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

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.

8.6.3 — Port velocity rewrite + Cone Area overhaul • Accurate peak port velocity at tuning frequency — full Thiele-Small alignment math that accounts for Helmholtz resonance. Auto-tiers based on the driver parameters you provide. • Optional Re, BL, Mms, and Power-per-sub fields unlock power-exact port velocity at any wattage, with a warning if power would exceed the cone's safe maximum. • Unified Cone Area Calculator — compare up to six setups side by side, add or remove sets on the fly, sortable comparison bars. • Round or Square cone shape per set — L7-style square subs now supported. • Smarter "port too long" guidance shows the max length your geometry can fit and which box dimension is the bottleneck. • Expanded FAQs covering port velocity, motor parameters, end correction, and Xmax-limited power. • Numeric inputs now auto-select their zero default — typing replaces it cleanly. • Various reliability improvements.

Got an idea for the app? Now you can pitch it. The new Feature Requests board lets you suggest features, upvote what you want next, and follow along as ideas move from Open to Shipped. Find it under Community in the side menu. Six new badges for shipped ideas, upvotes, and comments. Plus the aero box calculator gets real-time placement checks — no more guessing if your port fits — and the flipped-mount port now sits the way you'd actually build it.

Square sub cutouts with adjustable corner radius on every box calculator. New aero port 3D rendering — pick flared or tube, place the port on the front, top, left, or right wall, and slide it externally through the wall. Plus a fix for users who had trouble getting past the updated Terms of Service.

Make UCAA your own — 8.6 brings public profiles and design sharing! WHAT'S NEW • Your own public profile at caraudioapp.com/u/(your-handle) with bio, avatar, location, socials, achievements, and stats • Per-field privacy controls — choose what's public, private, or visible to other users • Share any saved box design with a link — friends can view dimensions, photos, and notes, and save a copy to their own library • Pro: Publish designs to your profile with an auto-generated branded card showing the 3D render, design name, and key specs • Steam-style achievements page with earned and in-progress sections, plus per-badge progress bars • Avatar uploads with native photo cropping • Settings reorganized into 6 focused sub-pages (Profile & Privacy, Notifications, Display, Data Usage, Account & Security, About) • Faster profile loading and avatar caching • Various calculator accuracy improvements and other polish Get started: Settings → Profile & Privacy to pick your handle.

8.5.5 — Save Details Your saved box designs just got way more useful. You can now tag any save with: — The subwoofer it's built for (autocomplete from the sub database, or type your own) — RMS power per sub — Target use: SPL, SQ, Daily, Custom — pick one or stack them — Build notes — Up to 4 photos (Pro) When you pick a sub from the database, loading that design later pre-fills the calculator with its T/S parameters and tuning recommendations. No more guessing which sub you built that box for six months ago. Plus profile bios, an option to keep photo uploads on Wi-Fi only, and various improvements throughout.

8.5.4 makes the subwoofer database actually useful. Pick a sub, tap "Build a Box", and your slot, aero, sealed, or wedge calculator pre-fills with displacement, T/S parameters, mounting depth, and the manufacturer's recommended tuning. As your design changes, recommendation warnings flag when volume, port tuning, or mounting depth drift outside spec. • Free-text search in the subwoofer database • One-tap link from any sub to any box calculator • Volume / tuning / mounting-depth warnings (15% threshold) • Multi-angle 3D in PDF export — hero render, front/top thumbnails, side-by-side build summary + exploded view • More T/S parameters on every sub (Sd, derived Sens 2.83V/1m, Rms, Klippel extended) • Fixes for 3D rendering on dimension changes, save/load behavior, and per-sub volume warnings

NEW • Shareable PNG export — modern card layout with the 3D render and key specs, built for social media (Pro) • Redesigned PDF export — workshop-grade spec sheet with stat tiles, larger 3D preview, and sectioned spec cards (Shop Pro) • New Performance Analysis page in the PDF — port velocity bar and frequency response curve • Real port velocity calculation on slot and aero calcs — enter driver Sd and Xmax for true m/s readout (Advanced Mode) • Driver T/S parameter inputs on slot and aero calcs — power an accurate Thiele-Small frequency response curve • Sd (effective cone area) added to the Thiele-Small Parameters FAQ IMPROVED • Cut sheet count now reflects the actual nested layout • Frequency response chart applies recommended HPF/LPF with markers • Sharper 3D previews with transparent backgrounds • Cleaner spec sheet sub-header FIXES • Analytics now gate per-page tier • Beta testers can see Shop, Brand, and Business Bundle options on the Go Pro page • Upgrade prompts now adapt to the page type (Shop, Brand, or Org)

