Can I design on my phone?

Yes. With Motocal you can create a kit on your phone, but you cannot edit your design on a phone. You can however save it for later by phone - https://www.motocal.com/help/how-to-save-share-your-design-on-motocal

You can fully edit your design from a tablet or computer. We fully recommend you design on one of these devices. You will be able to add text, logos, numbers or change colours, shapes and styles. You will unlock the full creative tools of Motocal on a tablet, laptop or desktop.

You can read more about the differences in laptop vs. cell phone on our blog: https://www.motocal.com/us/blog/motocal-decals-cell-phone-versus-desktop