# S4_control vs Subwoofer Box Calculator

The clearest difference is ads: S4_control at none against Subwoofer Box Calculator's shown. S4_control also leads on iOS requirement (9.0 vs 16.4). Subwoofer Box Calculator's advantage is update cadence (every 3 weeks vs every 9 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

S4_control ships an update every 9 months, Subwoofer Box Calculator every 3 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | S4_control | Subwoofer Box Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Size | 108 MB | 50 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GUANDDONG TIANPU TECHNOLOGY GROUP CO.,LTD.](https://appshunter.io/developer/1637560013) | [Sahar Yehezkel Avraham](https://appshunter.io/developer/6800669429) |

## What reviewers say

### S4_control

[App page](https://appshunter.io/ios/app/s4-control/id6532592331)

**Features:** macOS Compatibility

**In-app purchases:** none


### Subwoofer Box Calculator

[App page](https://appshunter.io/ios/app/subwoofer-box-calculator/id6802809852)

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

**In-app purchases:** none


## Frequently asked questions

### Is S4_control free?

S4_control is free to download, with no in-app purchases.

### Is Subwoofer Box Calculator free?

Subwoofer Box Calculator is free to download, with no in-app purchases.

### Do S4_control or Subwoofer Box Calculator have ads?

Subwoofer Box Calculator shows ads; S4_control does not.

### Which is updated more often, S4_control or Subwoofer Box Calculator?

S4_control ships an update every 9 months, and Subwoofer Box Calculator every 3 weeks. Most recently, S4_control was updated on October 10, 2026 and Subwoofer Box Calculator on October 25, 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.*