8.5.2 — Sealed Wedge Calc, Smarter Tone Generators, and Open Directories NEW • Sealed Wedge box calculator — front-slanted enclosure design with full 3D preview, cut sheet, save/load, and PDF export. Built for shop-grade accuracy. • Custom tone generator presets (Pro) — save up to 10 of your own test frequencies on the Subwoofer and Full-Range generators, or full sweep configurations on the Sweep generator. Tap once to load, tap Edit to remove. • Tone generators now remember your last settings between sessions — frequency, volume, and waveform on the Subwoofer and Full-Range generators, plus start, end, duration, volume, and loop on the Sweep generator. • Inline suggestions on the slot port calculator when port dimensions don't match the box geometry. • Recommended port-area-per-volume range now displays under the result on the slot and aero calculators when your design falls outside the typical range. • Browse Shops, Brands, Events, and Organizations without needing to sign in — perfect for sharing links to your business or upcoming show. IMPROVED • Resonant frequency accuracy on the sealed and sealed wedge calculators. • Tuning frequency accuracy on the aero port calculator in metric mode. • Port area display in metric mode on the slot, aero, and T-line calculators. • Refined port-area-per-volume warning thresholds in metric mode. • Cleaner bottom spacing across the app — no more content cut off behind the banner ad. FIXES • Resolved an issue preventing image uploads on shop, brand, and event pages. • Bug Hunter badge celebration only fires once per badge now. Plus an updated Terms of Service to cover the Events and Organizations directories — you'll be prompted to review and re-accept.

8.5.1 brings post-as-shop/brand events, Pro analytics for events, free-tier improvements, and four box-calc fixes. What's new: • Post events as your shop, brand, or org — they show up on that page automatically • Shop & Brand Pro: new Event Activity dashboard with views, RSVPs, and engagement • Pro shops & brands now featured at the top of their directories with a PRO badge • Bug Hunter badge — earn an exclusive badge when you report a bug we fix • Duplicate an event — quickly create next year's version of the same show • Event countdown badge — "Starts in N days" / "Tomorrow" / "Today" • Organization pages now show sanctioned event types, rulebook, and regional chapters • Tap an org chip on an event to jump to its page Free upgrades: • Business hours now free for all shops • 3 specialties (was 1) and pick any 1 social link (was Facebook only) Plus four box-calc fixes including a metric-tuning correction and a Sub Up/Back toggle that could get stuck. Thanks to everyone who reported these!

8.5.0 — Events & Organizations Car audio shows, meets, and competitions now have a home in UCAA. What's new: • Events directory — browse upcoming and past events with filters for state, organization, and event type • RSVP system — mark yourself Going or Interested and see who else is coming • Post your own events — free users can post 1 active event at a time, Pro users get unlimited • Organizations directory — browse MECA, IASCA, dB Drag and other sanctioning bodies • Add to Calendar — export any event to Apple Calendar, Google Calendar, Outlook, or any calendar app • Share events with friends via Messages, email, or social • Event analytics dashboard for organizers — views, RSVP counts, engagement, and attendee lists • Privacy control for RSVPs — choose whether other users see your name on attendee lists • Notifications for cancellations and 24-hour reminders before events you're attending • Active event editing — owners can update their live events (changes trigger a quick admin re-review) Plus polish and fixes throughout.

What's New in 8.4.4: Dynamic wiring diagrams — visualize your SVC and DVC speaker wiring configurations with color-coded interactive diagrams Save diagrams as images to share or reference later Faster loading — your profile now loads instantly, even with a slow connection Expanded Net Volume FAQ with detailed explanations of cutout, displacement, bracing, and baffles Bug fixes for wiring calculator edge cases and admin panel layout

- Request Legacy Pro — if you purchased UCAA before it went free, submit a request from your profile to receive free Pro access until March 2027 - Panel visibility — tap the eye icon on any 3D box preview to show or hide individual walls and see inside your enclosure - Port length warning — slot port calculator now warns you when your port is too long to fit inside the box - Fixed slot port 3D explode view — all port walls now fly apart and reassemble correctly - Improved Pro purchase reliability - Bug fixes and UI improvements

8.4.2 — Shop Reviews, Account Deletion & ATT NEW: • Shop reviews — leave star ratings, write reviews, and upload a photo for shops you've visited • Rating breakdown chart with tap-to-filter by star level • Sort reviews by Newest, Oldest, Highest, or Lowest • Shop owners can respond to reviews directly • Shop owners receive in-app notifications for new reviews • Pin a review to the top of your shop page (Shop Pro) • Review analytics in the Pro dashboard with rating breakdown • Add Google Reviews and Yelp links to your shop page (Shop Pro) • Sort shops by Highest Rated in the directory • Reviewer badges — earn badges for writing reviews • Shop owner badges — earn badges for receiving 5-star reviews • In-app account deletion from Privacy & Security • App Tracking Transparency prompt before ads are shown IMPROVED: • Shop and brand pages now use a blue color scheme • Reviews can be edited at any time • Shop/brand page creation buttons now describe which to pick • Terms of Service updated (v1.3.0)

