# Ultimate Car Audio App — #1 Car Audio/Box Building App!

> Car audio design, wiring, tuning, and shop directory for enthusiasts and professionals. (iPhone/iPad app by Thomas VanSlambrouck.)

- Source: https://appshunter.io/ios/app/ultimate-car-audio-app/id1052058556 (this page in markdown: same URL + `.md`)
- Developer: [Thomas VanSlambrouck](https://appshunter.io/developer/1051372112)
- Category: Utilities, Productivity
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 4.20/5 from 79 App Store ratings · 59 written reviews indexed
- Age rating: 17+
- Requires: iOS 15.0 · 74 MB
- Languages: American English
- Released: 2015-11-13
- Data updated: 2026-08-06
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ultimate-car-audio-app/id1052058556/reviews.md

## What is Ultimate Car Audio App?

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.

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| UCAA Pro | $4.99 | one-time |
| UCAA Pro Legacy | $2.99 | one-time |
| Silver | $4.99 | one-time |
| Bronze | $1.99 | one-time |
| Diamond | $19.99 | one-time |
| Gold | $9.99 | one-time |


## Recent user reviews (10 of 59)

All indexed reviews: https://appshunter.io/ios/app/ultimate-car-audio-app/id1052058556/reviews.md

### 5/5 — A must for DIY car audio

*2026-06-19*

This app is great. It offers all kinds of design choices. However, I purchased this app and now I’m seeing ads. I’d like to see if I can have them removed as I shouldn’t have ads on an app I purchased that previously didn’t have ads.

### 5/5 — Awesome

*2026-05-13, version 8.5.5*

Great app for the beginner and pros! Absolutely a must have for anyone who wants a great multi functional car audio design app! JW.

### 2/5 — Meh

*2026-05-08, version 8.5.4*

Only 3 sub brands in the database

### 5/5 — Download now

*2026-04-21*

If ur a bass head and love car audio this is a must have app! I love it and recommend to any and everyone!

**Developer response:** Thank you! If you have any other thoughts, room for improvement, etc. please contact us at support@xplicittech.com! Much love from the UCAA team.

### 5/5 — Best box building app around

*2026-04-15*

Purchased this app before it went free about a year ago and have used it to build three different enclosures. All sounded great and got down just like I wanted them to. Good folks this is how honest they are. Since I paid $1.99 for the app before it went free they upgraded my plan to pro user unlocking tons of perks because they are solid folks. Y’all gotta try it out

**Developer response:** Thank you! If you have any other thoughts, room for improvement, etc. please contact us at support@xplicittech.com! Much love from the UCAA team.

### 4/5 — Now Ads

*2026-04-04*

Look I love the new update and all but the older vs that I PAID for didnt had no ads at the bottom of the screen that’s blocking the button fix it guys…

**Developer response:** Can you please shoot me an email and explain? You should have a pro version which has no ads. Please send a screenshot to support@xplicittech.com

### 2/5 — Great but could be better with a few tweaks.

*2025-06-05, version 7.5*

Love the app but I don't like how the cut sheet doesn't give port wall info on slot port and the 3d box is kinda pointless imo, electrical calculations are all over the place and inaccurate, hasn't been updated on apple in years but android gets frequent updates, but other than that it's good ig for simple box calculations and few other things but not much

### 3/5 — Update it plz

*2025-01-08, version 7.5*

Can you please get it update it been 3 year ago for apple update my buddy told me about this app and love it on android because it up to date but apple not

### 5/5 — The best I’ve played yet!

*2022-12-04*

So far only complaint is how hard and dense the game gets so fast. Legendary characters don’t come fast at all. However the game is the best I’ve played so far

### 1/5 — No sound

*2022-11-19, version 7.5*

The app just stopped working, every time I try to do a sweet or a tone burst nothing plays.. this needs fixed!!

## Frequently asked questions about Ultimate Car Audio App

### What does the Ultimate Car Audio App do?

The app serves as a comprehensive toolkit for car audio enthusiasts and professionals. It provides tools for designing speaker enclosures, calculating speaker wiring configurations, accessing databases of subwoofer specifications and amplifier performance, and finding local car audio installation shops.

