Comparison

Harmonicer vs ChaosArp

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

Head to head
About

Harmonicer

This app generates musical inspiration by combining MIDI quantization, harmonization, and arpeggiation. It offers extensive scale support and allows for the creation of complex chords and rhythmic patterns to enhance musical compositions.

Highlights
  • MIDI Quantizer with 20+ scales
  • Custom scale support
  • Harmonizer with up to 4 voices
  • Arpeggiator with 10 modes
  • Process MIDI from any source
  • Standalone use with internal keyboard
Features
Read full description

Instant Inspiration at Your Fingertips Harmonicer combines MIDI Quantizer, Harmonizer and Arpeggiator into one convenient package. At the core of Harmonicer lies its Quantizer feature with over 20 pre defined scales and support for custom scales. Whether you're a seasoned composer or a novice musician, Harmonicer empowers you to effortlessly create melodies that are harmonically rich and sonically captivating. Unlock Limitless Harmonic Possibilities Harmonicer's Harmonizer functionality takes your compositions to new heights by automatically generating lush chords and harmonies. With up to 4 additional voices and intuitive controls, you can explore a vast array of harmonic possibilities and infuse your music with depth and emotion. Unleash Your Creativity with Dynamic Arpeggiation With Harmonicer's Arpeggiator, intricate rhythmic patterns and melodic sequences are just a few taps away. Whether you're crafting pulsating basslines, mesmerizing synth leads, or intricate melodies, the Arpeggiator empowers you to infuse your tracks with movement and energy, adding a dynamic edge to your music. Combining Power and Versatility What sets Harmonicer apart is its seamless integration of these three powerful tools, allowing users to utilize them individually or in combination to achieve complex compositions with ease. Whether you're looking to fine-tune a melody, enrich your harmonies, or add rhythmic complexity, Harmonicer provides the tools you need to inspire your musical vision and bring it to life. Specs: - Quantizer with support for 20+ pre defined as well as custom scales - Harmonizer with up to 4 additional voices - Arpeggiator with 10 modes, note repeates, ratchets and more - Process MIDI from any source - Standalone use via internal keyboard Supports: - Standalone - AUv3

About

ChaosArp

This music app generates complex and dynamic MIDI patterns using advanced algorithms. It offers a unique rhythm event feature and variance control for extensive customization, allowing users to create evolving musical sequences.

Highlights
  • Arpeggiator and step sequencer modes
  • Rhythm event feature with 13 algorithms
  • Pitch and rhythm variance control
  • Scale quantizer
  • Randomizable velocity and duration
  • 4 performance buttons
Currently charting
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Introducing ChaosArp, the next-level MIDI arpeggiator/step sequencer designed to transform your musical ideas into intricate, dynamic patterns with a unique twist. ChaosArp is not just any arpeggiator; it's a powerhouse tool that uses the same advanced algorithms as LoAdKer to modulate pitch, rhythm, velocity, and duration, creating evolving, complex but high musical patterns that breathe life into your music. Dive into the heart of your creativity with ChaosArp's innovative ‘rhythm event’ feature, which allows you to explore a variety of rhythmic modifications. From repeaters to stretchers and rests for extra space and emphasis—ChaosArp has it all. Each one of these rhythm events can be assigned to any of the 6 available slots, offering limitless possibilities. Fine-tune your sonic exploration with the innovative ‘variance’ control - which goes one step beyond the simple ‘probability’ control that most arpeggiators have. Adjusting this setting for either pitch or rhythm (or both) will vary the character of the generated sequences, from fairly minimalistic to completely chaotic, thus opening up a world of endless variations. Elevate your music production today with ChaosArp and unleash patterns that inspire! Features: - Two modes: arpeggiator and stepper - 1-16 steps - Scale quantizer, never miss a note again! - Variable rate, from 1/128 to 4 beats - 3 arpeggiator modes (up, down, up/down) - 3 stepper modes (forward, backward, ping-pong) - 1 to 4 octaves range - Latch mode - Pitch randomizer with probability and variance control and random octave - Rhythm event selector with probability and variance control - 6 assignable rhythm event slots - 13 rhythm event algorithms, including repeaters, stretchers, and rests - Repeat, stretch, and repeat rest probability controls for further customization of the rhythm event algorithms - Randomizable velocity and duration with variable range - 4 performance buttons that temporarily override the probabilities of pitch, rhythm, velocity, and duration - Automatable parameters

Screenshots

Harmonicer4 screens
ChaosArp4 screens

Verdict

The call

The clearest difference is update cadence: Harmonicer at every 4 days against ChaosArp's every 2 weeks. Harmonicer also leads on iOS requirement (11.0 vs 13.0). ChaosArp's advantage is price ($3.99 vs $7.99) and rating (4.9 vs 4.7). On review sentiment, 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

Harmonicer costs $7.99 and ChaosArp $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ChaosArp holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 12 and 9 respectively. Written reviews point the same way: 80% of Harmonicer's written reviews are positive against 83% of ChaosArp's.

UpkeepUpdate frequency

Harmonicer ships an update every 4 days, ChaosArp every 2 weeks. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 6 level
Harmonicer versus ChaosArp: the parameters behind the verdict, then further details
ParameterHarmonicerChaosArp
Price$7.99$3.99 — better
Rating4.7 (12 ratings)4.9 (9 ratings) — better
Positive reviews80.0% of reviews83.3% of reviews — better
Number of ratings12 — better9
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#183 — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size23 MB17 MB
Age rating4+4+
DeveloperKai ArasAchillefs Sourlas

Customer experience

Harmonicer

All ratings12 ratings
Positive91.7%
Neutral8.3%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

ChaosArp

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Harmonicer

No in-app purchases

None

ChaosArp

No in-app purchases

Questions

Is Harmonicer free?
Harmonicer costs $7.99, with no in-app purchases.
Is ChaosArp free?
ChaosArp costs $3.99, with no in-app purchases.
Which has better reviews, Harmonicer or ChaosArp?
ChaosArp is rated higher. Harmonicer averages 4.7 out of 5 from 12 ratings, while ChaosArp averages 4.9 from 9 ratings.
Do Harmonicer or ChaosArp have ads?
Neither Harmonicer nor ChaosArp shows ads.
Which is updated more often, Harmonicer or ChaosArp?
Harmonicer ships an update every 4 days, and ChaosArp every 2 weeks. Most recently, Harmonicer was updated on October 21, 2026 and ChaosArp on October 11, 2026.

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