendly
• Built in Bluetooth

You will get these feature on this smart watch. So You can buy it if your budget is low.

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IF YOU WANT TO ADD SOME EXTRA SMART WATCH WHICH YOU LIKE

THEN PLEASE COMMENT AND FOLLOW ME!