Comparison

Chord NOTE vs Post

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

Head to head
About

Chord NOTE

This app helps songwriters find chords that match melodies and provides tools for creating chord progressions. It also includes a scale library and can display vocal pitch to aid in composition.

Highlights
  • Chord finding for melodies
  • Chord Progression function
  • Scale library
  • Vocal pitch display
  • Key finding
  • iPad Split View/Slide Over support
Read full description

Chord NOTE is a Songwriter’s assistant tool. It assists in finding the right chords to match a melody or musical phrase. And it has great Chord Progression function and Scale library. Chord NOTE supports Slide Over and Split View on iPad, and provides the appropriate display and operation for iPhone and iPad. You wrote new melody came into your mind, but you could not apply some chords for your melody… At a time like this, you can get guides to find some chords that match your melody by Chord NOTE. If you have composed some songs already, you know almost melody and chord have some same notes. Because the main part of melody is made up of constituent notes of chord in most cases. In the same way, you’ll be able to find Key to match your melody by Chord NOTE. So Chord NOTE is very useful for finding the chord and key. If you record your singing melody, you can display the pitch of your voice. And you can sketch your songs by Chord Progression function. Chord Progression function will provide numerous features for you. Chord NOTE supports widening the imagination of your wings for real composer. Advanced Option : Chord NOTE works fine without this option. However, when you’ll buy this low price add-on, you can use more Chords and Scales. It will provide a complete set usually. You can read full function description at support page. http://therootage.com/iphone/chord-note-en/

About

Post

This app provides tools for analyzing post-tonal music, including pitch-class set and tone row calculations. It helps users identify Forte names, normal forms, prime forms, and relationships within musical sets.

Highlights
  • PC Set Calculator
  • Subset/Superset Calculator
  • Matrix Calculator
  • Forte name analysis
  • Normal form calculation
  • Prime form identification
  • Tone row analysis
Features
Currently charting
Read full description

The Post-Tonal Tool Kit is designed to be a one-stop app for pitch-class and tone row analysis of post-tonal music. Features include a PC Set Calculator, a Subset/Superset Calculator, and a Matrix Calculator. –This app is perfect for the music theory student analyzing post-tonal music. –This app is also designed for the classroom and pedagogical uses. * With an Apple Dock Connector the screen can be projected in the classroom. * Analytical assignments can be designed to incorporate the features of the app that highlight relationships within sets and rows. The PC Set Calculator analyzes sets ranging from three to twelve pitches and provides: * Forte name * Normal form * Prime form * IC Vector * Z-Mate * Tn Invariance * TnI Invariance The calculator also will provide the inversion and complement sets with all the above information and all sets can be analyzed for subset and superset relationships (a very handy tool when analyzing Webern!). **WHAT’S NEW!!!** The Matrix Calculator will generate a matrix with any number of pitches up to twelve. The rows are numbered using the Straus/Roig-Francoli system (Introduction to Post-Tonal Theory/ Understanding Post-Tonal Music), where the P and I row labels correspond to the starting pitch class. Any number of pitch classes within the matrix can be highlighted and the selected set then sent back into the PC Set Calculator. This feature is extremely helpful when comparing trichords, tetrachords, and hexachords!

Screenshots

Chord NOTE4 screens
Post4 screens

Verdict

The call

The clearest difference is rating: Post at 4.3 against Chord NOTE's 3.0. Post also leads on in-app purchases (none vs 1) and chart position (#196 vs unranked). Chord NOTE's advantage is review sentiment (62% vs 50%) and price ($2.99 vs $4.99). On ratings volume, update cadence, 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

Chord NOTE costs $2.99 and Post $4.99 up front. Chord NOTE sells 1 one-off in-app purchase. Post asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Post holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews complicate that: 62% of Chord NOTE's written reviews are positive against 50% of Post's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 7, 2026 and August 9, 2026 respectively.

Scorecard7 real differences · 4 level
Chord NOTE versus Post: the parameters behind the verdict, then further details
ParameterChord NOTEPost
Price$2.99 — better$4.99
Rating3.0 (3 ratings)4.3 (6 ratings) — better
Positive reviews61.5% of reviews — better50.0% of reviews
Number of ratings36 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#196 — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.110.0 — better
Further details — not scored
Size31 MB1 MB
Age rating4+4+
DeveloperHidenori MatsuokaA Squared Applications

Customer experience

Chord NOTE

All ratings3 ratings
Positive33.3%
Neutral33.3%
Negative33.3%
Written reviews13 reviews
Positive61.5%
Neutral23.1%
Negative15.4%

Post

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

1 purchases

Chord NOTE

One-time1
  • Advanced Option$1.99
None

Post

No in-app purchases

Questions

Is Chord NOTE free?
Chord NOTE costs $2.99, and also offers in-app purchases.
Is Post free?
Post costs $4.99, with no in-app purchases.
Which has better reviews, Chord NOTE or Post?
Post is rated higher. Chord NOTE averages 3.0 out of 5 from 3 ratings, while Post averages 4.3 from 6 ratings.
Do Chord NOTE or Post have ads?
Neither Chord NOTE nor Post shows ads.
Which is updated more often, Chord NOTE or Post?
Chord NOTE ships an update every 2 months, and Post every 2 months. Most recently, Chord NOTE was updated on September 7, 2026 and Post on August 9, 2026.

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