1. Open the Oxiline App
2. Login
3. Tap the device you wish to see the logged data from
4. Tap the "Log" tab at the top (image 1)
5. Tap on "Last 7 Days" to change the data range of the logs (image 2)
6. Tap desired date range (image 3)
7. Tap "Save"  (image 3)

(image 1)

(image 2)

(image 3)