1Chart vs Luna Display
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1Chart
Create, share, and print professional music charts using the Nashville Number System or letter chords. Offers flexibility in key changes, chord notation, and rhythmic details for efficient music arrangement.
- Nashville Number System support
- Letter chord flexibility
- Key change updates
- Rhythmic notation and dynamics
- Arrangement tools
- PDF and editable file sharing
- Performance mode
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FOR PROFESSIONAL-LOOKING MUSIC CHARTS, 1CHART IS ALL YOU NEED Create, share and print easy-to-read music charts with the only app that gives you all the power of the Nashville Number System, while also offering the flexibility of switching to letter-format chords whenever you like. At the core, 1Chart is built around the Number System and all its shorthand flexibility for charting music. But why stop there? 1Chart is also built for those who prefer to read letter chords rather than number chords. “Am F C” or “6m 4 1”? The choice is yours. Now anyone who prefers letter chords can enjoy the Number System's concise charting advantages — without needing to read numbers. Have a chart using letter chords and want to change keys? No problem. Select a new key, and your letter-format chart is updated to reflect the change. CHART FASTER AND SMARTER - Clear typography makes your charts easier to read - Copy/paste measures or sections for faster charting - View charts in your choice of three font sizes - Share charts and notebooks as PDFs or editable 1Chart files QUICKLY TYPE CHORDS - Support for chord inversions, as well as common and not-so-common chord qualities ("alt" chord, anyone?) - For Numbers fans: Accidentals before or after chord numbers? 1Chart accommodates both preferences. SUPPORT FOR RHYTHMIC NOTATION & DYNAMICS - Add as much rhythm/dynamic detail as you need. 1Chart includes characters for pushes, diamonds, the "mute triangle," etc., as well as the traditional notes and rests used in the Number System. - Use traditional notation or "hash marks" to specify beat distribution in split measures - Mark an area with a crescendo, decrescendo, ritardando or accelerando ADVANCED RHYTHMIC NOTATION - Beam notes above a single chord (e.g. to show an 8th-note feel) or across multiple chords (to show groove or beat distribution) - Tie notes and diamonds TOOLS TO BUILD YOUR ARRANGEMENT - Use repeat symbols, codas, segnos, etc. - Select an area to specify 1st/2nd/etc. endings - Separate sections with a single- or double-underline, or specify no formatting FINE-TUNE YOUR FORMAT - Option to align measures horizontally (4–8 measures per line) - Style inversions with a horizontal or diagonal dividing line - Choose "Minimize Horizontal Spacing" to fit more content per line ORGANIZE AND SHARE YOUR CHARTS - Use Notebooks to gather your charts in easy-to-manage collections (to mirror a set list, for ex.) - Share charts and notebooks by email - Import from and export to cloud services such as iCloud Drive, Dropbox, etc. Imported files must be in 1Chart (.1ch) format. PERFORMANCE MODE - “Lock” your charts to prevent unintended edits - Swipe left/right to access next/previous chart ONLINE SUPPORT & USER FORUM Visit 1chartapp.com for help and to join the user community. ABOUT THE NASHVILLE NUMBER SYSTEM Nashville Numbers is an ingenious shorthand system for charting music that identifies chords by number (relating to scale degree) rather than letter, so charts are key-independent. A Number chart is valid no matter what key you choose to play it in. Take a progression spelled with the chord letters, A, D, and E. In Numbers, these chords are written as “1, 4, 5,” matching their position in the A scale: A is first, D is fourth, and E is fifth. Because scale relationships don't change when you change keys, “1, 4, 5” works in any key. Change the key to G, and “1, 4, 5” indicates you’ll want to play G, C and D — the first, fourth, and fifth notes of the G major scale. Combine this flexibility with rhythmic and dynamic notation, and you’ve got a powerful format for creating concise roadmaps of songs for use when rehearsing or performing. 1Chart includes the option of showing chords in number or letter format, giving you the best of both worlds. You can easily toggle between number chords and letter chords at any time in any chart you create.
Luna Display
Transform your iPad into a wireless second display for your Mac or PC. This hardware-enabled solution offers low latency and high image quality, supporting touch gestures and Apple Pencil for a seamless extension of your computer's capabilities.
