Which app should I use for iPhone 5s motion sensor?

[Engr Aamir Khan Niazi]

I am losing weight and I want to know how much today I walked and pace of my walking.
Which app should I download because there is no such app from Apple which should be synced with iPhone 5s motion sensor.

 

[Ledsteplin]

This is the first one that comes up when I enter "walking tracker" in the App Store search bar.

Map My Walk - GPS Walking and Step Tracking Pedometer for Calories and Weight Loss by Under Armour
https://appsto.re/us/0Fzws.i