# Gravity Zen vs Polyrhythm

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.

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 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Gravity Zen | Polyrhythm |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (70 ratings)](https://appshunter.io/ios/app/gravity-zen/id1602081846/reviews)** | [2.1 (9 ratings)](https://appshunter.io/ios/app/polyrhythm-relaxing-sounds/id6462398544/reviews) |
| Number of ratings | **70** | 9 |
| Positive reviews | **93.8% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 13 MB | 131 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dominik Hauser](https://appshunter.io/developer/325836858) | [Stanislav Duplinskiy](https://appshunter.io/developer/1529735040) |

## What reviewers say

### Gravity Zen

[App page](https://appshunter.io/ios/app/gravity-zen/id1602081846)

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.

**Highlights:** Gravity field simulation, Add multiple objects, Observe stable configurations, Interactive physics, Minimalist design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Large tip | $2.99 | one-time |


### Polyrhythm

[App page](https://appshunter.io/ios/app/polyrhythm-relaxing-sounds/id6462398544)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full access to app functions | $1.99 | per 7 days |
| Full access to app functions | $5.99 | per month |
| Full access to app functions | $12.99 | per 3 months |


## Frequently asked questions

### Is Gravity Zen free?

Gravity Zen costs $0.99, and also offers in-app purchases.

### Is Polyrhythm free?

Polyrhythm is free to download, with in-app purchases available.

### Which has better reviews, Gravity Zen or Polyrhythm?

Gravity Zen is rated higher. Gravity Zen averages 4.8 out of 5 from 70 ratings, while Polyrhythm averages 2.1 from 9 ratings.

### Do Gravity Zen or Polyrhythm have ads?

Neither Gravity Zen nor Polyrhythm shows ads.

### Which is updated more often, Gravity Zen or Polyrhythm?

Gravity Zen ships an update every 9 days, and Polyrhythm every 5 weeks. Most recently, Gravity Zen was updated on October 30, 2026 and Polyrhythm on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*