# 1Chart — Smarter Music Charts > Music charting app using Nashville Number System and letter chords. (iPhone/iPad app by RooKanga Digital LLC.) - Source: https://appshunter.io/ios/app/1chart/id916272960 (this page in markdown: same URL + `.md`) - Developer: [RooKanga Digital LLC](https://appshunter.io/developer/916272959) - Category: Productivity, Music - Price: $15.99 - Rating: 4.30/5 from 33 App Store ratings · 47 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 44 MB - Languages: English - Released: 2015-01-11 - Data updated: 2026-08-11 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/1chart/id916272960/reviews.md ## What is 1Chart? 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. ## Key features - Nashville Number System support - Letter chord flexibility - Key change updates - Rhythmic notation and dynamics - Arrangement tools - PDF and editable file sharing - Performance mode ## Recent user reviews (10 of 47) All indexed reviews: https://appshunter.io/ios/app/1chart/id916272960/reviews.md ### 4/5 — Please work on draggable sections *2026-05-17, version 2.3* Really great app! The potential is massive. I’d recommend it 100%. I would say though, if those sections were draggable, that would be fire. Imagine having a side panel to where instead of copying and pasting, you can either move by dragging, or even create new sections based on the sections you’ve already created (basically the app remembers that in this song, intro means this progression, and when I type intro, it will add that). Just some functionality stuff, I found myself struggling to move stuff around when in high stake situations. But it’s a really amazing app! ### 4/5 — My preferred charting app, but *2026-04-09, version 2.3* This is the best Nashville number-style charting app I’ve found so far, but I recently found that sometimes the chords are incorrect when I switch a chart from numbers to letters. For example, the 6m in the key of A-flat minor is E-minor/F-flat minor, but the app thinks it is F-minor even when I correctly set the key. If I hand my chart to someone who doesn’t read numbers, this could be an issue onstage. I’d love to see this fixed, but otherwise I’m enjoying the app. ### 4/5 — Typing keyboard on iPad *2025-08-02, version 2.3* Hello, love the app. I used to use your old Nashville Fonts in the day. Question, how do I get the app to see my attached keyboard? When I try to type the numbers, nothing happens. Thanks ### 5/5 — I love this app…….BUT (please listen developers) *2024-12-31, version 2.3* This app has cut my preparation time down by 60-80 percent for fill in gigs. ONE ISSUE, I want to share my entire charts on both of my iPads (one being a backup) but this is not possible. Unless you want to do it 1 at a time. This would make the app perfect ### 4/5 — Great app! But… *2024-09-20, version 2.3* I’ve found this app to be very useful when it comes to making and keeping charts. The only issue I have is that there’s no hand-written annotation support. I’m a drummer, and having my charts annotated is a must when I play with people. I really would like to make my charts, annotate them, and read them while playing, all within the same app. It’s very unfortunate that my only options are either to print them out and annotate the paper, or export them and annotate the PDFs. It would be so useful to do everything all together. Other than that, this app has served me very well! ### 4/5 — Good but page sizing needs work *2024-02-19, version 2.3* Quick and easy to make charts but there is only 3 text sizes and the larger fonts leave a lot of blank space and a force unnecessary page breaks. ### 5/5 — Pretty good App *2023-12-30, version 2.3* It would be great to add a metronome to this App and be able to color code any text including verse/chorus/bridge / notation, etc Adding the above would make it a much better and complete App Thanks ### 4/5 — Awesome! Wish it had a few things though *2023-08-19, version 2.3* I absolutely love this app and it has made charting and organizing my charts a breeze. However, I would love to see the following in a future update: 1). Apple Pencil support. It would be awesome to be able to write on my charts directly in the app. The only way to do this is to export my chart as a PDF and save it elsewhere. I prefer keeping my charts within the app since the notebooks feature is super handy. 