How to get and install iReal b 4.4 for first generation iPod Touch?

[serhart]

I bought iReal b for my macbook and for my ipad mini, and for convenience sake, would love to have it on my old iPod Touch first gen. No more dollars this year for updating that piece of hardware, but its size would be a bonus for certain gigs and rehearsal.

The last version that works appears to be version 4.4. Anyone know how to get that version of the app, and install it? I'm not opposed to jailbreaking if necessary, but if anyone has quick advice, I'd appreciate it. Thx.