IIRC, caustic was developed by a former game dev, and as such he worked hard to make it efficient and look good on all kinda of devices. For a while it was the

IIRC, caustic was developed by a former game dev, and as such he worked hard to make it efficient and look good on all kinda of devices. For a while it was the most expensive app I had on my phone, and I bought it only to support the developer. There was an iOS port last time I checked, but maybe he decided to pull it?