Comparison

Decibel ScorePlayer vs Scaler 3

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

Head to head
About

Decibel ScorePlayer

This app synchronizes music scores across multiple iPads for network-based scrolling. It's ideal for reading graphic notation during rehearsals and performances, offering features like adjustable scroll speed and section navigation.

Highlights
  • Network-synchronized scrolling scores
  • Proportional color music notation
  • Adjustable scroll speed
  • Section navigation slider
  • Full score or individual part view
  • Wi-Fi network compatibility
Features
Read full description

ScorePlayer allows for network-synchronised scrolling of proportional colour music scores on multiple iPads. This is designed to facilitate the reading of scores featuring predominantly graphic notation in rehearsal and performance. Key Features: Comes with four built in scores, created by composers in Decibel new music ensemble, Cat Hope and Lindsay Vickery. Ability to change scroll speed of the piece. Easy to use slider to navigate to different sections of the piece for rehearsal purposes. View full score or individual parts. Works across any wi-fi connection. Easy network check to verify which devices are on the network. Modular structure enables easy updates, with more scores to come. Upload facilities are planned in future releases.

About

Scaler 3

This music theory workstation helps you discover chords, explore harmony, and build complete musical ideas. It offers a redesigned workflow, expanded creative potential, and powerful new capabilities for songwriting and music production.

Highlights
  • Discover music's key with MIDI and audio detection
  • Access over 1,000 chord sets, keys, and modes
  • Build intelligent chord progressions with automatic voice-leading
  • Structure full musical ideas with Scenes and Arrange Page
  • Transform chords into melodies, basslines, and phrases
  • Explore harmony with Circle of Fifths and modulation tools
  • Host AUv3 plugins and interoperate with desktop versions
Features
Read full description

The world’s most popular music theory workstation, Scaler 3, is now available on iPad — updated to Scaler 3.3 with Multi-Bind, improved Detection, enhanced workflow and desktop interoperability. With a redesigned workflow, expanded creative potential and powerful new capabilities, Scaler 3 helps you discover chords, explore harmony and build complete musical ideas. The workflow doesn’t have to end with your finished chord progression - Scaler 3 can host AUv3 plugins and features a full arranger and mixer, letting it fit into your existing setup or become your entire creative environment for music theory. Browse Draw from over 1000 chord sets, keys and modes, organised by mood, artist and genre. Build chord progressions by dragging and dropping chords, and receive intelligent suggestions for what could come next. Create Explore harmonic possibilities using tools like the Sketch Pad, Explore page, Circle of Fifths and Modulation pathways. Scaler’s creative tools and music theory assistance help you move beyond common progressions and discover new musical ideas. Arrange Turn your progression into a full musical sketch with tracks for chords, bass, melodies and custom MIDI patterns. Use Multi-Bind to perform and loop multiple lanes at once, creating fast composition ideas and live performance workflows. Scaler 3 can generate MIDI for all sorts of instruments and adapt it to the needs of your song. Host AUv3 plugins to play your parts, transforming Scaler 3 into a powerful composition and MIDI production environment. Key Features • Discover your music’s key with MIDI and audio detection and explore compatible scales, modes and chord sets • Access over 1,000 chord sets, keys and modes organised by mood, genre and artist inspiration • Build intelligent chord progressions with automatic voice-leading • Use Scenes and the Arrange Page timeline to structure full musical ideas • Transform chords into melodies, basslines, arpeggios and phrases using Scaler’s Motions library • Explore harmony using the Circle of Fifths, chord substitutions, inversions and voicing tools • Experiment with modulation suggestions to move between keys • Record ideas directly with User Track and edit them in the piano roll • Perform one-finger chords and melodies using Bind MIDI • Route generated chords and performances to other music apps using AUv3 and MIDI output • Play progressions using internal instruments including pianos, synths and orchestral sounds • Works standalone or alongside apps like Logic Pro for iPad, GarageBand, AUM and Cubasis • Move between Scaler 3 on iPad and desktop by sharing presets, chord progressions and files Content • Thousands of chords, scales and harmonic possibilities • Artist chord sets created by musicians including Carl Cox, MJ Cole and The Temper Trap • Generate MIDI with hundreds of melodic phrases, basslines and performances • Internal instrument library including pianos, synths and orchestral sounds Perfect For • Songwriting • Music production • Composition • Learning harmony and music theory • Exploring new musical ideas What People Are Saying “Scaler 3 is an incredibly powerful music theory tool. It's a gamechanger for both beginners and seasoned producers.” -David Wills (Michael Jackson, Whitney Houston, Phil Collins) “Scaler 3 opens up a whole new world of possibilities… a fantastic gateway into harmony and composition.” -Daryl Bennett (Grammy-nominated composer) “Scaler 3 has evolved into a fully-fledged compositional toolkit. A triumph.” -Sound On Sound “Scaler 3 delivers the most comprehensive, powerful set of composition tools you can get.” -Attack Magazine “Scaler 3 takes everything that made Scaler 2 brilliant and makes it even better.” -The Sound Test Room Awards • KVR Readers Choice Awards - Winner 2025 • Plugin Boutique Awards - Best Music Theory Software 2025 • Sanjay C #1 Tool - Top Plugin of 2025 • #1 Music Theory App - Future Music Magazine 2024

Verdict

The call

The clearest difference is review sentiment: Scaler 3 at 50% against Decibel ScorePlayer's 0%. Scaler 3 also leads on rating (4.7 vs 4.0) and ratings volume (162 vs 2). Decibel ScorePlayer's advantage is price ($2.99 vs $19.99). On ads, in-app purchases, monetization model 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

Decibel ScorePlayer costs $2.99 and Scaler 3 $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Scaler 3 holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Scaler 3 has 162 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Decibel ScorePlayer's written reviews are positive against 50% of Scaler 3's.

UpkeepUpdate frequency

Decibel ScorePlayer ships an update every 6 weeks, Scaler 3 fortnightly. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

Scorecard5 real differences · 5 level
Decibel ScorePlayer versus Scaler 3: the parameters behind the verdict, then further details
ParameterDecibel ScorePlayerScaler 3
Price$2.99 — better$19.99
Rating4.0 (2 ratings)4.7 (162 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings2162 — better
Update frequencyEvery 6 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPad
Requires iOS15.6 — better16.0
Further details — not scored
Size114 MB1.1 GB
Age rating4+4+
DeveloperMonash UniversityScaler Music

Customer experience

Decibel ScorePlayer

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Scaler 3

All ratings162 ratings
Positive92.0%
Neutral4.3%
Negative3.7%
Written reviews20 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

In-app purchases

None

Decibel ScorePlayer

No in-app purchases

None

Scaler 3

No in-app purchases

Questions

Is Decibel ScorePlayer free?
Decibel ScorePlayer costs $2.99, with no in-app purchases.
Is Scaler 3 free?
Scaler 3 costs $19.99, with no in-app purchases.
Which has better reviews, Decibel ScorePlayer or Scaler 3?
Scaler 3 is rated higher. Decibel ScorePlayer averages 4.0 out of 5 from 2 ratings, while Scaler 3 averages 4.7 from 162 ratings.
Do Decibel ScorePlayer or Scaler 3 have ads?
Neither Decibel ScorePlayer nor Scaler 3 shows ads.
Which is updated more often, Decibel ScorePlayer or Scaler 3?
Decibel ScorePlayer ships an update every 6 weeks, and Scaler 3 fortnightly. Most recently, Decibel ScorePlayer was updated on October 13, 2026 and Scaler 3 on October 15, 2026.

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