Comparison

Chladni Screen vs Poly 2

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

Head to head
About

Chladni Screen

Explore the mesmerizing patterns created by sound vibrations on a digital surface. This app simulates Chladni figures, visualizing how different sounds, including your voice and instruments, create intricate geometric shapes.

Highlights
  • Simulates Chladni figures digitally
  • Visualizes sound vibrations
  • Uses voice and instruments as sound sources
  • Displays geometric patterns
  • Offers multiple display modes
Features
Read full description

Chladni figures were geometric figures first discovered by Robert Hooke in 1680 and was researched and published by Ernst Chladni in 1787. These geometric figures are typically rendered on a rigid, vibrating membrane made from materials such as metal, plastic, glass, or bowl, covered with grains, like salt and sand, and changes shapes in response to different sounds that are transmitted by mediums such as speakers and actuators. The study of such phenomena is also known as cymatics. Chladni is able to simulate the phenomena digitally. A further 3 programs can be displayed by pressing and holding each of the 3 mode buttons. Some texts in this document are taken from the following Wikipedia Creative Commons license (inheritance). https://en.wikipedia.org/wiki/Ernst_Chladni Explore the wonders and beauty of the Chladni figures as it manifests from varying sound sources such as your voice and instruments!

About

Poly 2

This app generates evolving musical patterns and melodies using polyrhythms. It offers extensive sound manipulation with a sampler, multiple effects, and the ability to store numerous configurations. Users can also import their own sounds and integrate with other music production tools.

Highlights
  • Generative polyrhythm sequencing
  • Up to 8 simultaneous sounds
  • Sampler with envelopes and filters
  • Randomize capabilities
  • Built-in delay, reverb, distortion, and EQ FX
  • AUv3, Audiobus, and IAA support
  • Import custom samples
Features
Read full description

Poly 2 is a generative sequencer that creates evolving patterns and melodies based on the power of polyrhythms. Check out the promo video: https://youtu.be/ovCXtBynEkw Features: - Up to 8 different sounds at any time - Store up to 16 different configurations for each project - A sampler that includes envelopes, filters, loop crossfading, an LFO and more - Randomise capabilities - Delay, reverb, distortion and EQ FX - Over 100 samples included for free - 13 premade collections of sounds - 13 example projects - AUv3 support, both MIDI and Audio - Audiobus and IAA - Ableton Link - MIDI notes in / out, MIDI CC in / out and MIDI clock in - Import your own samples via iOS Files or WIFI transfer

Screenshots

Chladni Screen4 screens
Poly 24 screens

Verdict

The call

The clearest difference is price: Poly 2 at Free against Chladni Screen's $1.99. Poly 2 also leads on review sentiment (84% vs 49%) and update cadence (every 4 weeks vs every 8 months). Chladni Screen's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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

Poly 2 is free to download; Chladni Screen costs $1.99 up front. Poly 2 sells 1 one-off in-app purchase. Chladni Screen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Poly 2 holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Poly 2 has 686 ratings behind it against 81, so its average is the more settled of the two. Written reviews point the same way: 49% of Chladni Screen's written reviews are positive against 84% of Poly 2's.

UpkeepUpdate frequency

Chladni Screen ships an update every 8 months, Poly 2 every 4 weeks. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

Scorecard7 real differences · 3 level
Chladni Screen versus Poly 2: the parameters behind the verdict, then further details
ParameterChladni ScreenPoly 2
Price$1.99Free — better
Rating4.6 (81 ratings)4.8 (686 ratings) — better
Positive reviews48.6% of reviews84.1% of reviews — better
Number of ratings81686 — better
Update frequencyEvery 8 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.6
Further details — not scored
Size1 MB153 MB
Age rating4+4+
DeveloperNarumi InadaJames Milton

Customer experience

Chladni Screen

All ratings81 ratings
Positive90.1%
Neutral1.2%
Negative8.6%
Written reviews35 reviews
Positive48.6%
Neutral5.7%
Negative45.7%

Poly 2

All ratings686 ratings
Positive95.0%
Neutral2.6%
Negative2.3%
Written reviews63 reviews
Positive84.1%
Neutral4.8%
Negative11.1%

Bugs and requests

Chladni Screen

Not enough reviews yet to summarise bugs or requests.

Poly 2

Reported bugs

3 issues
  • In-app purchase not working for some users
  • MIDI connectivity issues with certain apps
  • Crashes upon opening for some users

Requested features

8 requests
  • Ability to preview samples before importing
  • Autoslice/autochop functionality for samples
  • Support for larger sample imports and automatic slot filling
  • Granulizer effect
  • Note repeat and vinyl effects
Show 3 more
  • More built-in effects and processing options
  • Ability to create and arrange full songs
  • M1 Mac compatibility

In-app purchases

None

Chladni Screen

No in-app purchases

1 purchases

Poly 2

One-time1
  • Pro mode$11.99

Questions

Is Chladni Screen free?
Chladni Screen costs $1.99, with no in-app purchases.
Is Poly 2 free?
Poly 2 is free to download, with in-app purchases available.
Which has better reviews, Chladni Screen or Poly 2?
Poly 2 is rated higher. Chladni Screen averages 4.6 out of 5 from 81 ratings, while Poly 2 averages 4.8 from 686 ratings.
Do Chladni Screen or Poly 2 have ads?
Neither Chladni Screen nor Poly 2 shows ads.
Which is updated more often, Chladni Screen or Poly 2?
Chladni Screen ships an update every 8 months, and Poly 2 every 4 weeks. Most recently, Chladni Screen was updated on September 18, 2026 and Poly 2 on September 8, 2026.

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