Portfolio

Apps, websites and tools I've designed, built and shipped. Open any project to see what it does and the Information Systems skills behind it.

App Store · 200+ downloads

FitnessTracker

iOS & watchOS App

Workouts, nutrition and progress tracking with an Apple Watch companion. My first shipped app, and still the biggest.

  • Cloud database
  • Health data integration
  • Marketing analytics
View project
On the App Store

HopeScroll

iOS App

Scripture laid out like a social feed: one full-screen verse at a time, with themed collections and reading plans.

  • Data modeling
  • Information architecture
  • Business logic
View project
On the App Store

TerraMarker

iOS App

Custom maps for your land, with waypoints, boundaries, GPS tracks, acreage and print-ready PDF export.

  • Geospatial data
  • Offline data
  • Report generation
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Live client site

Old Chief Leather Co.

Client Website

I'm the only developer for a small leather business, and I built, host and maintain its website.

  • Requirements gathering
  • Web hosting
  • Business outcomes
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Chrome & Safari

Homebase

Browser Extension

A quieter new-tab page you can customize, with tasks, links, weather and a new photo every day.

  • Data privacy
  • API integration
  • Search logic
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PMG Dating

iOS App

The missionary planning framework applied to dating, with weekly goals, a people pipeline, a calendar and a map.

  • CRM pipeline
  • KPI tracking
  • Process design
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On the App Store

Plate Calculator

iOS App

Enter a target weight and it shows exactly which plates to load. You can also build a load and see the total.

  • Algorithm design
  • Data validation
  • Release management
View project
Try it free

Rig Finder & Ambulance Helper

Web Tools

Two quiz-style tools that recommend a camper rig, plus a build tip, based on a few answers.

  • Decision support
  • Business rules
  • Form design
View project
Play free

Bugstorm

Browser Game

A learn-to-code adventure where kids write small pieces of logic to hold off waves of bugs.

  • Logic & control flow
  • State management
  • Local storage
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marcusdwilliams.com

Website

This site. I wrote it by hand, and it holds a landing page and a privacy policy for every app I ship.

  • Server configuration
  • Version control
  • Information architecture
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Utah Court Surfacing

Court Construction

As crew leader, I ran crews of 12+ building pickleball, tennis and multi-sport courts.

  • Team leadership
  • Scheduling
  • Logistics
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Ongoing

Ambulance Conversion

Hands-on Build

Turning a retired 1990 Ford E350 ambulance into a livable off-grid camper.

  • Project management
  • Systems design
  • CAD
View project
I'm always working on something new. Want to talk about a project or a role? Get in touch.