ChordLab vs YouCompose
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ChordLab
Explore modern four-part voice leading and chord permutations. This tool helps intermediate musicians discover new chord voicings and understand harmonic structures. Features include a Circle of Fifths, chord finder, and virtual instruments.
- Four-part voice leading calculator
- Chord finder for triads and seventh chords
- Interactive Circle of Fifths
- Virtual piano and guitar instruments
- All inversions and standard voicings
- Apple Watch app for chord spelling
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ChordLab is a specialist tool and calculator of sorts for modern four-part voice leading. Everyone has heard these colors in the arrangements of Big Bands - the horn riffs in the Jetsons carton song for example. With ChordLab we can in a way flip through all possible permutations of these chords. More theoretical background is available in the documentation. This is not a general chord app for beginning instrumentalists. To the intermediate player, however, ChordLab can be a source of great inspiration and introduction to many new color choices. Four-part harmony may feel restrictive on instruments capable of more than 4 voices, but for a small choir for example it is a basic fact of life. It has become a staple in modern music as well as it allows the accompanist to declutter the spectrum in a sense by playing fewer notes. Root and fifth substitutions are applied automatically when dialing up a chord in ChordLab. Simply like that. Once the quality of a chord has been set it can then be viewed and listened to in all standard and not so standard drop voicings and moved through its inversions. This is of particular importance to guitar players as quite a few voicings are impossible to play and one may be left with rather few options. Chord spelling is also the main feature of ChordLab's Apple Watch app. ChordLab has an interactive Circle of Fifths. With it we can look up key signatures for major and minor scales as well as all other modes derived of the major scale. So it is possible for example to display key signatures for all mixolydian scales and simultaneously highlight the other degrees for that mode. Additionally ChordLab displays degree structures for a key in standard Roman numerals. This is extremely useful when putting together chord progressions. Roots of the current harmonic domain are highlighted in white and can be tapped to audit the associated chords. The chord finder feature in ChordLab allows you to search its database for 3 or 4 note structures to determine their harmonic quality. To find a chord in its database ChordLab uses the enharmonically simplest solution and does not require you do know whether a note is called G# or an Ab. This is especially useful for guitarists that seldomly encounter chords in root position due to the tuning of the instrument. Features include: • Chord spelling for all common chords • Notation and textual representation of chord tones • Chord finder for triads and seventh chords • Alto, bass, tenor, treble clefs, TAB and grand staff • All inversions and standard voicings • Virtual piano and guitar instruments • Chord tone labeling in instrument views • All common open and alternate tunings presets (guitar) • Automatic root and fifth substitution • Apple Watch app There is a lot of functionality built into ChordLab, but as with any tool it is what we make of it. If chord spelling is a term in your vocabulary ChordLab should be of interest. Or maybe you want to grow your chord reportoire. Putting music theory into words often makes it sound overly complex yet nobody would say that orange or purple are complicated. ChordLab lets you play and work with colors in a sense and shows you how to play them on your instrument. It is very a unique tool for musicians, song-writers, professionals and music students and one that you will find yourself coming back to again and again.
YouCompose
Create original music effortlessly with an AI assistant. This app generates unique compositions using music theory and genetic algorithms, ensuring no copyright issues. It offers a wide range of built-in instruments and flexible editing tools.
