I bought the full version of this app and all features years ago. Along with the Infinite Painter app. BOTH were awesome but unfortunately I have had multiple errors with Infinite design recently. Just in the last month I the app failed while trying to work on a project that is much smaller than others I have done with this app in the past. The first error locked me out and didn't recognize me as a paid user, which I have been for a handful of years. I had to re-install the app to get it to recognize my credentials. Perhaps my bad, but the uninstall process took with it my saved projects that weren't exported to SVG or PNG. Those were gone and unrecoverable. I started the project over again and near completion most of the layers I had cleared themselves and hours and hours of work was lost. I have reached out via their email because their forum won't let me create an account and they basically gave me a response that sounded like it was blaming me for their apps inability to function. It pains me to walk away from Infinite Design. It was the best Vector drawing app but 2 losses in a month and a loss at the end of last year has taught me I can not rely on this app for projects anymore. Apart from that some of the functions in the app have started to work differently or fail over the years. I wonder if there is enough upkeep. Using the lazy function or smooth function don't work as well as they used to. I was down to drawing my lines by hand in the app when I wanted them and exporting to SVG to clean up in a program on my PC. I hope this changes for the future.