I’m looking for tools that can help creating low-fidelity, prototypes (that a client absolutely cannot mix up with a design composition and start discussion stylistics) for apps and websites. I’m fine with either a web, mac or an iPad app. Also I’m open to it either create a hand-drawn style programmatically or straight up make use of the Apple Pencil, but provide some methods above only painting (i.e. detecting shapes and creating reusable components. Any idea besides Balsamiq is welcome.