# Speaker Box Lite vs ForgePilot Diagnostics

The clearest difference is in-app purchases: ForgePilot Diagnostics at none against Speaker Box Lite's 3. ForgePilot Diagnostics also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Speaker Box Lite sells 3 in-app purchases, starting at $4.49 per 7 days. ForgePilot Diagnostics asks for nothing beyond the download.

Speaker Box Lite ships an update every 11 days, ForgePilot Diagnostics fortnightly. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Speaker Box Lite | ForgePilot Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (339 ratings)](https://appshunter.io/ios/app/speaker-box-lite/id898625526/reviews)** | — |
| Number of ratings | **339** | — |
| Positive reviews | 61.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 11 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 166 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexey Abdulin](https://appshunter.io/developer/893545070) | [Crimson Forge Inc](https://appshunter.io/developer/1896609772) |

## What reviewers say

### Speaker Box Lite

[App page](https://appshunter.io/ios/app/speaker-box-lite/id898625526)

Calculate subwoofer box volumes and design acoustic systems with detailed charts and parameter generation. Supports various enclosure types and includes a shared online speaker database. Offers cloud project saving and PRO features via subscription.

**Highlights:** Subwoofer box volume calculation, Support for multiple enclosure types, Amplitude, phase, and SPL charts, Parameter generation for vented boxes, Port and displacement volume calculation, Cloud project saving, Shared online speaker database

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week PRO | $4.49 | per 7 days |
| Month plan | $7.99 | per month |
| PRO Account | $8.99 | per month |

**What reviewers like**

- 📊 Comprehensive graphing and visualization tools
- 💾 Extensive speaker driver database with TS parameters
- 📐 Accurate enclosure calculations for sealed and ported boxes
- ✂️ Automatic cut list generation for DIY building
- 💡 Intuitive interface for beginners and experts

**What reviewers complain about**

- 💰 Expensive subscription model ($5-7/month or 400 rubles)
- 🚫 Limited free version functionality
- 🐛 Frequent crashes and stability issues
- ❌ Inconsistent calculation accuracy
- 🔐 Billing/subscription verification problems

**Reported bugs**

- App crashes when adjusting VB/FB parameters
- Crashes on certain parameter combinations requiring reinstall
- Drawing/3D model generation hangs indefinitely
- Subscription payment charged multiple times
- Pro version access denied despite active payment

**Requested features**

- One-time purchase option instead of subscription
- Portuguese language support (PT-BR)
- Air velocity graphs
- Complete 3D model generation with final drawings
- Bandpass 4th order enclosure support


### ForgePilot Diagnostics

[App page](https://appshunter.io/ios/app/forgepilot-diagnostics/id6768842315)

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

**In-app purchases:** none


## Frequently asked questions

### Is Speaker Box Lite free?

Speaker Box Lite is free to download, with in-app purchases available.

### Is ForgePilot Diagnostics free?

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

### Do Speaker Box Lite or ForgePilot Diagnostics have ads?

Speaker Box Lite shows ads; ForgePilot Diagnostics does not.

### Which is updated more often, Speaker Box Lite or ForgePilot Diagnostics?

Speaker Box Lite ships an update every 11 days, and ForgePilot Diagnostics fortnightly. Most recently, Speaker Box Lite was updated on October 7, 2026 and ForgePilot Diagnostics on October 5, 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.*