Changing your password is a simple process within your TrackR app.
With the TrackR app open:
Step 1: Click the three stacked lines in the upper lefthand corner
Step 2: Click "Account"
Step 3: Scroll to the bottom of your Account settings and select "Change Password"
Step 4: Input your current password
Step 5: Input your new password and confirm it.
Below is a visual guide.