@David27
For your information, the print servers, their application scenarios and platforms, are based on traditional desktop operating systems (windows, MAC, Linux and so on)
The compatibilities about these systems are very clear on our website.
We don’t encourage you customers to use our print servers with mobile devices, we don’t guarantee they work properly with mobile devices.
However, considering you have such requirement, you can download the two APPs here to print: ePrint and PrintHand, while we don’t guarantee their compatibility.
These two APPs are paid APPs. ePirnt is applied to Android and IOS systems and the printing protocols are LPR and RAW.
PrintHand is applied to Android, IOS and windows Phone and the printing protocol is LRP.
May it help and have a nice day.