Hi, I'm the developer of the app in question, so this is a promotion. 5 years ago I made a useless, colorful app called Magic Fluids and released it on Google Play. It became quite popular, and I've wanted to convert it to iOS ever since, but had various life circumstances along the way that slowed me down. Last week, I finally managed to wrap up the convertion and release it on Apple App Store. This video is just 30 seconds: Here are links to free and paid versions of the app: https://itunes.apple.com/us/app/id1437514764 https://itunes.apple.com/us/app/id1437510558 And here's a couple of promo codes - feel free to use them: XPPN9J7F37HM RN346RNX7NW9 L4NYL77TNXJM Obligatory rules on promo codes: Codes expire on Sun Dec 09 03:32:03 PST 2018 and is redeemable only on the iTunes Store for United States. Requires an iTunes account, subject to prior acceptance of license and usage terms. To open an account you must be above the age of 13 and in United States. Compatible software and hardware, and internet access (fees may apply) required. Not for resale. Full terms apply; see www.apple.com/legal/itunes/ww/. For more information, see www.apple.com/support/. This app is provided to you by MAD SCIENTIST SP Z O O This is my first time as iOS developer. I gladly welcome any criticism and advice. I'm also happy to write more about the app (e.g. the tech behind it), if anyone's interested.