The first two went free for a bit last week iirc, the second 2 just went free. The iTunes Store is timing out on me for some reason so I can't post the links. Plus, there are 4 links. If someone would be so kind, go ahead and post the links. Or, considering I properly spelled the apps, you can always go to the appstore and search.
Here's one link, just press developer info to get to all the other apps.... https://itunes.apple.com/us/app/sketch-synth-3d/id489306717?mt=8
Or a direct link to the developer's apps: https://itunes.apple.com/us/artist/shape-of-sound-limited/id489306720
