Comparison

Polyrhythm vs Pendulum Wave 3D

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

Head to head
About

Polyrhythm

Create a personalized soundscape for relaxation, sleep, or meditation. Explore a variety of organic and synthesized instruments, ambient background sounds, and AI-generated presets. Customize and save your favorite sound combinations for a tranquil experience.

Highlights
  • Variety of sound presets
  • Organic and synthesized instruments
  • Background ambient sounds
  • AI preset generator
  • Advanced preset customization
  • Create and save custom presets
Features
Read full description

When it's time for rest and relaxation, our app will become your faithful companion. Perfect for use before sleep or during meditation, it can also help soothe your child or yourself. Based on polyrhythmic sound playback, our app promises a deep immersion into the world of sounds and visualizations. Features of our app: - A variety of presets with unique moods; - Various organic and synthesized musical instruments to create the perfect atmosphere; - Background sounds including white noise, bird songs, and ocean waves; - AI preset generator for a continuous flow of inspiration; - Advanced preset customization for precise sound tuning; - Ability to create custom presets and save them to favorites. Discover the world of harmony and tranquility with our unique app - your personal oasis of calm. Also worth reading Privacy Policy: https://sites.google.com/view/castles-trip-privacy-policy. And Terms of use: https://sites.google.com/view/polyrhythm-tos

About

Pendulum Wave 3D

Features
Read full description

Eighteen pendulums, released at the same instant. A perfect line for a moment — then a wave, a fold, then no pattern at all. Sixty seconds later, a perfect line again. None of that is luck. Every pendulum is given a length that makes it swing an exact whole number of times per cycle, so the scattered part was never really a mess. It was the middle of a return. It is not a looping video, and not an animation faked to look about right. It is a live physics simulation, computed frame by frame while you watch. NOBODY WROTE THE MUSIC Turn the sound on, and each pendulum rings a note once per full swing, as it crosses the bottom — higher for the short ones, lower for the long ones. Only five notes of the scale are used (do, re, mi, so, la), spread across octaves, so they stay clear no matter how many sound at once. There is no composer here. The lengths are the melody. The moment everything lines up is the quietest one — all eighteen are at the far end of their arc, none of them crossing the bottom. A breath later, eighteen notes come down in a run, high to low, in under a fifth of a second. You are hearing exactly what you are watching. ANY ANGLE YOU LIKE Drag to put the camera anywhere. From an angle, a row of swinging pendulums. From directly above, a wave running along the row. The motion never changes. The angle does all the work. Four layouts: a straight Line; a Circle, where the wave travels around the ring; a Spiral winding outward; and a Grid, where the swing spreads like woven mesh — the more pendulums you add, the clearer the weave. Four color themes — Cool, Neon, Mono, Sunset. The bobs glow softly. Turn on Light trails in the Display panel, and each one leaves a line of light hanging in the air behind it. CINEMA MODE One tap: the controls disappear, the camera begins a slow orbit, and the ad goes with them. A waiting room screen, a tablet on the edge of a desk, a dark room late at night. It becomes something to look at, and nothing else. ALSO INSIDE • Set the number of pendulums, the cycle length, the swing angle and the speed • Save any setup you like as a preset • A data panel listing every pendulum's swings, length and period • "How it works" — the real explanation, in plain words, no equations • Available in 33 languages • No account, no sign-in. iPhone and iPad ABOUT THE ADS The app is free. There is one small banner at the bottom of the screen — no full-screen ads, no video ads — and in Cinema mode even that banner disappears. Ads are never personalized. The app itself never asks for your name or email. To show the banner, Google AdMob uses standard advertising data (an advertising identifier and approximate location derived from your IP). See our Privacy Policy for details. Don't stop watching while it is scattered. Stay until it lines up again.

Screenshots

Polyrhythm4 screens
Pendulum Wave 3D4 screens

Verdict

The call

The clearest difference is in-app purchases: Pendulum Wave 3D at none against Polyrhythm's 3. Pendulum Wave 3D also leads on update cadence (every 10 days vs every 5 weeks). Polyrhythm's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support 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

Both are free to download. Polyrhythm sells 3 in-app purchases, starting at $1.99 per 7 days. Pendulum Wave 3D asks for nothing beyond the download.

UpkeepUpdate frequency

Polyrhythm ships an update every 5 weeks, Pendulum Wave 3D every 10 days. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
Polyrhythm versus Pendulum Wave 3D: the parameters behind the verdict, then further details
ParameterPolyrhythmPendulum Wave 3D
PriceFreeFree
Rating2.4 (7 ratings) — better—
Positive reviews25.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 5 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size131 MB10 MB
Age rating4+4+
DeveloperStanislav DuplinskiyTakashi Nemoto

In-app purchases

3 purchases

Polyrhythm

Subscriptions3
  • Full access to app functions$1.997 Days
  • Full access to app functions$5.991 Month
  • Full access to app functions3 Days trial$12.993 Months
None

Pendulum Wave 3D

No in-app purchases

Questions

Is Polyrhythm free?
Polyrhythm is free to download, with in-app purchases available.
Is Pendulum Wave 3D free?
Pendulum Wave 3D is free to download, with no in-app purchases.
Do Polyrhythm or Pendulum Wave 3D have ads?
Neither Polyrhythm nor Pendulum Wave 3D shows ads.
Which is updated more often, Polyrhythm or Pendulum Wave 3D?
Polyrhythm ships an update every 5 weeks, and Pendulum Wave 3D every 10 days. Most recently, Polyrhythm was updated on October 12, 2026 and Pendulum Wave 3D on October 16, 2026.

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