Chord Randomizer vs OpenScore
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Chord Randomizer
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Chord Randomizer is a powerful music theory practice tool from Nathaniel School of Music. Whether you're a beginner just learning your triads or an advanced musician drilling diatonic progressions, Chord Randomizer keeps your practice sessions fresh and effective. FEATURES - Randomised chord progressions so you never practice the same sequence twice - Three skill levels: Beginner, Intermediate, and Diatonic - Live audio playback with realistic instrument sounds: piano, guitar, harp, and cello - Arpeggio and block-chord playback modes, each with independent volume - Built-in metronome with configurable BPM from 40 to 240 - Playback speed multiplier: 1x, 1.5x, and 2x - Chord rate control: change chords every beat, every bar, or every two bars - Loop mode for continuous practice - MIDI export for use in any DAW - PNG export to share a clean chord chart with students or bandmates - Dark, professional UI optimised for practice sessions PERFECT FOR - Music students building chord recognition - Teachers generating practice exercises - Songwriters and composers exploring new progressions - Guitarists, pianists, and keyboardists of all levels Chord Randomizer runs entirely on-device. No account is needed, and no data is collected.
OpenScore
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Open your sheet music and focus on playing. OpenScore brings score management, annotation, page turning, and practice tracking together in one app. From daily practice to stage preparation, open the music you need on iPhone and iPad. โข Import PDFs and photos of your scores, or capture paper sheet music with the camera. Arrange your pieces into setlists so the music you need for practice and performance comes up in order. โข Mark fingerings, expression, and tricky spots with freehand notes and the highlighter. Keep what you learned in your lesson and noticed while practicing right on the page. โข Turn to the next page with a wink or a nod. Keep reading even while both hands are on the instrument. โข Set your tempo with the metronome and record your playing. Listen back to find what to polish in your next session. โข Check your practice time by piece and your daily history. Look back on the practice you've built up and shape a routine of your own. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Chord Randomizer at none against OpenScore's 2. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. OpenScore sells 2 in-app purchases, starting at $12.99 per year. Chord Randomizer asks for nothing beyond the download.
| Parameter | Chord Randomizer | OpenScore |
|---|---|---|
| Price | Free | Free |
| Update frequency | โ | Every 5 days |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 15.0 โ better | 16.4 |
| Further details โ not scored | ||
| Size | 19 MB | 103 MB |
| Age rating | 4+ | 4+ |
| Developer | Jason Zachariah | Nemo Studio (KR) |
In-app purchases
Chord Randomizer
No in-app purchases
OpenScore
- Pro3 Days trial$12.991 Year
- Plus$19.99