2). The ability to import PDFs. I like to add snippets of tabs over some of my charts. Since the app doesn’t allow me to add a screenshot of anything to my charts, it would at least be nice for me to do it in another app and then import that new pdf back into the app for the sake of organization. ### 5/5 — Great performance app *2023-05-20, version 2.2.1* Love that you can switch to letters or numbers and transpose easily. Changing keys can be noted in comments but to use a number system you need to input changes relating to original key. ### 4/5 — Font variables *2023-04-21, version 2.2.0* I have hundreds of charts in 1CHART Is it possible to have / use more than 1 FONT size in the same chart ? Adding small notations to large chords could be very helpfulChip ## Frequently asked questions about 1Chart ### What is the Nashville Number System in 1Chart? The Nashville Number System is a shorthand for charting music where chords are identified by numbers corresponding to scale degrees, rather than letters. 1Chart fully supports this system, offering its concise charting advantages. ### Can I use letter chords in 1Chart? Yes, 1Chart offers the flexibility to switch to letter-format chords (e.g., 'Am F C') if you prefer them over number chords. This allows users to benefit from the Number System's conciseness without needing to read numbers. ### How does 1Chart help with changing keys? If you have a chart using letter chords, 1Chart makes it easy to change keys. Simply select a new key, and your letter-format chart will automatically update to reflect the new key. ### What kind of rhythmic notation does 1Chart support? 1Chart supports detailed rhythmic notation and dynamics, including characters for pushes, diamonds, mute triangles, and traditional notes and rests. You can also specify beat distribution in split measures and mark areas with tempo changes. ### How can I share my charts from 1Chart? You can share your charts and notebooks as PDFs for easy viewing or as editable 1Chart files for collaboration. Sharing can be done via email or through cloud services like iCloud Drive and Dropbox. ### Does 1Chart have a performance mode? Yes, 1Chart includes a performance mode that locks your charts to prevent accidental edits. This mode also allows you to easily swipe left or right to access the next or previous chart during a performance. ### What devices does 1Chart support? 1Chart is currently supported on iPads. It was released on January 11, 2015, and its latest version is 2.3, last updated on August 14, 2023. ### What is the price of 1Chart? 1Chart is a paid application priced at $15.99. It does not have in-app purchases or advertisements. ## Version history (last 5 releases) ### 2.3 — 2023-08-14 - When adding charts to a notebook, a new “Select All Charts” button makes it easier to create an exportable notebook containing all your charts. - A notebook exported in 1Chart Notebook format (.1nb) now retains custom-sort info. - Fixed a bug that could momentarily interfere with display of the header key after exiting Performance Mode. ### 2.2.1 — 2023-04-28 Improved error message handling for rare cases involving notebook imports. ### 2.2.0 — 2022-10-22 Updates for improved performance. ### 2.1.9 — 2022-08-17 Fixed a bug that, in certain cases related to use of Performance Mode, could cause charts not to save correctly. ### 2.1.7 — 2020-01-13 Bug fixes and performance improvements (to make charting easier than ever!). ## Apps similar to 1Chart | App | Rating | Price | Category | | --- | --- | --- | --- | | [TouchMix-30 Control](https://appshunter.io/ios/app/touchmix-30-control/id1080754304) | 3.2 (52) | Free | Productivity | | [MetaGrid Pro](https://appshunter.io/ios/app/metagrid-pro/id1579217556) | 4.0 (26) | Free | Productivity | | [Artist Growth](https://appshunter.io/ios/app/artist-growth/id1630210606) | 3.6 (7) | Free | Productivity | | [Vidami for Safari - iOS](https://appshunter.io/ios/app/vidami-for-safari-ios/id1589070496) | 3.5 (19) | Free | Productivity | | [Master Tour Mobile](https://appshunter.io/ios/app/master-tour-mobile/id347364187) | 4.8 (3,406) | Free | Productivity | | [Sibelius KeyPad](https://appshunter.io/ios/app/sibelius-keypad/id1078098572) | 4.6 (142) | Free | Productivity | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-11.*