Uses a LOT of space

I ADORE this app. I love waking up and seeing how much sleep I got. Ive been using it for several months now. I noticed that my ipod has been slowly filling up every time I plug it in despite me not adding more music. Today I thought to check what apps are using the most space..... this app has taken 13.3gb space, more than my music!!! I only record my sleep pattern, I dont record sleep talking or ANYTHING extra. So today I have to delete this app. My ipod is in the red and almost completely full. I guess I could continuously delete the data, but for now Im going to delete this app until the dev fixes this issue. Its a BIGGGG problem! If it werent for this issue Id give the app 5 stars.

Kurasii about Sleep Meister Lite, v1.10.15