# Woofer Box Calculator PRO vs Box Builder

The clearest difference is price: Box Builder at Free against Woofer Box Calculator PRO's $4.99. Box Builder also leads on update cadence (every 7 months vs every 18 months). Woofer Box Calculator PRO's advantage is iOS requirement (7.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Box Builder is free to download; Woofer Box Calculator PRO costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Woofer Box Calculator PRO ships an update every 18 months, Box Builder every 7 months. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Woofer Box Calculator PRO | Box Builder |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[3.2 (5 ratings)](https://appshunter.io/ios/app/woofer-box-calculator-pro/id887935204/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 41.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 4 MB | 1 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matjaz Marolt](https://appshunter.io/developer/874326830) | [Neill Mclachlan](https://appshunter.io/developer/1527884833) |

## What reviewers say

### Woofer Box Calculator PRO

[App page](https://appshunter.io/ios/app/woofer-box-calculator-pro/id887935204)

Design custom enclosures for car subwoofers with advanced calculations. This tool considers cabin gain, power compression, and port compression to predict final SPL. Save and load projects, drivers, and vehicles for easy management.

**Highlights:** Subwoofer enclosure design, Cabin gain consideration, Power and port compression, Predict final SPL, Gross volume handling, Vented enclosure calculation, Save and load projects

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

**In-app purchases:** none


### Box Builder

[App page](https://appshunter.io/ios/app/box-builder/id1640513711)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Woofer Box Calculator PRO free?

Woofer Box Calculator PRO costs $4.99, with no in-app purchases.

### Is Box Builder free?

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

### Do Woofer Box Calculator PRO or Box Builder have ads?

Neither Woofer Box Calculator PRO nor Box Builder shows ads.

### Which is updated more often, Woofer Box Calculator PRO or Box Builder?

Woofer Box Calculator PRO ships an update every 18 months, and Box Builder every 7 months. Most recently, Woofer Box Calculator PRO was updated on October 12, 2026 and Box Builder on October 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.*