# Chordana Viewer > Music app that analyzes audio to create and edit chord charts. (iPhone/iPad app by CASIO COMPUTER CO., LTD..) - Source: https://appshunter.io/ios/app/chordana-viewer/id711042441 (this page in markdown: same URL + `.md`) - Developer: [CASIO COMPUTER CO., LTD.](https://appshunter.io/developer/456569836) - Category: Music, Utilities - Price: $3.99 with in-app purchases (on sale, was $7.99) - Rating: 1.30/5 from 3 App Store ratings · 19 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 461 MB - Languages: American English, Japanese - Released: 2013-10-31 - Data updated: 2026-08-27 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/chordana-viewer/id711042441/reviews.md ## What is Chordana Viewer? [Compatible devices] iPhone6 or later(Except for the iPhone SE), iPad Pro, iPad(5th generation or later), iPad Air or later, iPad mini(4th generation or later) [System requirements] iOS 11.0 or later required. ＊Important＊ ・To use iTunes in the Cloud songs (songs purchased or played through the iTunes Match service), first download the songs to a terminal. ・The names of iTunes in the Cloud songs that have not been downloaded to a terminal are shown on the song list, regardless of terminal settings. ・Songs protected by DRM cannot be used even if downloaded. ＝Support for writing the chord chart for your favorite songs＝ ○ Product Features ○ An application that analyzes the tones played in an audio file and helps you write the chord chart. Audio files in your iPad or iPhone are analyzed by the original Casio Chordana technology, and the sounds played in each song are displayed on the screen as chord chart. At the same time, the chord positions for the instrument are displayed as the song plays. You can also play the results of the chord analysis on the instrument pad to check the outcomes. You can then edit the chords yourself as you listen to the actual sounds and write even more accurate chord chart. This is so much quicker and easier than trying to figure out the chords just by listening to them. As well as being able to save analyzed or edited chords, you can also exchange them via email with other Chordana Viewer users or print them out on an AirPrint-compatible printer. * The analyzed chords will be a close match to the mood of the song, but may not necessarily be the same chords as those used in the original. ＜Displaying chords matched to the song[Chord display pane]＞ As well as showing the analyzed chords, the app has a guide bar that moves along with song playback, allowing you to check the chords being played in real time. The app also supports full-screen display so that you can just check the chord chart. 『Chord Guide』 By touching a chord in the chord display pane, you can check the chord position for the instrument selected in the Performance pane. 『Editing Chords』 You can modify the chord chart by choosing a chord from up to three candidate chords that are closest in sound to the analyzed chord. You can also specify the chord manually. You can also adjust barline position. ＜Tapping a performance by watching the chord positions[Performance pane]＞ Navigate in the screen using the piano or guitar finger positions to match the chord display. Of course, you can also use the chord list to check the position display for chords that are not shown. To play the chords, select the piano pad or guitar pad. To play individual notes, select them on piano keyboard. You can also use the recording function to record your performances. * You can also purchase additional instruments and types of tones as add-ons. ＜Customize your own tempo, key and vocal balance＞ By using the app to import an audio file into your iPad or iPhone, you can modify the tempo or key of the song. You can also adjust the balance between vocals and accompaniment, which is useful for transcription. If you change the key, the chords in the chord display pane are also converted automatically, so transposition is simple. ＜The Technology Behind Chordana＞ The Chordana series apps use original Casio technology to analyze audio files. The apps achieve unprecedented success in extracting natural chords from the time changes and the distribution of frequency components included in audio waveforms, while also taking into account the characteristics of the harmonies, melodies and rhythm instruments included in the song. ## Key features - Automatic chord chart generation - Real-time chord display - Chord editing and manual input - Instrument pad playback - Tempo, key, and vocal balance customization - Email sharing and AirPrint compatibility ## Pricing and in-app purchases Base price: $3.