The Brid player will has capabilities to autoplay your pre roll in-page on all mobile devices including iPhones.
Do keep in mind that your ad tags must be VAST/VPAID compatible and only these will work.
This option is available for all Brid users but there are limitations for FREE plan users:
- Mobile VAST/VPAID autoplay will work only on the latest iOS 10 version. On any iOS version below 10, autoplay will not work.
- For Android operating systems, mobile VAST/VPAID autoplay will only work on Chrome on version 53+.
For users on any of Brid paid plans, these limitations do not apply and VAST/VPAID mobile autoplay will work on all operating systems and mobile devices.
The only limitation for mobile VAST/VPAID autoplay is that your ad content will start muted. Sound must always be user initiated.
Google entry regarding mute - https://developers.google.com/web/updates/2016/07/autoplay
For better understanding on how autoplay is supported on mobile devices depending on the browser here is a list with better explanations - Autoplay table support