Comparison

ChordWeaver vs Krill Synthesizer

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

Krill Synthesizer

This virtual analog polyphonic synthesizer offers a streamlined interface for creating quick synth sounds on iPad. It features two oscillators, an LFO, a low-pass filter, two envelopes, and stereo effects, all accessible from a single screen.

Highlights
  • Virtual analog polyphonic synthesizer
  • Single-screen interface
  • Two oscillators
  • One LFO
  • Low-pass filter
  • Stereo chorus and ping-pong delay
  • 64 presets
Features
Read full description

The GSi Krill Synthesizer was born from a design originally conceived to work as a mono synthesizer on an embedded processor (RP2040), then it was modified to be polyphonic for a more powerful processor (ARM H7) and finally we thought it would be perfect as a AUv3 for iPad, for those quick and dirty synth sounds you sometimes need without getting lost in endless parameter navigation and menu diving. So here it is, just one screen, one knob - one function, what you see is what you get. Two oscillators, one LFO, one low pass filter, two envelopes, stereo chorus, ping-pong delay, 64 presets. Have fun!

Screenshots

Krill Synthesizer1 screens

Verdict

The call

The clearest difference is update cadence: Krill Synthesizer at weekly against ChordWeaver's every 3 months. Krill Synthesizer also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.6). ChordWeaver's advantage is price ($9.99 vs $11.99). On rating, review sentiment, ratings volume and ads 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 Krill Synthesizer $11.99 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 Krill Synthesizer. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

ChordWeaver ships an update every 3 months, Krill Synthesizer weekly. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

Scorecard4 real differences · 6 level
ChordWeaver versus Krill Synthesizer: the parameters behind the verdict, then further details
ParameterChordWeaverKrill Synthesizer
Price$9.99 — better$11.99
Rating5.0 (5 ratings)5.0 (6 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings56 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS18.611.0 — better
Further details — not scored
Size474 MB8 MB
Age rating4+4+
DeveloperJeannot WelterGenuine Soundware

Customer experience

ChordWeaver

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

Krill Synthesizer

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ChordWeaver

No in-app purchases

None

Krill Synthesizer

No in-app purchases

Questions

Is ChordWeaver free?
ChordWeaver costs $9.99, with no in-app purchases.
Is Krill Synthesizer free?
Krill Synthesizer costs $11.99, with no in-app purchases.
Which has better reviews, ChordWeaver or Krill Synthesizer?
ChordWeaver and Krill Synthesizer are both rated 5.0 out of 5 on the App Store, from 5 and 6 ratings respectively.
Do ChordWeaver or Krill Synthesizer have ads?
Neither ChordWeaver nor Krill Synthesizer shows ads.
Which is updated more often, ChordWeaver or Krill Synthesizer?
ChordWeaver ships an update every 3 months, and Krill Synthesizer weekly. Most recently, ChordWeaver was updated on October 16, 2026 and Krill Synthesizer on October 11, 2026.

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