- Wireless second display for Mac/PC
- Supports touch and Apple Pencil
- Low latency performance
- Mix and match devices (PC-to-iPad, Mac-to-iPad)
- Headless mode for Mac mini/Pro
- Connect via Wi-Fi or USB
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Turn your iPad into a wireless second display for Mac or PC. Purchase hardware at www.lunadisplay.com — available for USB-C, HDMI, and Mini DisplayPort. MIX AND MATCH DEVICES Luna Display seamlessly extends your computer to another screen. Make the most of your devices with Luna Modes: · PC-to-iPad · Mac-to-iPad · Mac-to-Mac · Headless Mode (for Mac Pro and Mac mini) SETS UP IN SECONDS Simply plug Luna into your computer, launch the Luna apps, and you’re off and running. Hardware is available for purchase at lunadisplay.com. DESIGNED FOR HEAVY-DUTY WORK Luna's hardware ensures compatibility with any desktop app, delivering stunning image quality and low latency performance at 16ms. You get all the reliability of a traditional monitor, with the flexibility of your iPad. CONNECT OVER WIFI OR USB Luna was designed from the very beginning to work wirelessly. Your devices will automatically connect if they’re on the same WiFi network. And if WiFi isn’t available, you can also connect your devices over USB. FULL TOUCH SUPPORT AND GESTURES Luna Display acts as a complete extension to your computer, with full support for: · External keyboards · Apple Pencil · Touch interactions (pinch, pan, zoom, tap) SYSTEM REQUIREMENTS · Primary PC: Microsoft Windows 10 64-bit, Build 1809 or later · Primary Mac: macOS 10.13 (El Capitan) or later · Secondary iPad: iOS 12.1 or later · Secondary Mac: macOS 10.13 (El Capitan) or later FOR ARTISTS: WORKS WITH ASTROPAD Luna fully integrates with our award-winning drawing software Astropad Studio. Luna extends Astropad Studio to create a fully customizable drawing tablet on your iPad. With Luna, your art is no longer limited by the size of your computer display. THE POWER OF OUR LIQUID TECHNOLOGY Using our proprietary LIQUID Technology, Luna Display provides crystal clear image quality, reliable performance, and wireless flexibility. · Uncompromised image quality · Lag-free performance at 60 frames per second · GPU acceleration, so your computer stays fast and optimized · Hand optimized ARM & x86 assembly to maximize battery life · Velocity Control, which analyzes network conditions dozens of times per second PRESS · “Luna’s visual fidelity is frankly stunning” — TechCrunch · “Luna will change your travel workflow” — iMore · “For the first time a wireless solution has impressed us” — Apple Insider GET IN TOUCH · Support: support@astropad.com · Instagram: @astropadco · Twitter: @astropad · Facebook: facebook.com/astropadco
Verdict
The clearest difference is price: Luna Display at Free against 1Chart's $15.99. Luna Display also leads on rating (4.8 vs 4.3) and ratings volume (4K vs 38). 1Chart's advantage is review sentiment (89% vs 76%). On update cadence, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Luna Display is free to download; 1Chart costs $15.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Luna Display holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Luna Display has 4K ratings behind it against 38, so its average is the more settled of the two. Written reviews complicate that: 89% of 1Chart's written reviews are positive against 76% of Luna Display's, so the app with the better star average is not the one people write more warmly about.
1Chart ships an update every 3 months, Luna Display every 2 months. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.
| Parameter | 1Chart | Luna Display |
|---|---|---|
| Price | $15.99 | Free — better |
| Rating | 4.3 (38 ratings) | 4.8 (4K ratings) — better |
| Positive reviews | 89.4% of reviews — better | 76.3% of reviews |
| Number of ratings | 38 | 4K — better |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPad |
| Requires iOS | 14.0 | 13 — better |
| Further details — not scored | ||
| Size | 44 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | RooKanga Digital LLC | Astro HQ |
Customer experience
1Chart
Luna Display
User reviews
1Chart
From 38 App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Fast chart creation
- 💡 Flexible for various musical needs
- ✨ Professional looking charts
- 🔄 Effortless transposing
Room to improve
- 🐛 Alignment issues with slash chords/modifiers
- 🐛 Measure function graphic bug
- 🐛 Chord conversion errors (numbers to letters)
- 🐛 Rhythmic notation editing is cumbersome
- 🐛 Inconsistent support for newer iPad screen sizes
Luna Display
From 4K App Store ratingsWhat we love
- 🚀 Reliable even when Sidecar is not
- 🚀 Absolutely magic in every respect
- 🚀 Headless Mac
- 👍 Great software
- 🚀 Really Cool Way to Use IPad with Windows or Mac
Room to improve
- 🔑 Keyboard Input on screen…
- 🐛 Constantly begging for a rating
- 🔑 Nice product if connected by wire
- 🐛 Cannot right click with pencil
- 🔑 No full screen on iPadOS 18.2 external displays.
Bugs and requests
1Chart
Reported bugs
9 issues- Alignment issues with slash chords, split measures, and repeat signs
- Measure function graphic moves upward, making selection difficult
- Chords sometimes incorrect when switching from numbers to letters
- Rhythmic notation editing requires erasing all rhythms for a chord
- Error in beaming rhythms requires erasing all chords and rewriting
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- Cannot denote beats per chord when also notating a push
- App does not support newer iPad screen sizes
- External keyboard not recognized on iPad
- Voiceover accessibility issues with unlabeled text boxes and buttons
Requested features
30 requests- Draggable sections
- Auto-creation of sections based on existing ones
- Fix chord conversion errors (numbers to letters)
- External keyboard support on iPad
- Handwritten annotation support (Apple Pencil)
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- PDF import
- Metronome
- Color coding for text
- More font size options
- Ability to use multiple font sizes in the same chart
- iCloud sync/backup
- Bluetooth footswitch support
- iPhone version
- Landscape mode option
- Rhythmic notation editing improvements
- Tempo/Style marking clarification
- Ability to denote note value for tempo
- Text box for style markings
- Easier chart sharing/selection
- Calligraphy style font
- Lyrics function with text wrapping
- Option for a blip-light matching tempo
- Roman numeral option
- More intuitive handling of modifiers in slash chords
- Ability to write rhythmic and musical lines over numbers
- Embed audio
- Improve Voiceover accessibility
- Support for newer iPad screen sizes
- Import snippets of tabs/images
- Folders for chart organization
Luna Display
Reported bugs
3 issues- No full screen on iPadOS 18.2 external displays.
- Does not work anymore
- Cannot pair with windows PC
Requested features
4 requests- Portrait mode
- Locked cursor support
- Magic Keyboard Support
- Automatic login in headless mode
In-app purchases
1Chart
No in-app purchases
Luna Display
No in-app purchases









