Scaler 2 4+

Empower the Composer Within

ScalerPlugin Pty Ltd

    • 4.7 • 232 Ratings
    • Free
    • Offers In-App Purchases

iPad Screenshots


Used by the world's top music producers.
Free download. One time InApp Purchase.
*MusicTech Gear of the Year Award 2020
*Winner Best Music Theory Software PIB Awards 2022

Scaler 2 iOS is a multiple award winning music theory workstation redesigned from the ground up for iPad OS. Scaler 2 is an inspirational and creative music tool that gives you access to a world of new ideas, expressions and melodies. With powerful detection of MIDI and audio, Scaler 2 can determine what key and scale you’re in and suggest chords, melodies and basslines that match your music. Scaler 2 can connect to any keyboard, synth or device using bluetooth audio and midi. Scaler is fully compatible with GarageBand and Audio Mixers to get you writing music on the fly in an environment that suits you. Scaler 2 makes finding chords and progressions intuitive and fun! It’s a comprehensive but easy to use toolbox that will help anyone make better music.

Main Features:

Discover your music’s key and explore alternative scales, modes and chord sets
Choose from hundreds of keys and modes, quickly build progressions in the sequencer
Play and record one-finger chords and melodies using Scaler 2’s Bind MIDI function
Play melodic expressions, phrases, performances, sequences, basslines, melodies and rhythms written by professional musicians across various time signatures
Establish your musical key and scale with audio detection as well as MIDI detection
Generate bass lines and melody lines adapted to your current scale and chords
Chord Charts: displays a guitar chord diagram for any chord and Fretboard Views allows you to explore the neck of your guitar
Export MIDI to your iOS DAW or export session to Scaler Plugin for use across all computer based DAWs

Compatible with Bluetooth MIDI Keyboards and all MIDI Keyboards via USB/Lightning Adapter
Standalone and AUv3 app that can control your favourite iPAD synths and work alongside thousands of AudioBus and AUM compatible apps including Logic Pro for iPad and Cubasis
Redesigned from the ground up to work with iPad OS with new menu and UI Navigation
Scaler is a free download and comes with 5 integrated sounds and the main features. Unlock all remaining features, content and internal sounds with one time unlock all feature


Over 200 artist chord sets from the likes of Carl Cox, MJ Cole, The Temper Trap, Mitekiss, CeCe Rogers and Mike Huckaby
Over 500 unique genre, common and mood-based chord sets such as Ambient, Drum & Bass, Jazz, Cinematic, EDM, Rock
Over 600 chord sets and hundreds of unique scales
Over 500 phrases, performances, sequences, basslines, melodies and rhythms by professional musicians across various time signatures
45 internal electronic, acoustic and orchestral instruments created by award winning producers
Over one hundred artist created modulation pathways to get you from one key to another
Over one hundred chord substitutions that lend variety to your progressions

Performing and creating:

Create unique chords by searching & selecting from the circle of fifths or by entering note by note on your keyboard in Chord Edit mode
Keys Lock helps you create emotive melodies by locking keys to your chords
MIDI Capture lets you perform inside Scaler 2 and then export the results as MIDI
Modulation Page gives you new ways to reach musical destinations
Suggest Mode helps you add complexity and artistry to your chord progressions
Edit Modes for adjusting length, velocity, inversion, octave, timing and performances more per chord in a pattern
Pad View helps you to arrange and play through multiple patterns and key switch between them
Voice Grouping can keep your chords within a certain range for voice leading
Chord editing and moving tools include lasso, drag n drop, replace and insert
Midi Mapping allows you to change, performances, scales and patterns on the fly
Get more natural-sounding melodies and expressions with the humanise and quantise function
Use the arpeggio or strum features to perform in real-time and synced to your DAW


Plugin Boutique 'Best Music Theory Software' Award Winner 2022
Music Tech Magazine 'Gear of the Year' Award Winner 2020

