Hello Keith and and very warm welcome to the Community.
Another old dog to join the pack. 
Woof woof.
Oh boy - that is cool and wonderful.
I’m not quite sure what your concern is.
One of the most valuable ways to improve at playing songs is to play along with songs. Does your app give you that type of immersive experience? Do you ever play along with the actual, original artists’ songs?
What else does your app do that you worry is causing a reliance on it? Does it show the chords on screen one after another after another and you are not learning how to play the songs without its prompting? If yes to that, see this reply I gave recently to a fellow guitarist struggling to remember songs: Trouble Memorizing Songs - #4 by Richard_close2u
Not forgetting tips from @LievenDV here: Tip: Memorizing songs (building layers)
Hope that helps.
Cheers 
| Richard_close2u | Community Moderator, Official Guide, JustinGuitar Approved Teacher