NEW: • Tip Jar — support the developer with Bronze, Silver, Gold, or Diamond donations • Supporters Wall — see who's helping keep UCAA alive, organized by tier • 4 exclusive supporter badges unlocked by donating at each tier • Early Supporter badge for users who purchased the app before it went free • Privacy toggle — choose to show your name on the supporters list or stay anonymous • "Support the Dev" link on your Profile page IMPROVED: • Legacy Pro card now appears higher on the Go Pro page with a "Lock in Pro for $2.99" button • Legacy Pro users see a "Legacy Pro" badge on their Pro Membership page FIXED: • Pro purchases now sync immediately — no more needing to restart the app after buying • If the initial Pro activation fails, the app retries automatically • Signing up with an email already used via Google/Apple now shows a helpful message instead of a fake confirmation • Social sign-up (Google/Apple) now properly shows the profile completion screen

8.3.7 — Legacy User Support • Users who purchased UCAA before it went free now automatically receive 1 year of Pro • Improved Pro purchase activation reliability

This update brings the biggest changes in UCAA's history — the app was completely rebuilt from the ground up with a brand new framework, and packed with major new features across every version since 7.5. NEW FEATURES • UCAA Pro — upgrade in-app for an ad-free experience, unlimited saved designs, cloud sync, advanced mode, and 3D explode view • Shop & Brand Directory — find car audio installation shops and browse manufacturers near you • Shop & Brand Pages — businesses can claim a page with photos, logo, contact info, and specialties • Amp Dyno Database — real-world dyno results from AD-1 Certified testers • Dyno Tester Profiles — tap any tester's name to view their public profile and recent tests • 3D Box Rendering — real-time 3D view of your enclosure with rotate, move, and explode-view • Cut Layout PDF — sealed and slot-ported box exports now include an optimized plywood cut layout on standard 4'×8' sheets • Save/Load Designs — save and reload sealed, aero ported, and slot-ported box designs • Dark Mode — toggle in Settings, preference saved across sessions • Global Units Setting — switch between imperial and metric once, applies everywhere • Tone Generator dB Levels — choose between 0, -5, -10, and -15 dB output • Changelog & Version History — see exactly what changed with each update • Pro Seat Grants — Shop Pro owners can grant 1 UCAA Pro seat; Brand Pro owners can grant up to 3 • App ID — a shareable identifier on your Profile page so page owners can invite you to a Pro seat • Pro Seat Invites — accept or decline pending seat invites from the top of My Pages • Waveform selector on the subwoofer and full-range tone generators (Sine, Square, Sawtooth, Triangle) • Frequency presets on tone generators for quick one-tap tuning • Step size toggle on the full-range generator (10 Hz / 100 Hz / 1 kHz) • Sweep generator loop mode and live frequency/elapsed time display • Terms of Service page IMPROVEMENTS • Subwoofer database now includes additional Thiele-Small parameters (Sd, Rms, sensitivity, advanced impedance values) • Port dimension mismatch indicator — highlights mismatched port values to catch entry errors • Slot port PDF export now shows net volume and tuning frequency • Box overview shows sub quantity and dimensions • Numerous performance, stability, and security improvements • Tone generators now work when the iOS silent/ringer switch is on • Tone generators stop automatically when navigating away

- New Feature - Sweep generator - New Feature - DIY Lithium Calc - New Feature - Debug screen - New Feature - 'Generalized' 3d Box Layout - New Feature - 'Cutout diameter' to box calcs (improved accuracy) - New Feature - 'Number of subs' to box calcs (improved accuracy) - Update - Main menu layout - Fix - Gross volume showing net volume - Fix - Sealed box calc asking for port orientation - Probably more, I'm bad at documenting

- UI Updates. Fixed hard to read font - Re-implemented cut sheets. Tested with Bassahaulics designs, but please test and give feedback. - Reworked tone generator. Split into two. Added slider - Added sealed wedge box calc - Kerf Calculator (please report bugs to thomas@xplicitcoding.com) - Fixed wiring diagram inaccuracies - Small bug fixes

The new update will have a fresh new look, speed improvements on iOS (specifically when clicking a button there is less delay), new icon to separate it from anything "Xplicit" related (trying to advertise a separate entity) and include features such as: Wire Wattage Calculator - calculates the recommended wire based on amperage, length and cable type as well as number of runs Cone Area Comparison - compares the cone area of 2 scenarios (4 15s vs 6 12s for example)

Updated Supporters of the App Added single digit adjustment to tone generator Added FAQs Added dB Power Calculator Added "number of amps" option to speaker wiring Added speaker wiring diagrams Updated Electrical Needed calculator to specify battery types Added box tuning equation on box calc pages Removed cutout sheet until further notice

Bug fixes