While AR requires an iPhone, iPad, or iPod to use directly, you can set up your design on any device. After entering your design’s size, click ‘3D View’ on your computer or ‘AR’ on a mobile device, then use the share feature to send it to someone with a compatible iOS device.

Mobile:

Computer:

From here, you can change the material type of your piece by clicking the drop-down menu

and click 'Show AR Code' to open a code for your design. With this, you can get a real-world view of your design. If you are using Rapid Resizer from your iPhone, you will bypass this stage and go straight to the AR Viewer button shown below.  

Above, you can see Apple's AR View button. It will be located at the top right of your screen once you scan the code with your phone.

Lastly, you will see a prompt to move your phone around, which enables AR to place your design in the space you want to view it.