I love these kind of apps, and own many of the best of them. The only issue that I have, is that after hearing one of the nature loops for a while, my ears will begin then to pick up the “seams” in the recording, meaning, that the files should be way bigger than they are, that is to say longer in duration, and as they are in the amazing hands down winner grandaddy of all environmental sound apps, ENVIRONMENTS. Here, I can completely tell when the loop begins anew, and then after a while of hearing it, it actually starts to bother me, as I have become accustomed to the repetition of what should be natural and seamless soundscapes, lasting much longer (so as to fool the ears and the brain) into believing one is actually present within nature, and not on a holodeck. The other issue is the sound quality, as once again ENVIRONMENTS wins hands down ... I don’t know what quality sound file, compression, they are using here, but it must be relatively small, for look at the size of PureNature (Environments, once again,is over half a gigabyte in comparison, and with less sounscapes, although theirs run nearly an hour each). Other than that, though, this is nice.