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | CLEAN GUITAR | $0.99 | one-time | | VA Synth 1 | $0.99 | one-time | | ROTARY DRAWBAR 1 | $0.99 | one-time | | XYLOPHONE | $0.99 | one-time | | VIBRAPHONE | $0.99 | one-time | | SYNTH STRINGS | $0.99 | one-time | | SYNTH BRASS | $0.99 | one-time | | PIANO PAD | $0.99 | one-time | | STRINGS PIANO | $0.99 | one-time | | STRINGS | $0.99 | one-time | ## Recent user reviews (10 of 19) All indexed reviews: https://appshunter.io/ios/app/chordana-viewer/id711042441/reviews.md ### 1/5 — Can I get refund? *2026-05-31* This app doesn’t allow you to import your mp3. It’s broken. ### 5/5 — Very cool *2024-09-07, version 2.1.10* Thanks for great stuff✌️ ### 1/5 — Doesn’t do any analysis *2021-04-23, version 2.1.9* It just dorsn’t work. Prints “error”. Russian song «Вижу», artist «Магелланово облако» ### 2/5 — FILES support needed *2020-06-04* Please add apple FILES support ### 5/5 — Great update *2020-06-03* I’m so happy. The latest update has put it back to brilliance 😁 all perfect again 👍🏻👍🏻😁😁👍🏻👍🏻 ### 1/5 — Doesn't work *2015-11-02* Dear Casio: I recently paid for and downloaded the Chordana App. I would like a refund. This app does not work and was very expensive. It won't analyze any songs I have- the songs are downloaded and are DRM free and I'm using the correct operating system. I read your instructions thoroughly and the app still doesn't work on ANY song. I am very disappointed as I trusted the Casio brand. ### 1/5 — Useless for iTunes Songs *2014-09-27* Just purchased this app and I get an error message "cannot be used" for EVERY one of my downloaded iTunes songs that I select. Fix this or refund my money!!! ### 3/5 — Needs work *2014-08-16* The software itself is kind of magical. The ability to analyze music and discern chords and melody and create a chart is impressive. But the interface isn’t very intuitive, and there seem to be some fundamental issues. On my iPhone, Chordana recognized my iTunes songs and translated them. On my iPad, it wouldn’t work with any of my content and returned an error. Support seems to be nonexistent so I have no idea how to fix it. ### 4/5 — Much Better *2014-08-08* With the latest update you can now export the charts that Chordana creates. The chord detection is pretty remarkable technology and although it is not 100% accurate it is enough to help you out get you in the ballpark. Now you can take the chart, email it to yourself or print it out. ### 1/5 — Crashes! *2014-02-16* This app simply does not work! If you choose a song from your iTunes library it crashes. How could this still be available for purchase when it STILL has these issues?! ## Frequently asked questions about Chordana Viewer ### What devices is Chordana Viewer compatible with? Chordana Viewer is compatible with iPhone 6 or later (excluding iPhone SE), iPad Pro, iPad (5th generation or later), iPad Air or later, and iPad mini (4th generation or later). It requires iOS 11.0 or later. ### How accurate are the analyzed chords in Chordana Viewer? The analyzed chords aim to closely match the mood of the song. However, they may not always be identical to the original chords used in the song. Users can manually edit chords for greater accuracy. ### Can I use songs from iTunes in the Cloud with Chordana Viewer? Yes, you can use iTunes in the Cloud songs, but you must download them to your device first. Songs protected by DRM cannot be used, even if downloaded. ### Does Chordana Viewer have ads? No, Chordana Viewer does not contain advertisements. It is a paid application. ### What is the price of Chordana Viewer? Chordana Viewer is available for a one-time purchase of $3.99. ### Can I purchase additional instruments or tones for Chordana Viewer? Yes, you can purchase additional instruments and types of tones as add-ons within the application to expand its functionality. ### How frequently is Chordana Viewer updated? The latest version, 2.1.10, was released on September 4, 2024. Updates are released periodically to improve performance and add features. ### What is the user sentiment for Chordana Viewer based on ratings? Chordana Viewer has a low rating of 1.5 stars from 2 ratings, indicating a generally negative user sentiment based on the available data. ## Version history (last 5 releases) ### 2.1.10 — 2024-09-04 ・Bug fixes and performance improvements ### 2.1.9 — 2020-06-02 - In versions 2.1.7 and 2.1.8, some songs did not properly analyze the chords, but this has been fixed. - Fixed some other bugs. ### 2.1.8 — 2020-03-25 - Fixed some bugs. ### 2.1.7 — 2020-02-28 - For iOS 13, fixed a crash when importing from the music(iPod) library. - Compatible with iPhone6(Except for the iPhone SE) and later screen sizes. - Fixed some bugs. ### 2.1.6 — 2017-03-13 Information was added to the overview. "Chordana Play English version Release Anniversary Sale" ## Apps similar to Chordana Viewer | App | Rating | Price | Category | | --- | --- | --- | --- | | [StarTone](https://appshunter.io/ios/app/startone/id1216107501) | 4.1 (15) | $0.99 | Music | | [bismark m16](https://appshunter.io/ios/app/bismark-m16/id1293998203) | 3.5 (4) | $3.99 | Music | | [Chord Memory Board](https://appshunter.io/ios/app/chord-memory-board/id6756252908) | — | $1.99 | Music | | [Balalaika Tuner Pro](https://appshunter.io/ios/app/balalaika-tuner-pro/id879725882) | 1.0 (2) | $14.99 | Music | | [iAutoharp](https://appshunter.io/ios/app/iautoharp/id304091719) | 2.7 (3) | $1.99 | Music | | [VoicingWorkout](https://appshunter.io/ios/app/voicingworkout/id6748817790) | — | Free | Music | ## More apps by CASIO COMPUTER CO., LTD. - [EXILIM Remote](https://appshunter.io/ios/app/exilim-remote/id640856022) - [Chordana Tap](https://appshunter.io/ios/app/chordana-tap/id675014142) - [CASIO WATCH+](https://appshunter.io/ios/app/casio-watch-plus/id760165998) - [EXILIM Link](https://appshunter.io/ios/app/exilim-link/id904148679) - [C-Assist](https://appshunter.io/ios/app/c-assist/id906611059) All apps by CASIO COMPUTER CO., LTD.: https://appshunter.io/developer/456569836 --- *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 2026-08-27.*