### What are the key features of the app?

Key features include a box calculator for various enclosure types, a speaker wiring calculator to determine impedance, a cone area comparison tool, electrical calculators for power and wire sizing, tone generators for tuning, and databases for subwoofers and amp dyno results. It also includes a directory of car audio shops and learning resources like FAQs and tutorials.

### Is the app free to use?

Yes, the app is free to use and is updated regularly. There is an optional upgrade to UCAA Pro, which offers an ad-free experience across the entire application.

### Who is this app designed for?

This app is designed for car audio enthusiasts, installers, and professionals who need tools and information for designing, building, and tuning car audio systems. It also caters to shops and brands looking to increase their visibility.

### Can I find car audio shops using this app?

Yes, the app features a directory where you can find verified car audio installation shops. You can browse shops by their specialties, location, and contact information, making it easier to find professional help for your car audio needs.

## Version history (last 5 releases)

### 8.7.3 — 2026-07-29

UCAA 8.7.2 is The brand-analytics update.

Every brand page gets a new Sub Engagement dashboard: weekly and monthly sub views, top-performing subs, and box builds using your gear. Approved catalog subs auto-attribute to your brand — sign up years after the community added your subs and the full history still lights up.

BRAND PRO drilldown:
• Per-sub 90-day trend charts
• Discovery → Build conversion funnel
• Category benchmark vs the anonymized market median
• Rising sub detector
• Geographic breakdown
• Audience mix — Pro vs free vs anonymous
• Discovery surfaces — where viewers came from
• Community activity signals
• CSV export

Also new:
• Own more than one shop/brand/amp-repair page — request additional pages from My Pages
• All owned pages now appear on My Pages instead of only the first per type
• Pro cross-device preference sync (color theme, box finishes, favorites, advanced mode)
• Meta-style account switcher on login with per-card remove
• Dark mode on the login, register, and forgot-password screens
• Country field at signup, auto-filled from your timezone
• Tappable brand and series links on every subwoofer detail page
• Review analytics now shown to Brand Pro members
• Behind-the-scenes reliability improvements

UCAA 8.7.3 adds a social layer. Follow other users right from their public profile — follower and following counts show on every profile.

Every section of your profile is now individually hideable (last name, location, socials, join date, pages, achievements, published designs, subs) with a new "Followers only" tier that reveals content just to the accounts following you. Lock your profile down to just the essentials, or open specific sections only to your followers.

Photos attached to saved box designs also upload in a more efficient format now — noticeably smaller files and faster loads with no visible quality difference.

Plus various reliability and quality-of-life improvements.

### 8.7.1 — 2026-07-09

UCAA 8.7.1 — Personal Subs, Contributor Tiers, and Quick Access

Personal Subs
Save any custom or measured T/S parameter set privately. Keep them for
yourself, publish them to your public profile, or submit them to the shared
community catalog for review. Perfect for measured drivers, DIY builds, or
sub variants that aren't in the official database yet.

Contributor Tier Progression
Level up through Trusted, Contributor, and Curator as you contribute quality
entries. Each tier gives you higher daily submission limits and personal sub
quota bonuses. Every promotion earns an exclusive badge that stays on your
profile forever. A new Progression page shows exactly how close you are to
the next tier.

Quick Access
Long-press any calculator, FAQ, saved design, sub, page, or setting on the
Home page to pin it up top. Drag to reorder. Your most-used tools, one tap
away.

Everything else
- Every earned badge now fires a celebration, including tier and moderator
  badges
- Reviews you write now credit correctly toward review badges, and shop-owner
  5-star review badges are earnable
- Notification page gets filter chips to narrow by Subs, Tier, Feedback, or
  Unread
- Wiring diagrams now credit correctly on tablets
- Improved dark mode readability on Feature Requests pages
- Various reliability and quality-of-life improvements

### 8.7 — 2026-07-01

8.7.0 — Pick your style. Brace any side.

