Hi ​@crawforc 

To my knowledge, there is no native way to achieve this.

What you could try
- setup a dedicated mobile rate (non-public)
- link it to a promotion/voucher code
- work with your web agency, to recognize the end device accessing your website
- if a mobile device is recognized, pass the respective voucher code to the IBE.

Passing a voucher code to the IBE:
For Standalone: https://app.mews.com/distributor/aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee?currency=EUR&mewsRoute=rates&mewsRoom=aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee&mewsVoucherCode=SomeVoucherCode
Spec: https://mews-systems.gitbook.io/booking-engine-guide/booking-engine-standalone/deeplinks

For Widget: distributor.setVoucherCode(SomeVoucherCode)
Spec: https://mews-systems.gitbook.io/booking-engine-guide/booking-engine-widget/reference

Best, Marc