We find it useful to re-direct the logging to the user folder, so you can use a file explorer on the device to access it. Something like this (making sure this code runs before any other kivy imports...
```
from kivy.config import Config
from helpers.localos import get_user_path # Basically expandpath('~') + ".<appnam>"
from os.path import join, exists
from os import makedirs
""" Sets the path to the log file. """
log_path = join(get_user_path(), 'logs')
if not exists(log_path):
makedirs(log_path)
Config.set('kivy', 'log_dir', log_path)
```