NEW
• App color themes (Settings → Appearance): 8 accent colors that compose with Dark Mode for 16 combinations.
• Box display settings: 13 finishes for the 3D viewer — 8 wood and 5 paint — with a separate interior finish override.
• Per-side extra baffles on all four box calculators (Pro): brace any side of the enclosure, not just the mounting side. Volume, cut sheet, and 3D render all update.
• 45° corner braces on the Sealed box calculator (Pro): toggle from Box Info, render in 3D, factored into net volume, fly out with Explode.
• Slot Port: pick where the slot exits when you build with 3 common walls. Tall and wide ports each get four placement options.
• Aero Port: place the port on the back wall and slide the cluster anywhere on the mounting wall with new offset sliders.
• Aero Port design checks: warnings for port-too-long, port cutout that doesn't fit, port body crossing sub mounting depth, and port flare slicing through perpendicular baffles.
• In-app bug report form on every box calculator — type, attach a screenshot, send. Box specs, app version, and device info attach automatically.
• Sweep Generator "Up & Down" mode for continuous, gapless ping-pong sweeps.
• View Public Profile pill on your profile — tap to see your profile the way other users see it.
• 20+ new FAQs across Thiele-Small parameters, Vehicle Electrical, Tuning & Sound Quality, and Installation.

UPDATED
• Sub Displacement field clarified — labeled "each" and total now correctly multiplied by sub count for multi-sub builds.
• Port velocity messaging on Slot and Aero is informational instead of a verdict — shows the number with context, acknowledges SPL tradeoffs.
• Improved Aero Port volume accuracy and net-volume math.
• Mounting-depth fit check uses the correct axis for sub orientation.
• Improved Kerf Calculator accuracy — cut count and spacing scale with wood thickness and bend angle.
• Smoother sub cutouts in the 3D viewer across all box calculators.
• 3D viewer remembers your camera angle and hidden panels while you tweak.
• Profile, Saved Designs, and Settings reorganized for less visual noise.
• FAQ index reorganized.

FIXED
• Various reliability and accuracy improvements across the box calculators.

### 8.6.5 — 2026-05-31

What's new in 8.6.5:

• ACCL Class Calculator — find your competition class from build location, clamped power, and cone area
• Update banner — know the moment a new version is in the store
• Ohms Law upgrade — enter any two of voltage, current, resistance, or power and the other two fill in automatically
• Resubmit a denied legacy Pro request directly from the app
• Rejection reasons now appear on denied pages, tester applications, and legacy Pro requests so you know what to fix
• Cleaner status labels in My Pages
• Fixed: metric, advanced mode, and keep-screen-on settings now persist across app launches
• Fixed: long page names and URLs no longer overlap the back button or run off-screen
• Various security and quality-of-life improvements

### 8.6.4 — 2026-05-25

What's new in 8.6.4:

• Amp Repair Tech Directory — find amplifier repair techs by location, mail-in availability, and whether they're currently accepting clients. Free for techs to list, free for users to find them.

• In-app repair request form — send a structured request with amp brand, model, symptoms, photos, and serial number. Pro repair techs receive a per-page inbox with status workflow, plus an email notification with reply-to forwarding so they can reply straight from their inbox.

• Amp Repair Pro subscription — repair techs can now upgrade their page directly from My Pages to unlock the request form, inbox, email notifications, and verified tech badge.

• Street Battles ST/SB Class Calculator — competition class lookup. Enter your subwoofer setup (3"–33") and see total cone area plus class placement.

• Long-form Rules section on organization pages — orgs can publish their full official rules right in the app, no PDF required.

• Share buttons on events, subwoofer + amp dyno entries, and brand/shop/org pages. Tapped share links now open the app directly to that page on phones with the app installed.

• Refreshed Terms of Service to cover the new Amp Repair Directory and the repair request flow.

• Various performance and reliability improvements.

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## More apps by Thomas VanSlambrouck

- [Xplicit Audio Shopping](https://appshunter.io/ios/app/xplicit-audio-shopping/id1557490545)

All apps by Thomas VanSlambrouck: https://appshunter.io/developer/1051372112

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*