Chord NOTE vs MelodySlotMachine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Chord finding for melodies
- Chord Progression function
- Scale library
- Vocal pitch display
- Key finding
- iPad Split View/Slide Over support
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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/
MelodySlotMachine
Create new melody combinations by rearranging variations using slot dials. This AI-powered tool analyzes musical structure to generate new compositions, aiding composers in projects requiring many variations. Explore next-generation music production and consumption.
- Dial-based melody variation selection
- Grid tile operation for timeline visualization
- Melody shuffle via device shake
- Song and part selection
- AI-driven musical structure analysis
- Next-generation music creation
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Melody Slot Machine is an application developed by RIKEN towards the integration of music and AI. You can create new melody combinations by rearranging melody variations using slot dials. When the composer composes melody variations, the structure of the melody is analyzed using a theory of music known as generative theory of tonal music (GTTM). Even if the melody switches to another variation in the middle, the structure will not be disrupted. You can expand the possibilities of composition with Melody Slot Machine. - Dial operation By rotating the dials similar to a slot machine, you can select a melody from multiple variations. The dial scrolls to the left as the performance progresses, and the leftmost dial on the screen represents the score of the performance currently being played. - Grid tile operation The horizontal grid tiles below the dials show the dial changes throughout the song. Swipe up to expand and use the elongated grid tile. - Melody shuffle When you shake your iPhone, all the dials rotate simultaneously, similar to when you pull the lever on a slot machine and stop at a random combination. - Song selection / Part switching You can select a song by pressing the musical note button. For songs containing multiple parts, you can press the button to switch between parts. - Development history The Music Information Intelligence Team, part of the RIKEN Center for Advanced Intelligence Project, is exploring potential new ways of creating and listening to music using AI. The Melody Slot Machine is an example of next-generation music production and consumption in which AI automatically analyzes the structure of a melody and resynthesizes a new melody using the obtained structure. We aim to support composers in projects that require many variations, such as in movies and games. The app is available to the public to gauge the overall interest in such a method of music creation. We ask that users the app who are prompted to fill out a questionnaire to please submit their responses. We plan to add songs in the future. If you are interested in the app and technology, please contact us at the support URL.
Screenshots
Verdict
The clearest difference is price: MelodySlotMachine at Free against Chord NOTE's $2.99. MelodySlotMachine also leads on rating (5.0 vs 3.0) and in-app purchases (none vs 1). Chord NOTE's advantage is ratings volume (3 vs 1). On 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
MelodySlotMachine is free to download; Chord NOTE costs $2.99 up front. Chord NOTE sells 1 one-off in-app purchase. MelodySlotMachine asks for nothing beyond the download.
MelodySlotMachine holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Chord NOTE ships an update every 2 months, MelodySlotMachine weekly. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.
| Parameter | Chord NOTE | MelodySlotMachine |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.0 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 61.5% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.1 | 11.4 — better |
| Further details — not scored | ||
| Size | 31 MB | 192 MB |
| Age rating | 4+ | 4+ |
| Developer | Hidenori Matsuoka | newforestar co,.ltd |
Customer experience
Chord NOTE
MelodySlotMachine
In-app purchases
Chord NOTE
- Advanced Option$1.99
MelodySlotMachine
No in-app purchases
Questions
Is Chord NOTE free?
Is MelodySlotMachine free?
Which has better reviews, Chord NOTE or MelodySlotMachine?
Do Chord NOTE or MelodySlotMachine have ads?
Which is updated more often, Chord NOTE or MelodySlotMachine?
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