1Chart for creating charts in Nashville Numbering System

I'm interested in feedback on this iOS product:

1Chart – Create & Share Nashville Number Charts on the App Store

Vendor website is 1Chart

I'm especially keen to learn if there is a decent archive of country/outlaw/honky tonk/classic country in this format. Just getting involved in a country project and there's 60 songs to learn w/more on the way. Mainly interested in the progressions, stops, etc.

Thank you!
 
Seems kindof pricey. I don't use NNS but do chart out songs as RTF files that fit the iPad screen and just use DropBox (free) to display them. One could do it in NNS the same I think? An example:

What Was I Thinkin' - Dierks Bentley (F)
|x|x|
Intro: |F|Db|Eb|Bb|
Verse(Intro) Verse |C|C CCx|
Chorus: |F Bb| x4 |C|Eb' Bb-|
Intro Verse Verse |C|C CCx| Chorus |F|
Solo: |G|Bb F|G|Db Eb|F|F|
Verse Verse |Ab|Db|C|C Cx|
Chorus: |F Bb| x4 |C|C|Eb' Bb-|
Intro Verse Verse(fade)
 
I write out the notes as I am learning new stuff. Even the Young Country tunes we do. Once I have them memorized, I never view my notes again. I utilize the numbering system when explaining to others, seems to work for those moments.

BEST THING however is when a song comes on the radio after I've 'learned' it. That's where I listen and refine my version to as closely resemble the original.
 
Forgot I have iReal Pro on my iPad. Since that allows for instant transposition (and since it appears I'll be creating many charts on my own!), I think I'll stick with the app I know and use that. There are some country songs available in this format but this appears to be a DIY project. And I bet there's a ton of songs lurking out there on session players' iPads! :D
 
I discovered that iReal Pro lets you switch back and forth between standard chords and Nashville Numbering with one click. Also lets you switch keys. And it plays back chord progressions, letting you boost or lower volume or remove virtual instruments. What it doesn't do is chart "little rhythmic notes."
Yes, iReal is a great app for practicing and communicating jazz charts.