What exactly does the "calorie" total represent?

Caynax Apps Caynax Sports Tracker
1

What am I missing here?
Used Caynex Sports Tracker app this morning for a 4.5 mile walk.
At the end, all the stats looked about right, EXCEPT: 290 kcal

290,000 calories?

2

Hi
1 cal (calorie) - in lower case
1 Cal (Calorie) - in upper case = equals to 1000 calories (in lower case)
1 kcal = 1 kilo calories → 1000 calories = 1 Cal