If I buy it for one operating system can I use it on another without paying again?

Is it a one time payment or a subscription?

I'm just one person, and I have bills to pay. I'm just one person, and it's selling well enough to support me for the time I spend working on it. It's a specialized tool for one part of the process, and there are other better tools for the other parts. You can't make a whole movie just in this app. RoughAnimator is NOT a full compositing/video editing/audio editing suite. There's no keyframing/tweening, you have to draw every frame yourself. RoughAnimator will NOT do your animation for you. Everything is bitmap images, made out of pixels, so resolution is limited, and scaling/rotating will result in a loss of quality. You won't find fancy simulated paintbrushes in it for instance, just basic freehand drawing/coloring. RoughAnimator is NOT meant to be a design/illustration program.

I've since used it for professional work and so can you! I always wanted an animation program like this, and no one else was making one, so I decided to try myself and developed RoughAnimator in my spare time. Jacob Kafka, a freelance animator in New York. (And it works on desktop computers too.) It can fit into a professional pipeline, to get work done without being stuck at your desk - or you can use it on its own just to doodle and practice your animating skills! As a professional animator myself I'm familiar with the usual complaints about animation software, so I've tried to design the app with those things in mind and make it as intuitive/functional as possible for the needs of animators. Portability and price! RoughAnimator is the most powerful hand drawn animation program in this price range, and the only one specifically designed to be easy to use on a touch-screen tablet without sacrificing professional-level features. What's the advantage of RoughAnimator over other animation software?

Pencil animation wont tablet