Sensors which is only employed in Flagship or Higher-end smartphones
- Humidity sensor
 - pedometer sensor
 - Heart rate sensor
 - Barometer sensor
 
- This sensor is most widely used for fitness purposes it measures the number of steps that the user has walked through the world.
 - It can also be done via Accelerometer but a pedometer gives accurate results.
 - This can be seen in fitness tracker watches and even higher-end smartphones.
 
Heart rate Sensor
- By the name itself, we can understand that it can able to detect the realtime heartbeat rate of our own body.
 - This sensor can give the exact heartbeat rate of the user.
 
Barometer sensor
- In most common barometer sensor is used to measure atmospheric pressure.
 - In smartphones, the barometer sensor helps GPS to find an accurate location.
 - Consider that you are on the top of the hill barometer sensor will measure the distance from you to the bottom of the hill.
 
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