Gravity Zen vs Polyrhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gravity Zen
Observe small circles interacting with a central gravity field. Add numerous boxes to explore how they naturally settle into a stable arrangement. It's a simple yet captivating simulation.
- Gravity field simulation
- Add multiple objects
- Observe stable configurations
- Interactive physics
- Minimalist design
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Watch small circles move around a central gravity field. Add as many boxes as you like. Explore how they find a "stable" configuration by themselves.
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.
- Variety of sound presets
- Organic and synthesized instruments
- Background ambient sounds
- AI preset generator
- Advanced preset customization
- Create and save custom presets
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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
Screenshots
Verdict
The clearest difference is review sentiment: Gravity Zen at 94% against Polyrhythm's 25%. Gravity Zen also leads on rating (4.8 vs 2.1) and update cadence (every 9 days vs every 5 weeks). Polyrhythm's advantage is price (Free vs $0.99) and iOS requirement (12.0 vs 15.0). On ads, in-app purchases 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
Polyrhythm is free to download; Gravity Zen costs $0.99 up front. Gravity Zen sells 2 one-off in-app purchases and Polyrhythm sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Gravity Zen holds the better App Store score, 4.8 against 2.1. That said, the two scores are not equally well evidenced: Gravity Zen has 70 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 94% of Gravity Zen's written reviews are positive against 25% of Polyrhythm's.
Gravity Zen ships an update every 9 days, Polyrhythm every 5 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Gravity Zen | Polyrhythm |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.8 (70 ratings) — better | 2.1 (9 ratings) |
| Positive reviews | 93.8% of reviews — better | 25.0% of reviews |
| Number of ratings | 70 — better | 9 |
| Update frequency | Every 9 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 131 MB |
| Age rating | 4+ | 4+ |
| Developer | Dominik Hauser | Stanislav Duplinskiy |
Customer experience
Gravity Zen
Polyrhythm
In-app purchases
Gravity Zen
- Small Tip$0.99
- Large tip$2.99
Polyrhythm
- 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
Questions
Is Gravity Zen free?
Is Polyrhythm free?
Which has better reviews, Gravity Zen or Polyrhythm?
Do Gravity Zen or Polyrhythm have ads?
Which is updated more often, Gravity Zen or Polyrhythm?
Other comparisons