What’s New

Version 2.8.1

• Content
- 66 Song Chordsets: Ambient, Anime, Synth Divisi 4 Part, Latin Jazz, Movie Theme, Reggae, J-Pop, K-Pop
- 14 Artists Chordsets: Lloyd Brown, Pablo Sanchez
- Expressions Patterns: EDM Bass, Melodic Bass, Sidechain Bass, Common Progression Phrases, Common Rhythms, 7/4 Rhythms, 9/4 Rhythms
- 9 Japanese scales
- New Slap Bass sound.
- New guitar chord positions.
• Improvements
- Fix Modal Interchange chord naming.
- Fix Japanese scales grouping.
- Prevent host from losing plugin state when changing sample rate.
- Improves compatibility and GUI responsiveness with Logic Pro for iPad
- Prevent CPU spikes when starting recording or using MIDI Panic.
- Ensure performance parameters are reset properly when switching bind OFF.
- Fix playback timings being reset when moving chords to empty slots or reordering slots in Section C.
- Prevent NoteOff messages from sharing the same sample number as the next NoteOn event of the sequence.
- Force “.mid” extension on exported MIDI capture files.
- Ensure notes are named correctly according to the selected scale in Modal Interchange screen and Keys Lock mode.

Ratings and Reviews

4.7 out of 5
232 Ratings

232 Ratings

Terbano ,

Strongest iOS app for composition

Scaler is a terrific app. I’m already educated in music theory, but I use it mostly as an arrangement tool, and to quickly fine tune voicings in my compositions. David and the dev team at Scaler also pay a lot of attention to their user’s feedback, warts and all, and even have dialogues on the points worth discussing. For that reason, I’m quite confident this tool will continue to evolve and become more useful.

I’ve been on the desktop version for a good spell, and it’s found a deeper spot in my professional workflow as updates have been released. That’s always a very good sign. I recently added the iOS version, and can say after a few weeks of putting it through the paces that it’s the equal of the desktop version. It’s been very stable, as well, which is gold in a professional environment. I’m looking forward to seeing what they cook up next for version 3.

Recommended. Well worth it.

Developer Response ,

Thanks Terbano, appreciate the feedback and yes we will support both platforms as we always have and lots on the way!

Guitarjoshb ,

This app is unbelievable!

Edit: I originally thought that you couldn’t export the .midi file because when you try to do it the “caveman way” like I did, which was to save and export whatever I had saved, you would just get an xml file, however, thanks to the response from the dev team, the feature is there and a lot easier than I thought.

Edit: Thanks for the response… I tried exactly what you wrote and it works perfectly… I checked the forums etc. and I haven’t seen this particular solution. It was a bit difficult to find in the manual, but nonetheless, thank you. This now does everything I need and hoped that it would do! Awesome product! Changing to 5* now

Developer Response ,

Hi Guitarjoshb. Thanks for the feedback. Have you tried saving chord sets or using the midi capture as methods of exporting MIDI? There are several ways to export midi to your computer. May we suggest you check the manual and also join the scaler community where some of the devs and other users may be able to help. Hope that helps.

Harrison Floored ,

Needs work

OK, so it works as advertised, but the interface and app flow are klunky and the content is really bloated. I would like two things to change, one is to make patterns and chords into separate purchases because there is just to much bloat. I really don’t like having to search through menu lists for patterns and styles, and even if I find a performance or pattern that I somewhat like it cannot be edited. The screen real estate is handled badly and too much diving through menus or changing pages to develop a smooth workflow. If you like the style of having the app do your creative work it’s great, but as a creator I don’t see it being very helpful to develop my own ideas. I will keep this in hopes that it will improve but for now it’s just too cluttered to be useful to me. Best to all who like it, and may it serve you well. PS don’t recommend training courses. I have around a hundred music apps on my iPad and none of them are as obtuse as Scaler.

Developer Response ,

Thanks for the feedback Harrison. We've always felt there is room for improvement, we are working on an overhaul and very excited about what the future may bring. If you get some time we'd love you to be patient with Scaler 2 in its current form, it's used by many of the worlds top producers and composers and we are fortunate to count over 300,000 registered users across iOS and MacOS whom get along well with, and cherish Scaler 2.

App Privacy

The developer, ScalerPlugin Pty Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


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