Independent software studio · Houston, TX

Apps for game day. Websites built to last.

Sienna Logic is a small independent studio in Houston, Texas. We design and build fast, hand-coded websites and web apps for Houston-area and remote clients, and we build focused apps for youth sports.

Web development See what we make

Makers of WalkAmp
iOS, Android & web
Based in Houston, working anywhere

Products

What we make

A shipped app that teams use every week and a league version of it, a walk-up music playbook, a game you can play right now, and one tool on the way.

Live · iOS & Android

WalkAmp

Walk-up songs & stadium announcer for youth baseball and softball

Every kid deserves a walk-up song. WalkAmp turns a coach's phone into the ballpark PA: build the lineup, tap the batter, and the announcer calls their name over their own song. It's one of the only walk-up apps that handles the whole team, not just one batter at a time.

Full team intros over a continuous music bed
Announcer voices in English, Spanish & Japanese
Apple Music search with precise clip editing
Snap a photo of the roster to import it
Crowd hype sound board for the dugout
Share access with a co-coach or parent

Visit walkamp.com

WalkAmp's live lineup screen showing a softball roster with a player's walk-up song playing

Live · Web

WalkAmp for Leagues

Walk-ups for every team in your league

A league sets up its divisions, teams and coaches, then pays per team, once a season. Every coach gets the full WalkAmp app at no cost to them. Parents pick clean walk-up songs from an emailed link, the league or coach approves them, and the coach presses play.

Divisions · Rosters · Song approvals Visit league.walkamp.com

Live · Web

On Deck DJ

The walk-up music playbook for youth baseball & softball

Song ideas your league won't bleep, organized by sport, vibe, and age group. A one-tap song finder, ballpark speaker picks, and a guide to running game-day sound without missing an at-bat.

Song lists · Song finder · Gear guide Read the playbook

Live · Web

Game of the Generals

The board game you grew up with, now in your browser

The classic Filipino game of hidden ranks and bluffing, online. Quick-match against other players, send a private room link to a friend, or practice against the AI on a difficulty ladder. No account needed, and free to play.

Multiplayer · AI practice · Replays Play now

In development · iOS & Android

Dugout

The offseason tool for youth baseball coaches

Player evaluations and a draft board, roster and depth chart, per-inning game-day lineups on a diamond, and seasons that carry over year to year. Built for the work that happens between games.

Evals · Draft · Lineups · Seasons Ask about early access

Services

Web development, hand-built and fast

We build websites the same way we build our own: hand-coded, quick to load, and easy to change later. No page builders, no plugin sprawl. We work with businesses across the Houston area and with remote clients anywhere. Look at the examples below and view the source. That's the pitch. Read how a project goes.

Product & marketing sites

Landing pages that explain the thing and get the download or signup. Store badges, promo video, pricing, FAQs, and the metadata that makes links look right when shared.

Content sites & guides

Long-form pages, lists, and small interactive tools, structured so they read well on a phone and stay easy to add to a year from now.

Web apps

Browser-based apps with real-time multiplayer, sign-in, and payments when you need them. Built on modern, boring-in-a-good-way infrastructure.

Care & hosting

Fast static hosting, redirects so old links keep working, analytics wired up, and small ongoing changes handled by the same people who built it.

Sites we built and run

walkamp.com

Product site for a mobile app

The home of WalkAmp. A landing page that sells the app, plus how-to guides and walk-up song lists, all hand-coded with no build step.

Promo video, pricing, FAQ, and a QR code that opens the right store
Guide and song-list sections with clean URLs
Structured data and social previews on every page
Promo code redemption and a download page that picks the right store

Read the case study See the site

ondeckdj.com

Walk-up song playbook and song finder

A playbook of walk-up song lists, an interactive song finder with audio previews, and ballpark gear guides, with its own retro scoreboard look.

Long-form song lists by sport, style, and age group
Interactive song finder with audio previews
Gear guide with affiliate links and clear disclosure
Lazy-loaded WebP images, fast on a phone at the field

Read the case study See the site

Game of the Generals

Real-time multiplayer web app

A full game in the browser: matchmaking, private rooms, AI opponents, replays, and saved formations, running on a serverless back end.

React front end with four selectable visual themes
Cloudflare Workers and Durable Objects for live game rooms
Quick match, private room links, and an AI difficulty ladder
Google sign-in, profiles, and replays

Read the case study Play it

Need a site built?

Tell us what it's for and who it's for. We'll reply with an honest read on scope, timeline, and whether we're the right fit.

Start a project

About

How we work

Sienna Logic is a small team, not a big agency or app company. That shapes everything we ship.

Start with a real problem

Every product here began as something we wanted for ourselves. If it doesn't earn its place on a real field or a real game night, it doesn't ship.

Do one job well

Our apps and sites are focused on purpose. Fewer screens, fewer settings, and the important action always one tap away, because game day doesn't wait.

Talk to a human

The people who write the code are the same people reading the inbox. Bugs, ideas, and "I wish it did this" go straight to the folks who can fix it.

Have a question, a bug, or a project?

We usually reply within one business day. Partnership and press inquiries are welcome too.