I usually keep it up and in pause at all times (and my phone is always on), but some time I accidentally kill the app, or have to reboot the phone, and then I need to recall Chapter.mp3 and where in that particular chapter I stopped listening.
Yeah, this is a true first world issue, and you may simply tell me that TC Media Player is not intended for this sort of use and that there are plenty of other apps out there specifically developed for e.g. audio books and I agree, but since I use TC so damn much it feels handy to have everything in one place!
