Comparison

Ultimate Car Audio App vs Box Builder

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Ultimate Car Audio App

#1 Car Audio/Box Building App!

Free

🔧 Utilities

★ 4.279 ratingsView app →

About

Ultimate Car Audio App

This comprehensive toolkit assists car audio enthusiasts and professionals in designing enclosures, wiring speakers, and finding local shops. It offers various calculators, databases, and learning resources to enhance audio system setup and tuning.

Highlights

Box enclosure design calculator
Speaker wiring impedance calculator
Subwoofer and amplifier databases
Car audio shop directory
Tone generators for tuning
Educational tutorials and FAQs

Features

Read full description

UCAA — Ultimate Car Audio App is the all-in-one toolkit for car audio enthusiasts, installers, and professionals. Whether you're designing an enclosure, wiring speakers, or looking for a shop near you, UCAA has you covered. CALCULATORS & TOOLS - Box Calculator — Design sealed, ported, bandpass, and slot-ported enclosures - Speaker Wiring — Find the right impedance for any wiring configuration - Cone Area — Compare driver combinations (two 10s vs one 15, etc.) - Electrical Calculators — Power, wattage, and wire sizing - dB Power — Calculate sound pressure levels - Ohm's Law — Voltage, current, and resistance - Tone Generators — Test tones for tuning and rattle hunting DATABASES - Subwoofer Database — Thiele-Small specs and box recommendations for hundreds of drivers - Amp Dyno Results — Real-world power measurements vs. rated specs DIRECTORY - Find a Shop — Browse verified car audio installation shops with specialties, location, and contact info - Browse Brands — Discover car audio manufacturers and their profiles LEARN - FAQs — Common walls, HPF/LPF, subsonic filters, strapped amps, and more - Tutorials — Step-by-step how-to guides - Industry News — Latest car audio news from around the web UCAA PRO Upgrade to UCAA Pro for an ad-free experience across the entire app. FOR SHOPS & BRANDS Own a car audio shop or represent a brand? Create your page on UCAA and get discovered by enthusiasts in your area. Shop Pro members get enhanced visibility and a full gallery. Built for the community. Free to use. Updated regularly.

About

Box Builder

Features

Read full description

Tool to help determine box dimensions and pieces required for boxes of tube straightening rolls. Created by Jacob McLachlan (mclachlan.11@osu.edu) for Turner Machine Company.

Screenshots

Ultimate Car Audio App4 screens

Box Builder2 screens

Verdict

The call

The clearest difference is in-app purchases: Box Builder at none against Ultimate Car Audio App's 6. Ultimate Car Audio App's advantage is update cadence (every 3 days vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ultimate Car Audio App sells 6 one-off in-app purchases. Box Builder asks for nothing beyond the download.

UpkeepUpdate frequency

Ultimate Car Audio App ships an update every 3 days, Box Builder every 7 months. The most recent releases landed on September 13, 2026 and December 20, 2025 respectively.

Scorecard2 real differences · 8 level

Ultimate Car Audio App versus Box Builder: the parameters behind the verdict, then further details
Parameter	Ultimate Car Audio App	Box Builder
Price	Free	Free
Rating	4.2 (79 ratings) — better	—
Positive reviews	83.1% of reviews	—
Number of ratings	79 — better	—
Update frequency	Every 3 days — better	Every 7 months
Ads	No	No
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	15.0
Further details — not scored
Size	74 MB	1 MB
Age rating	17+	4+
Developer	Thomas VanSlambrouck	Neill Mclachlan

Bugs and requests

Ultimate Car Audio App

Reported bugs

7 issues

Ads appearing after purchase
No sound for tone burst or sweep
App stopped working
Cutout sheet not available
No preview for box design

Show 2 more

Electrical calculations inaccurate
App not updated on Apple for years

Requested features

13 requests

Remove ads from purchased app
Add more sub brands to the database
Include port wall info on cut sheets for slot ports
Improve 3D box feature
Fix inaccurate electrical calculations

Show 8 more

Update Apple version more frequently
Add information on 4th and 6th order walls or a dedicated wall tab
Add tutorial for wiring midrange and midbass speakers to a 4 channel amp
Update cutout sheet feature
Provide more exact cutout dimensions, especially for slot ports
Add comprehensive enclosure calculation based on TSPs
Include port dimensions on cut sheets
Add cutout dimensions to the app

Box Builder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Ultimate Car Audio App

One-time6

Bronze$1.99
UCAA Pro Legacy$2.99
UCAA Pro$4.99

Show 3 more

Silver$4.99
Gold$9.99
Diamond$19.99

None

Box Builder

No in-app purchases

Questions

Is Ultimate Car Audio App free?

Ultimate Car Audio App is free to download, with in-app purchases available.

Is Box Builder free?

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

Do Ultimate Car Audio App or Box Builder have ads?

Neither Ultimate Car Audio App nor Box Builder shows ads.

Which is updated more often, Ultimate Car Audio App or Box Builder?

Ultimate Car Audio App ships an update every 3 days, and Box Builder every 7 months. Most recently, Ultimate Car Audio App was updated on September 13, 2026 and Box Builder on December 20, 2025.