Comparison

Chordology vs Cello Map App

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

Head to head
About

Chordology

Access hundreds of thousands of chord variations for multiple instruments like guitar, piano, and ukulele. Features a minimalist, fast interface and supports iPhone, iPad, and OSX. Enjoy a completely ad-free experience.

Highlights
  • Multi-instrument chord dictionary
  • Hundreds of thousands of chords
  • Thousands of chord variations
  • Guitar, piano, ukulele support
  • Minimalist interface
  • Ad-free
Features
Read full description

Chordology - Chords and Scales, Beautifully Visualized See music. Hear music. Understand music. Chordology is the cleanest, most colorful way to explore chords and scales across all your favorite instruments. Whether you're a beginner learning your first shapes or a seasoned player digging into theory, Chordology turns abstract music concepts into something you can see, hear, and feel. EVERY INSTRUMENT, ONE APP Browse chords and scales for: - Piano - Guitar - Bass Guitar - Banjo - Ukulele BUILT FOR THE WAY YOU ACTUALLY PLAY - Custom tunings (Chordology Pro): set up any tuning on your stringed instruments and see every shape update instantly. - Capo support (Chordology Pro): dial in your capo position and view chords exactly as they'll sound. - Multiple finger positions: for guitar, bass, ukulele, and banjo, swipe through every voicing up and down the neck to find the one that fits. - Hear it instantly: tap play to hear any chord or scale rendered authentically on your chosen instrument. GO DEEPER THAN SHAPES Every chord comes with rich musical insight. Explore qualities like brightness, darkness, and consonance to understand not just how a chord is played, but why it sounds the way it does, and how to use it in your own music. AN INTERFACE AS BEAUTIFUL AS IT IS USEFUL Chordology's signature color system gives every note its own identity, so patterns leap off the fretboard and keyboard. The clean, bright design keeps the music front and center: no clutter, no noise, just clarity. CHORDOLOGY PRO Chordology is free: every instrument, every chord and scale, every voicing, and playback, at standard tuning. Chordology Pro is a one-time purchase - no subscription - that adds alternate tunings, a capo on any fret, and sharing. Pick an instrument. Choose a chord or scale. Press play. Start exploring. Download Chordology and see your music in a whole new light.

About

Cello Map App

This app helps cellists and composers find finger positions for specific harmonics and multiphonics. It provides audio examples, notation, and instructional videos to aid in playing and composing.

Highlights
  • Harmonics and multiphonics exploration
  • Smart search system
  • Audio examples
  • Notation display
  • Instructional videos
  • Advanced settings for microtonality and microphone choice
Features
Read full description

Cello MApp is the partner app to the internationally popular Cello Map webpage. Are you a cellist or composer who is asking: WHERE do I put my finger, and on which string, to produce ‘C-sharp two octaves above middle C’ as a natural harmonic? WHAT is the pitch of the 11th harmonic on the A string? Are there some multiphonics that include the 7th and 11th harmonics on the G string, WHERE do I play them? Is there a multiphonic that includes the notes A-sharp, D, and F, WHAT does it sound like and HOW can I notate it? Cello MApp has the answers! First, choose whether you want to explore cello harmonics or cello multiphonics. Then, use the smart search system to choose your starting point (pitch result, note name, string, left-hand position, harmonic number). Continue to add ‘branches’ to this starting point to filter out options. The filtering system will find a result (or several alternative results) and provide you with notations, audio examples, and videos. Use the ‘branching’ system or build several trees to COMPARE the sound and notation of different options. Need playing or composing TIPS? Check out the instructional videos on the ‘How To’ section of the app. Use the ADVANCED settings to -display the microtonality in terms of cents deviation from the harmonic series, or as accidentals with arrows -choose between recordings made with a closely-placed or an omnidirectional microphone.

Screenshots

Chordology4 screens
Cello Map App4 screens

Verdict

The call

The clearest difference is price: Chordology at Free against Cello Map App's $3.99. Chordology also leads on rating (4.4 vs 3.7) and update cadence (every 3 days vs every 3 months). Cello Map App's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 26.0). On review sentiment, ads 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

Chordology is free to download; Cello Map App costs $3.99 up front. Chordology sells 1 one-off in-app purchase. Cello Map App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chordology holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: Chordology has 231 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 66% and 67% positive.

UpkeepUpdate frequency

Chordology ships an update every 3 days, Cello Map App every 3 months. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

Scorecard7 real differences · 3 level
Chordology versus Cello Map App: the parameters behind the verdict, then further details
ParameterChordologyCello Map App
PriceFree — better$3.99
Rating4.4 (231 ratings) — better3.7 (3 ratings)
Positive reviews65.8% of reviews66.7% of reviews — better
Number of ratings231 — better3
Update frequencyEvery 3 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.015.6 — better
Further details — not scored
Size142 MB170 MB
Age rating4+4+
DeveloperGreg RaineEllen Fallowfield

Customer experience

Chordology

All ratings231 ratings
Positive83.1%
Neutral7.8%
Negative9.1%
Written reviews38 reviews
Positive65.8%
Neutral10.5%
Negative23.7%

Cello Map App

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

Chordology

Reported bugs

12 issues
  • Voicing displayed doesn't match played voicing
  • Played chord is an octave higher than displayed
  • Shows minor chords as major and vice-versa
  • iPad version is a stretched iPhone UI
  • Options screen is non-functional
Show 7 more
  • App crashes immediately
  • Swiping on iPad to see different chord variations doesn't work
  • Tapping on left/right of dots to see variations is bizarre UI
  • iPad version only shows first chord variation
  • Fret changer swiping doesn't slide display
  • Constant rating requests
  • Common ways to play chords are deeper in options

Requested features

16 requests
  • Ability to hear chords as displayed
  • Toggle between numbers and note names
  • Color scheme customization
  • Add five-string banjo
  • Add baritone ukulele
Show 11 more
  • Display chord notes
  • Display note scale degrees
  • MIDI chord detection
  • Ability to store a series of chords
  • Change tuning options
  • Add capo position
  • Audio previews for chords
  • Scales for stringed instruments
  • Support split screen mode
  • Center interface and allow 180-degree rotation
  • More tunings for banjo

Cello Map App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Chordology

One-time1
  • Chordology Pro$5.99
None

Cello Map App

No in-app purchases

Questions

Is Chordology free?
Chordology is free to download, with in-app purchases available.
Is Cello Map App free?
Cello Map App costs $3.99, with no in-app purchases.
Which has better reviews, Chordology or Cello Map App?
Chordology is rated higher. Chordology averages 4.4 out of 5 from 231 ratings, while Cello Map App averages 3.7 from 3 ratings.
Do Chordology or Cello Map App have ads?
Neither Chordology nor Cello Map App shows ads.
Which is updated more often, Chordology or Cello Map App?
Chordology ships an update every 3 days, and Cello Map App every 3 months. Most recently, Chordology was updated on October 15, 2026 and Cello Map App on October 8, 2026.

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