Love the app, but!

I love this app, it is so COOL!
But i had to redo my iPad (1Gen Max ios 5.1.1, I had to do it as new and not use a backup).
and now i can not get this app back, aka needs ios 7.x or get a old version.

Working on hacking my way around it? As i do have timed backups of the app on my computer.

imark77 about gravity clock, v2.5.1