I highly doubt that these iRig products will be satisfactory, if they work at all.
Basically, forget the DIN midi ports - that kind of midi is simply too slow for STROM, since there is a lot of sysex traffic.
Other midi interfaces which have USB, such as the iconnectivity ones, also don't seem to work - they fail at transmitting larger sysex messages.
The best wired connection is direct USB with the camera connection kit.
If you want to also connect a audio interface, you can use a USB hub - you need one which has a power supply.
You can also use Strom wirelessly, using my other app SDS Drop running on Mac as the connection relay to your Rytm: http://www.elektronauts.com/t/strom-and-sds-drop-sitting-in-a-tree/33103