Comparison

ChordWeaver vs Aurora (MIDI Controller)

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

Head to head
About

ChordWeaver

Compose music using advanced harmonic techniques with this app. Explore 3636 chord resolutions and 10 instrument ensembles. It guides you through chord progressions, allowing you to listen, transpose, and save your compositions.

Highlights
  • Modern harmony composition
  • 3636 chord resolutions
  • 10 instrument ensembles
  • Listen to chord resolutions
  • Transpose chords
  • Save as .chords or .mid
  • Mirror to main system
Features
Read full description

ChordWeaver is a music composition app based on 5-part modern harmony extensively used in symphonic scores, cinematic soundtracks, jazz chord changes and contemporary songwriting. ChordWeaver offers 3636 chord resolutions/combinations and 10 instrument or ensembles with 1920 sound files. The techniques used include altered chords (or unresolved appoggiaturas), parallel ninths, giant steps, tritone substitutions, bi-tonal ambiguities as well as traditional chord progressions. For some composers ChordWeaver will provide a fast, easy way to work with modern harmony. For other composers it offers a whole new world of possibilities and variations on traditional progressions. For the seasoned pro, it is a huge time saver. Here is how ChordWeaver efficiently guides you through the composition process. You choose your starting chord, and ChordWeaver instantly shows you and lets you listen to multiple resolutions to that chord, traditional ones and more creative, unusual ones. With each subsequent chord choice, the process is repeated. ChordWeaver seamlessly guides you to multiple possible chord options (some you will be familiar with and others you will not have considered), lets you listen to your work in progress, offers the option to transpose up or down and allows you to save your final product as a .chords file or .mid file and export or share it. You can also mirror ChordWeaver on your main system, play back the audio and improvise on your favorite instrument. Likewise, you could import the MIDI file into your sequencer and play back the harmonies using your preferred sample libraries. These chord options in ChordWeaver are the result of decades of studying the scores of the masters in various genres. They reflect the actual use of these chord progressions and resolutions by these composers and are not simply based on purely theoretical considerations.

About

Aurora (MIDI Controller)

Transform space weather data into musical expression with this live MIDI controller. Connect to your DAW and map real-time electromagnetic readings to create unique soundscapes and dynamic tracks.

Highlights
  • Live data streaming from observatories
  • Flexible MIDI mapping
  • Connects to DAWs like Ableton Live
  • Cross-platform compatibility (iOS, macOS)
  • Creates ambient and techno music
Features
Read full description

Aurora is a live MIDI controller powered by real-time data from space weather observatories and satellites. Connect Aurora to your favorite DAW (like Ableton Live) and transform electromagnetic readings into musical expression. Features: • Live data streaming from NOAA and Dombås observatory • Flexible MIDI mapping for CC controls • Works across iPhone, iPad, and Mac Catalyst Whether you're crafting ambient soundscapes or building dynamic techno tracks, Aurora connects your music to the rhythms of the planet.

Screenshots

Aurora (MIDI Controller)4 screens

Verdict

The call

ChordWeaver and Aurora (MIDI Controller) both sit at 5.0 stars, but that hides the real split: 100% of ChordWeaver's written reviews are positive against 50% of Aurora (MIDI Controller)'s. Aurora (MIDI Controller)'s advantage is price ($2.99 vs $9.99) and update cadence (every 8 days vs every 3 months). On rating, ratings volume, ads and in-app purchases 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

ChordWeaver costs $9.99 and Aurora (MIDI Controller) $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for ChordWeaver against 5.0 for Aurora (MIDI Controller). Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews are what separate them: 100% of ChordWeaver's written reviews are positive against 50% of Aurora (MIDI Controller)'s.

UpkeepUpdate frequency

ChordWeaver ships an update every 3 months, Aurora (MIDI Controller) every 8 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
ChordWeaver versus Aurora (MIDI Controller): the parameters behind the verdict, then further details
ParameterChordWeaverAurora (MIDI Controller)
Price$9.99$2.99 — better
Rating5.0 (5 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings5 — better2
Update frequencyEvery 3 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad — better
Requires iOS18.616.6 — better
Further details — not scored
Size474 MB6 MB
Age rating4+4+
DeveloperJeannot WelterJason Snell

Customer experience

ChordWeaver

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Aurora (MIDI Controller)

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

ChordWeaver

No in-app purchases

None

Aurora (MIDI Controller)

No in-app purchases

Questions

Is ChordWeaver free?
ChordWeaver costs $9.99, with no in-app purchases.
Is Aurora (MIDI Controller) free?
Aurora (MIDI Controller) costs $2.99, with no in-app purchases.
Which has better reviews, ChordWeaver or Aurora (MIDI Controller)?
ChordWeaver and Aurora (MIDI Controller) are both rated 5.0 out of 5 on the App Store, from 5 and 2 ratings respectively.
Do ChordWeaver or Aurora (MIDI Controller) have ads?
Neither ChordWeaver nor Aurora (MIDI Controller) shows ads.
Which is updated more often, ChordWeaver or Aurora (MIDI Controller)?
ChordWeaver ships an update every 3 months, and Aurora (MIDI Controller) every 8 days. Most recently, ChordWeaver was updated on October 1, 2026 and Aurora (MIDI Controller) on October 7, 2026.

Other comparisons