# Planet Gravity vs Silly Sound Maker

The clearest difference is review sentiment: Silly Sound Maker at 75% against Planet Gravity's 25%. Silly Sound Maker also leads on iOS requirement (14.0 vs 17.6). Planet Gravity's advantage is price (Free vs $0.99). On update cadence, ads, in-app purchases and device support there is nothing between them.

Planet Gravity is free to download; Silly Sound Maker costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Planet Gravity ships an update every 14 months, Silly Sound Maker every 26 months. The most recent releases landed on June 7, 2026 and August 3, 2026 respectively.

## The numbers

| Metric | Planet Gravity | Silly Sound Maker |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/silly-sound-maker/id1528862555/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 25.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 26 months |
| Monetization | **Free** | Paid |
| Size | 5 MB | 1 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Niagara Mobile LLC](https://appshunter.io/developer/1039399999) | [Michael Gruenthal](https://appshunter.io/developer/453595749) |

## What reviewers say

### Planet Gravity

[App page](https://appshunter.io/ios/app/planet-gravity/id995682820)

Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.

**Highlights:** Select different planets for unique gravity, Observe pendulum collisions, Physics-based simulation, Educational planet facts, Interactive entertainment

**Features:** macOS Compatibility

**In-app purchases:** none


### Silly Sound Maker

[App page](https://appshunter.io/ios/app/silly-sound-maker/id1528862555)

Easily record your voice or any sound and then manipulate its speed and pitch by simply dragging a circle on the screen. This application offers a fun and intuitive way for users of all ages to create unique audio effects.

**Highlights:** Record sounds, Change speed, Alter pitch, Intuitive drag interface, Fun for all ages

**In-app purchases:** none


## Frequently asked questions

### Is Planet Gravity free?

Planet Gravity is free to download, with no in-app purchases.

### Is Silly Sound Maker free?

Silly Sound Maker costs $0.99, with no in-app purchases.

### Do Planet Gravity or Silly Sound Maker have ads?

Neither Planet Gravity nor Silly Sound Maker shows ads.

### Which is updated more often, Planet Gravity or Silly Sound Maker?

Planet Gravity ships an update every 14 months, and Silly Sound Maker every 26 months. Most recently, Planet Gravity was updated on June 7, 2026 and Silly Sound Maker on August 3, 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.*