Comparison

Chordana Viewer vs StarTone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chordana Viewer

This application analyzes audio files to automatically generate chord charts for your favorite songs. It displays chords in real-time as the music plays and allows for manual editing and instrument pad playback.

Highlights
  • 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
Read full description

[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.

About

StarTone

This music player allows you to rate songs with stars and love statuses directly from your device's library or audio files. It offers convenient rating options via widgets and Apple Watch, with iCloud sync for your ratings.

Highlights
  • Rate music with stars and love statuses
  • iCloud sync for ratings across devices
  • Rating support on Today Extension and Apple Watch
  • Play and rate common audio formats including Flac and MIDI
  • Embed lyrics and support for .lrc files
  • Smart playlist creation
Features
Read full description

StarTone is a music player which can play songs in your "Music" library and audio files stored in your device, including common format like mp3 and lossless format of Flac, also it support MIDI playback and support customize sound bank. StarTone was came out for rating music with stars and "love" statues. The rating bar stands out in the main page, so it just need one touch to make the rating, no need to open many submenus. In addition,  StarTone provides Today Extension and Watch app, so you can also make music ratings on the Widget Screen and your Apple Watch. StarTone now also equips some handy features to make the music listening easy and happy. Please try to play with them. Features:  1. Quickly set star and love ratings for music on your local library, Apple Music or audio file. 2. Sync music ratings with other devices or iTunes via iCloud on the go. 3. With iCloud Sync enabled, love / dislike rating are available. 4. Support rating on today extension (widget). 5. Share music ratings with family and friends. 6. Support embed lyrics, .lrc lyrics file and online lyrics. 7. Support automatically play when launch the app. 8. Support star music rating on Apple Watch. 9. Play and rate audio files of general format and Flac lossless format. 10. Support MIDI playback. 11. Smart playlist for both Music Library and audio files. 12. Play audio files on Apple Watch. 13. Scheduled music playback.

Screenshots

Chordana Viewer4 screens
StarTone4 screens

Verdict

The call

The clearest difference is rating: StarTone at 4.1 against Chordana Viewer's 1.3. StarTone also leads on review sentiment (67% vs 25%) and in-app purchases (none vs 10). Chordana Viewer's advantage is iOS requirement (11.0 vs 18.0). On update cadence, ads, monetization model and device support 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

CostPrice · In-app purchases · Ads · Monetization

Chordana Viewer costs $3.99 and StarTone $0.99 up front. Chordana Viewer sells 10 one-off in-app purchases. StarTone asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

StarTone holds the better App Store score, 4.1 against 1.3. That said, the two scores are not equally well evidenced: StarTone has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 25% of Chordana Viewer's written reviews are positive against 67% of StarTone's.

UpkeepUpdate frequency

Chordana Viewer ships an update every 2 months, StarTone every 5 weeks. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.

Scorecard6 real differences · 4 level
Chordana Viewer versus StarTone: the parameters behind the verdict, then further details
ParameterChordana ViewerStarTone
Price$3.99$0.99 — better
Rating1.3 (3 ratings)4.1 (16 ratings) — better
Positive reviews25.0% of reviews66.7% of reviews — better
Number of ratings316 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS11.0 — better18.0
Further details — not scored
Size461 MB24 MB
Age rating4+4+
DeveloperCASIO COMPUTER CO., LTD.乃波 黄

Customer experience

Chordana Viewer

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews40 reviews
Positive25.0%
Neutral5.0%
Negative70.0%

StarTone

All ratings16 ratings
Positive81.3%
Neutral6.3%
Negative12.5%
Written reviews9 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

10 purchases

Chordana Viewer

One-time10
  • CLEAN GUITAR$0.99
  • VA Synth 1$0.99
  • ROTARY DRAWBAR 1$0.99
Show 7 more
  • XYLOPHONE$0.99
  • VIBRAPHONE$0.99
  • SYNTH STRINGS$0.99
  • SYNTH BRASS$0.99
  • PIANO PAD$0.99
  • STRINGS PIANO$0.99
  • STRINGS$0.99
None

StarTone

No in-app purchases

Questions

Is Chordana Viewer free?
Chordana Viewer costs $3.99, and also offers in-app purchases.
Is StarTone free?
StarTone costs $0.99, with no in-app purchases.
Which has better reviews, Chordana Viewer or StarTone?
StarTone is rated higher. Chordana Viewer averages 1.3 out of 5 from 3 ratings, while StarTone averages 4.1 from 16 ratings.
Do Chordana Viewer or StarTone have ads?
Neither Chordana Viewer nor StarTone shows ads.
Which is updated more often, Chordana Viewer or StarTone?
Chordana Viewer ships an update every 2 months, and StarTone every 5 weeks. Most recently, Chordana Viewer was updated on October 23, 2026 and StarTone on October 18, 2026.

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