# Gravity Machine vs Delay Line

The clearest difference is price: Delay Line at $1.99 against Gravity Machine's $9.99. Gravity Machine's advantage is iOS requirement (15.0 vs 17.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Gravity Machine costs $9.99 and Delay Line $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Gravity Machine against 5.0 for Delay Line. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

## The numbers

| Metric | Gravity Machine | Delay Line |
| --- | --- | --- |
| Price | $9.99 | **$1.99** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/gravity-machine/id6761209781/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/delay-line/id6776276739/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Paid | Paid |
| Size | 13 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Touchmachines](https://appshunter.io/developer/1887356152) | [Callback Audio, LLC](https://appshunter.io/developer/1896220942) |

## What reviewers say

### Gravity Machine

[App page](https://appshunter.io/ios/app/gravity-machine/id6761209781)

Create music by manipulating a miniature solar system. Fling orbs that bounce off walls, generating notes based on physics and chosen scales. Customize worlds, sounds, and tunings for unique generative compositions.

**Highlights:** Generative music creation, Physics-based orb interactions, Customizable scales and tunings, Multiple world shapes, AUv3 and standalone modes, MIDI output

**Features:** Vision Pro support

**In-app purchases:** none


### Delay Line

[App page](https://appshunter.io/ios/app/delay-line/id6776276739)

This audio effect app offers a high-quality digital delay with smooth parameter control for musical echoes. It's designed to add depth and space to your sound without unwanted noise.

**Highlights:** High-quality digital delay, Smooth parameter interpolation, Feedback control, Musical echoes, Linear interpolation for delay time, Comprehensive parameter smoothing

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Gravity Machine free?

Gravity Machine costs $9.99, with no in-app purchases.

### Is Delay Line free?

Delay Line costs $1.99, with no in-app purchases.

### Which has better reviews, Gravity Machine or Delay Line?

Gravity Machine and Delay Line are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Gravity Machine or Delay Line have ads?

Neither Gravity Machine nor Delay Line shows ads.

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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.*