Also, as has been pointed out before, MyFlightBook is a very capable app. And free (though you should contribute).
I understand the inclination to want it to be in iFly, since it's collecting flight data anyway, and who wants to have more apps than necessary? But MyFlightBook can automatically keep track of origination/intermediate/destination points, and flight time -- which is probably a couple of the main reasons you want a logbook in iFly. Besides doing that though, it has a large feature set that I'm sure iFly would not want to duplicate. Things like keeping track or your pilot currencies (flight review, medical, passenger carrying [day & night]), and aircraft currencies (annual, transponder, etc.). Plus, you can search and total your log entries a bunch of different ways. And print out your entries, if required or so inclined, in various logbook formats.
There's something to be said for an app that specializes in one thing.