I am surprised by how many people seem to like this but beauty is in the eye of the beholder as the old saying goes I suppose. I rate this app with one star because it is simply displaying a poorly made video and thus it is not possible to control anything displayed such as the ridiculous number of fish and the high speed at which they are swimming about. Too much of a good thing is not always a good thing. Nobody would ever crowd a fish tank like this I hope. Nobody would ever dump copious amounts of caffeine in there either causing the fish to lose thier minds and swim about at high speed experiencing panic attacks that just won’t quit. Those poor little fishies! I could not bear to watch this for long. Another problem with just looping a short video is there is no randomness to the fishtank. Worst of all, unless the native resolution of your display just happens to be 720p, the visual quality which does not appear to have been very good to begin with degrades further. At 1440p on my 27” iMac this looks terrible and I am not usually that fussy. For example, I enjoy classic games with looks that are nothing to write home to mom about. The free version notes in its options I think it was that upgrading would remove intrusive ads that pop up. I did not stick around long enough to see one of these myself. I know it is free and I am being hard on this one but I am just being honest. I think Apple needs to set a little higher bar regarding what it will permit to even appear on the App Store myself. This shouldn’t have made it past review.