3DCDesign
iOS Android Live
Print-shop organizer for makers — printer profiles, jobs, materials, estimates, and reports, kept local rather than in a cloud service.
Big Bwain LLC · Founded 2024
We build apps, web platforms, and physical products — end to end.
Our own catalog of 20 projects is the proof: we build and operate every one.
Products we build and operate
Mobile apps, browser games, desktop tools, and physical designs. Explore the work, see the actual interfaces, and check each product’s availability.
Featured products
Your Whey Fitness
iOS Android Live
Offline-first workout tracker — sessions, history, stats, and local backup, rebuilt on MAUI and shipped to iOS and Android, with a web workspace for trainers and gyms: Teams, Locations, classes, and waivers.
Adventure Cache
iOS Android Live
Geocaching and exploration companion — create adventures, hide caches, log finds, and earn badges.
More live products
3D Design & Physical Products
Physical products Live
Digital designs and physical prints for model railroading, functional tools, geocache containers, device mounts, and maker accessories. Selected designs have sold both as downloadable files and as finished physical prints.
Cache Pal
Web PWA Live
An offline-first virtual-pet world of creature care, discovery, battles, breeding, and minigames, with a home to decorate and a world to explore. Plays in the browser and installs as an app.
Cache Creature
iOS Android Web Live
A local-first creature-card collection built from moments, signals, prompts, and scans, with a public web dashboard and a three-card practice arena.
Rubetris
Web iOS Android Live
Three gem-cutting puzzle games for web, iOS, and Android: fill lines from four walls in Debrix, rotate gem clusters in Rosette, and stack the well in Erikade.
Keydial Commander
Open source Live
Turns the Huion Keydial Mini (K20) into a Stream-Deck-style macro pad on Linux — remap all 18 keys and the dial to shortcuts, chords, macros, app launches, and profile switches.
Earl's Trains
Website Live
A family archive website for a lifelong O-gauge layout builder: more than sixty years of layouts, rail outings, photography, and films.
Live railway archive · October 2026
City Jumper
Web Live
A rooftop arcade game for the browser: master eight City Rush districts, take on the shared Daily Rush, explore creator maps, and chase the next clean run. Free to play, with no ads.
Tattoo Finder
Web iOS (private testing) Android Live
A tattoo discovery and booking platform connecting adults with artists through portfolios, private conversations, offers, and appointments. Available on the web and Android; the iOS app remains in private testing.
Guidlands Watch
Wear OS watchOS (in review) Live
A standalone fantasy adventure for your wrist: seeded expeditions, tactical battles, loot, and gear, playable offline. Available on Wear OS; the Apple Watch version is in review.
CachePal: Watch Pet
watchOS (in review) Wear OS Live
A native virtual pet for your wrist: hatch a pixel Pal, care for it, explore 14 species, and play Cache Catch. Available on Wear OS; the Apple Watch version is in review.
In development
Cacheboard
Local web app In development
A private, local-first workbench for running AI coding agents across a multi-product software portfolio: which account has capacity, what to work on next, and whether a task can be delegated and reviewed safely.
Local demonstration workspace · generic fixture tasks
Guidlands
Web In development
A browser MMORPG built around lands that come and go: explore, fight, trade, and craft while keeping your wanderer’s progress across each new adventure. Playable on phone and desktop, with development continuing.
Wordsracer
Web In development
Two word games in one place: guess the five-letter word in Arena, solo or racing friends, or find the words hidden in a tray of letters in Word Garden.
Doodle Bluff
Web In development
A phone-first drawing and bluffing party game where players sketch prompts, invent decoy captions, vote, and reveal the funniest deceptions.
Model Scout
Open source In development
A local Windows workbench for finding, previewing, and organizing 3D models: cached galleries, multi-part collections, exact duplicate checks, print-cost estimates, and reviewed file transfers.
Model Scout 0.4.1 · demonstration library of six public designs
Pocket Words
Android In development
A calm, offline five-letter word game for Android: six guesses, unlimited replay, automatic save and restore, and clear feedback that uses symbols as well as color.
Android development build · game board and appearance settings
Experiments
Ruby Moon
Xteink X4 Experiment
A Moon-themed learning companion for the Xteink X4 e-paper reader, with signed firmware, learning content, and updates confirmed by a grown-up on the device.
Firmware simulator · Sky Tonight and device controls
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Capabilities
Design it. Build it. Ship it.
Big Bwain LLC's services bring product thinking and engineering into the same room, whether the result lives on a screen, in a store, or in someone's hand.
Software
From product idea to production
Product strategy, experience design, architecture, implementation, testing, deployment, and the operating work that keeps software useful after launch.
- 01 Product strategy
- 02 UX + architecture
- 03 Build + integrate
- 04 Test + release
Physical products
Prototype, test, and make it tangible
3D design, printing, and IoT prototyping turn an idea into something that can be held, evaluated, refined, and prepared for repeatable production.
- 01 CAD + modeling
- 02 Prototype
- 03 Field test
- 04 Prepare output
Delivery
One accountable path end to end
The product, software, release process, support surface, and next iteration are designed as one system instead of disconnected handoffs.
- 01 Release
- 02 Observe
- 03 Support
- 04 Improve
Physical products
Designed for the real world
The same end-to-end practice extends into CAD, print testing, and small-batch production. Hundreds of digital designs span functional tools, model railroading, geocaching, device mounts, and decor. The published designs have been downloaded more than 150,000 times across platforms. The former print catalog included more than 50 physical print listings.
Selected designs have sold both as downloadable files and as finished physical prints. The former print catalog also included some designs by other makers.
Physical production sand scoops
Digital design functional model-rail bridge
Shop print geocache container
Contact
Bring us the hard part
Tell us what you want to build — who it's for, where it needs to run, and when you need it. For help with a product you already use, include its name.
help@bigbwain.com