- AI-powered music composition
- Original, copyright-free music generation
- 80+ built-in instrument sounds
- Over 85 predefined ensembles
- Multiple creation methods (keyboard, MIDI, grid, score)
- Classical and jazz harmonization
- Advanced editing capabilities
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Meet Aimée, your AI assistant composer, ready to help you create amazing music effortlessly. Aimée: Originality You Can Trust. In the evolving landscape of artificial intelligence and creativity, concerns about originality and copyright are paramount. Aimée, the AI-powered assistant in YouCompose, stands out by ensuring that the music she helps you create is entirely original and free from copyright issues. Aimée Doesn't Steal! Aimée's AI isn't trained on existing musical data. Instead, she generates her own unique musical content. This innovation is achieved through the clever use of an expert system that combines music theory with advanced genetic algorithms. As a result, Aimée produces truly original compositions that are not based on or derived from existing works. At the heart of Aimée's originality is an expert system grounded in comprehensive musical theoretical data. This system provides Aimée with a deep understanding of music, enabling her to compose with creativity and precision. Whether you're crafting a symphony or a simple melody, Aimée applies her theoretical knowledge to ensure your music is harmonically rich and structurally sound. Aimée also leverages genetic algorithms, which allow her to evolve and refine musical ideas through a process akin to natural selection. By iteratively improving upon initial ideas, Aimée can explore a vast space of musical possibilities, generating compositions that are both innovative and musically coherent. This approach is crucial in addressing potential copyright infringements. By not relying on pre-existing musical data, Aimée ensures that the music you create with her assistance is genuinely yours. Why Originality Matters? In the realm of music composition, originality is not just a matter of artistic integrity but also a legal necessity. Copyright infringement can lead to significant legal challenges and financial liabilities. Aimée's ability to create original music provides peace of mind, allowing you to focus on your creative process without worrying about potential legal repercussions. Features of YouCompose and Aimée: Built-in Instruments: - 80 instrument definitions with their sounds, including all regular orchestral instruments, keyboards, organs, guitars, basses, chorus, and percussion. - Over 85 predefined ensembles for quick setup, ranging from trios to orchestras. Creating and Editing: - Create melodies using the built-in virtual keyboard, a MIDI keyboard, a grid or score editor, by importing MIDI files, or by asking Aimée to generate them. - Aimée harmonizes your melodies in classical or jazz style, considering your chosen instruments. - Edit compositions by copying, pasting, moving, and deleting movements, segments, and individual notes. - Let Aimée compose a complete symphony or add new movements based on her own or your melodies. - Control harmonization with instrumentation tools, ‘Composition instructions,’ ‘Harmonization Points,’ or leave it to Aimée. - Combine classical and jazz styles within a single piece. - Special tools for entering lyrics, applying melodic transformations, and creating dynamic effects. Sharing and Saving: - Compatible with Audiobus, AudioCopy, and Inter-App Audio for seamless audio recording and integration with other apps. - CoreMIDI compatible for use with MIDI keyboards, sound modules, or synth apps. - Export audio files in MIDI, AAC, M4A, AIFF, CAF, and WAV formats, with M4A files containing iTunes data like ‘artist,’ ‘song name,’ and ‘lyrics.’ - View, print, save or export full scores and individual parts (transposed when applicable) as PDF. - Save compositions to your device, with options to share via iCloud, email, or AirDrop. - Share compositions through email with YouCompose files, audio files, MIDI files, and PDFs of scores and parts. YouCompose also includes several sample compositions featuring well-known melodies, providing a rich starting point for your musical journey.
Screenshots
Verdict
The clearest difference is review sentiment: YouCompose at 70% against ChordLab's 22%. YouCompose also leads on in-app purchases (none vs 10) and ratings volume (35 vs 1). ChordLab's advantage is rating (5.0 vs 4.4) and price ($3.99 vs $12.99). On 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
ChordLab costs $3.99 and YouCompose $12.99 up front. ChordLab sells 10 one-off in-app purchases. YouCompose asks for nothing beyond the download.
ChordLab holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: YouCompose has 35 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 22% of ChordLab's written reviews are positive against 70% of YouCompose's, so the app with the better star average is not the one people write more warmly about.
ChordLab ships an update every 3 months, YouCompose every 4 months. The most recent releases landed on September 25, 2026 and October 9, 2026 respectively.
| Parameter | ChordLab | YouCompose |
|---|---|---|
| Price | $3.99 — better | $12.99 |
| Rating | 5.0 (1 ratings) — better | 4.4 (35 ratings) |
| Positive reviews | 21.7% of reviews | 70.0% of reviews — better |
| Number of ratings | 1 | 35 — better |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Mac |
| Requires iOS | 12.1 — better | 14.0 |
| Further details — not scored | ||
| Size | 40 MB | 399 MB |
| Age rating | 4+ | 4+ |
| Developer | RoGame Software | Elstar |
Customer experience
ChordLab
YouCompose
In-app purchases
ChordLab
- 01 Keyboard Pack$0.99
- 02 Guitar Pack$0.99
- 03 Bass Pack$0.99
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- 04 Strings Pack$0.99
- 05 Mallets Pack$0.99
- 06 Winds Pack$0.99
- 07 Synths Pack$0.99
- 08 Folk Pack$0.99
- 09 Winds Pack 2$0.99
- 10 Folk Strings Pack$0.99
YouCompose
No in-app purchases









