Pay-Per-Device is great for organizations that have shared devices on the work floor and are looking to use Proceed.app for work instructions, SOPs, and other misc. supports and training.
By not giving employees each their own individual user account, you cannot track individual user activity and/or use the assignment features inside of Proceed.app.
Pay-Per-Device Plans start at $65/device per month with an 8 device minimum. Quantity discounts are available.