# Sub System vs Practice Games

The clearest difference is price: Practice Games at $9.99 against Sub System's $30.00. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Sub System costs $30.00 and Practice Games $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Sub System | Practice Games |
| --- | --- | --- |
| Price | $30.00 | **$9.99** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Monetization | Paid | — |
| Size | 48 MB | 31 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [sebastian rivas](https://appshunter.io/developer/506708461) | [重庆洪塔网络科技有限公司](https://appshunter.io/developer/1791673060) |

## What reviewers say

### Sub System

[App page](https://appshunter.io/ios/app/sub-system/id1533524994)

This app allows audio engineers and sound designers to visualize sound pressure levels and their interactions. Users can place virtual speakers and microphones, manipulate them with touch gestures, and observe colorful graphs of SPL and frequency response to understand acoustical summation.

**Highlights:** Virtual speaker placement, Sound pressure level visualization, Frequency response graphs, Virtual microphone simulation, Touch-based manipulation, Acoustical summation understanding

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

**In-app purchases:** none


### Practice Games

[App page](https://appshunter.io/ios/app/practice-games/id6753206649)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sub System free?

Sub System costs $30.00, with no in-app purchases.

### Is Practice Games free?

Practice Games costs $9.99, with no in-app purchases.

### Do Sub System or Practice Games have ads?

Neither Sub System nor Practice Games shows ads.

---

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