That's an iPAD
app, are you sure it will work with an iPHONE?
There are quite a few ONLINE HF/SSB radios that can be controlled and set to the frequencies you want to listen to.
Simply follow the internet radio's 'how to tune' and listen ... and set your iPhone near the computer speaker (best to use an amplified PC speaker). Your computer connected to one of these 'online' and controllable radio's will then 'substitute' as an HF/SSB radio.
Here's an example of one based in Virgina: http://www.chilton.com/scripts/radio/R8-receiver
Others (but choose the right frequency range and best/close location): The Listening Post - Links to Other Radios
Here's your NOAA WeFax schedules. Use Boston @ 9.110 MHz in AM
Most WeFAX is broadcast on AM
mode, not LowerSideBand or UpperSideBand modes, so set the internet radio's controls to AM for proper connection.
If using an internet controlled radio via your PC choose/select an internet based receiver that is 'fairly close' (~500 mi) to the broadcast station
General NOAA listing for broadcast marine weather, etc. : National Weather Service Marine Forecasts