![](https://play-lh.googleusercontent.com/EGemoI2NTXmTsBVtJqk8jxF9rh8ApRWfsIMQSt2uE4OcpQqbFu7f7NbTK05lx80nuSijCz7sc3a277R67g=s32)
Google 使用者
It does not release memory after I delete a lesson. I have to reset the app periodically to free up memory (LG V10 & those listed below). / Considering the file size (~1G per hour), it's strange that it does not support external storage (note4, notepro12, galaxy s8.4, Xperia z ultra). Five stars if it can.