Built for the working musician
Every feature in NNS Pro was designed around one question: what does a musician actually need in rehearsal and on stage?
Charting
Full NNS Notation Support
Write charts with the complete Nashville Number System vocabulary: chord qualities (major, minor, diminished, augmented), seventh chords, slash chords, suspended chords, and altered extensions.
Articulation & Dynamics
Add accents, marcato marks, staccato dots, fermatas, crescendos, decrescendos, and dynamic levels (p, mp, mf, f, ff) directly to any chord or measure.
Rhythm Notation
Mark chord durations with whole, half, quarter, eighth, and sixteenth note symbols. Add push/anticipation marks, diamond holds, and cutoff marks.
Repeat & Navigation Symbols
Full support for measure repeats (%), section repeats (||: :||), first/second endings, D.S. al Coda, D.C. al Fine, Segno, and Coda markers.
Transposition
Instant Key Changes
Select any of the 12 keys and watch every chord on every chart instantly re-map. No rewriting required.
Mid-Song Modulations
Insert modulation markers anywhere in a chart. NNS Pro tracks each section’s key center and transposes accordingly.
Enharmonic Intelligence
NNS Pro automatically chooses the most readable enharmonic spelling for each key — no awkward double sharps or double flats.
Performance
Play Mode
Full-screen, touch-friendly chart view designed for live performance. Auto-scroll keeps the current section in view as you play.
Practice Mode with Media
Link YouTube videos and local audio files to any chart. Practice along with the actual recording while following your chart — hands-free and fully synchronized.
Setlist Management
Build setlists from your song library, drag-and-drop to reorder songs, and jump directly to any song without leaving the stage view.
Chart Customization
Full Display Control
Customize section sizing, chord spacing, font colors, and fixed measures per line. Make every chart look exactly the way you want it — no compromises.
Dynamic Font Scaling
Charts automatically resize text to fit your screen. Zoom in or out and the layout adjusts in real time so your charts are always readable.
Custom Annotation Layers
Draw, highlight, and add text notes directly on any chart. Annotations are stored on a dedicated layer and automatically scale when you resize the chart — no manual repositioning needed.
Import & Migration
Import from 1Chart & More
Already have a chart library in another app? Import directly from 1Chart and other popular formats. Get up and running without recreating your entire catalog from scratch.
Bundle Export & Sharing
Export individual songs or entire bundles to share with bandmates or back up your library. Import bundles received from others in a single tap.
Organization
Song Library
Organize all your charts in a searchable library. Tag songs by genre, key, or group for fast retrieval.
Favorites
Star frequently used songs to pin them for fast access across all devices.
Cloud Sync
All charts and setlists are automatically synced via Firebase so they’re always up to date on every device you own.
Ready to start charting?
Read the guide to learn the Nashville Number System, then download the app.