Comparison

WorldScales vs ChoirMate

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

Head to head
About

WorldScales

Explore musical scales beyond equal temperament. Tune individual keys, experiment with diverse presets, and create your own tunings. Connect MIDI keyboards for a fully customizable microtonal music experience.

Highlights
  • Individual key tuning (+- 100 cents)
  • 35+ high-quality sampled instruments
  • MIDI In for external keyboard control
  • Preset scales (Western, Byzantine, Oriental)
  • Save custom scales and tunings
  • Frequency ratio, frequency, or cents input
  • Audio effects (reverb, compressor)
Features
Read full description

WorldScales Discover a world beyond standard tuning. Not all scales are created equal. WorldScales lets you explore the rich diversity of musical tuning systems from around the globe, freeing you from the limitations of modern equal temperament. Most modern instruments are tuned using the equal-tempered system, which divides the octave into twelve equally spaced notes. While this tuning has dominated Western music for centuries, many cultures and historical traditions use alternative systems that create unique colors, moods, and expressions. From Byzantine chant and Middle Eastern maqamat to ancient European tunings and custom microtonal scales, WorldScales opens the door to a broader musical universe. Whether you're a musician, composer, educator, researcher, church musician, or simply curious about alternative tuning systems, WorldScales gives you the tools to experiment, learn, and create. Features • Tune every note of the octave individually with precision up to ±100 cents. • Over 35 high-quality sampled instruments, including piano, violin, organ, oud, kanun, choir voices, and more. • MIDI input support. Connect an external MIDI keyboard and perform microtonal music using custom tunings. • Extensive collection of Western, Byzantine, Oriental, and world music scale presets. • Diatonic Mode: Play using only the white keys while automatically disabling the black keys, making it easier to perform scales without accidental chromatic notes. Perfect for educational use, Byzantine music, traditional melodies, and musicians who prefer a simplified playing experience. • Create, save, and recall your own custom scales and tuning systems. • Enter tunings using cents, frequency ratios, or exact frequencies. • Visual keyboard display showing scale notes and root positions. • Instantly transpose scales by changing the root note while preserving all interval relationships. • Built-in audio effects including reverb and compression. • Polyphonic instruments with multiple velocity layers for enhanced realism. • Designed for musicians, composers, educators, and students interested in microtonal music and world musical traditions. Explore New Musical Possibilities WorldScales combines powerful tuning tools with a diverse collection of instruments, making sophisticated microtonal performance accessible to everyone. Whether you want to explore ancient traditions, recreate historical tunings, discover world music scales, experiment with microtonality, or simply play in Diatonic Mode using only the white keys, WorldScales provides an intuitive and flexible environment for learning, performing, and creating music. Expand your musical horizons. Tune beyond the ordinary.

About

ChoirMate

This app helps choirs manage their activities, practice, and communication in one place. It offers features like set lists, audio files, sheet music, and a calendar. Designed for conductors, board members, and choir members, it aims to simplify choir organization and practice.

Highlights
  • Set lists
  • Audio file management
  • Sheet music access
  • Communication tools
  • Activity calendar
  • Self-practice features
  • File storage
Features
Read full description

Do as thousands of choirs have done already and start enjoying ChoirMate today. ChoirMate is highly regarded by choirs seeking top-class practice opportunities and a comprehensive overview of all their activities in one place. ChoirMate assists with set lists, audio files, sheet music, communication, activity calendar, self-practice, group polls, and file storage. It is designed for conductors, board members, and choir members alike. As a conductor or choir committee member, you can create your choir for free in the app and invite choristers with an invitation link. Users can upgrade to the ChoirMate Premium subscription individually, or opt for the discounted package offers—ChoirMate Standard or ChoirMate Premium—for the entire choir. However, even the extensive free features will likely revolutionize your choir life. If you choose to subscribe in the app, a monthly charge will be applied to your iTunes account at the end of the trial period. Subscriptions will automatically renew unless canceled within 24 hours before the end of the current period. You can cancel anytime in your iTunes settings. Any unused portion of a free trial will be forfeited if you purchase a subscription. For more information see our Terms and conditions and Privacy policy. Terms of service: https://www.choirmate.com/terms-of-service ChoirMate is created by singers and advisers within the music profession, specifically for choirs. It’s time for choirs to receive the digital tools they deserve. We hope you enjoy ChoirMate and welcome any suggestions for improvement.

Screenshots

WorldScales4 screens
ChoirMate4 screens

Verdict

The call

The clearest difference is price: ChoirMate at Free against WorldScales's $19.99. ChoirMate also leads on update cadence (every 8 days vs every 2 months) and review sentiment (98% vs 75%). WorldScales's advantage is in-app purchases (none vs 1). On rating, ads, device support and iOS requirement 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

ChoirMate is free to download; WorldScales costs $19.99 up front. ChoirMate sells 1 in-app purchase, starting at $4.99 per month. WorldScales asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ChoirMate holds the better App Store score, 4.8 against 4.7. That said, the two scores are not equally well evidenced: ChoirMate has 189 ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 75% of WorldScales's written reviews are positive against 98% of ChoirMate's.

UpkeepUpdate frequency

WorldScales ships an update every 2 months, ChoirMate every 8 days. Both last shipped on October 29, 2026.

Scorecard6 real differences · 4 level
WorldScales versus ChoirMate: the parameters behind the verdict, then further details
ParameterWorldScalesChoirMate
Price$19.99Free — better
Rating4.7 (23 ratings)4.8 (189 ratings) — better
Positive reviews74.5% of reviews98.1% of reviews — better
Number of ratings23189 — better
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.0 — better15.6
Further details — not scored
Size192 MB208 MB
Age rating4+4+
DeveloperKelfar TechnologiesSounds Good

Customer experience

WorldScales

All ratings22 ratings
Positive95.5%
Neutral0.0%
Negative4.5%
Written reviews55 reviews
Positive74.5%
Neutral7.3%
Negative18.2%

ChoirMate

All ratings187 ratings
Positive95.7%
Neutral2.1%
Negative2.1%
Written reviews269 reviews
Positive98.1%
Neutral0.4%
Negative1.5%

Bugs and requests

WorldScales

Not enough reviews yet to summarise bugs or requests.

ChoirMate

Reported bugs

2 issues
  • Notification issues
  • Occasional crashes

Requested features

3 requests
  • Dark mode option
  • Ability to annotate sheet music
  • Improved mobile/car integration

In-app purchases

None

WorldScales

No in-app purchases

1 purchases

ChoirMate

Subscriptions1
  • ChoirMate Premium7 Days trial$4.991 Month

Questions

Is WorldScales free?
WorldScales costs $19.99, with no in-app purchases.
Is ChoirMate free?
ChoirMate is free to download, with in-app purchases available.
Which has better reviews, WorldScales or ChoirMate?
ChoirMate is rated higher. WorldScales averages 4.7 out of 5 from 23 ratings, while ChoirMate averages 4.8 from 189 ratings.
Do WorldScales or ChoirMate have ads?
Neither WorldScales nor ChoirMate shows ads.
Which is updated more often, WorldScales or ChoirMate?
WorldScales ships an update every 2 months, and ChoirMate every 8 days. Most recently, WorldScales was updated on October 29, 2026 and ChoirMate on October 29, 2026.

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