// Things I've Built

Not client decks. Not demos. Actual tools, apps, and systems deployed and running in the real world.

iOS App · Live

SunUp by GearTOP

Personalized UV safety app that calculates your real burn time based on skin type, live UV index, and cloud cover. Features 48-hour UV forecasts, family mode for multiple profiles, AQI tracking, and sun protection product recommendations. Built as a non-coder using AI-assisted development.

  • Live in the App Store since September 2025
  • Covers UV Index, AQI, burn time calculation, and family profiles
  • Integrates real-time UV and air quality data via location services
  • Built for GearTOP's sun protection product line
React Native Expo VibeCode Claude Code iOS
View on App Store ↗ Full build story ↗
SU
iOS App · Live

RunMate Pro

39 App Store rejections before final approval

GPS run tracking app with shoe mileage management, route history, and injury prevention tools. Tracks every run, monitors shoe wear across multiple pairs, and surfaces insights to help runners avoid overuse injuries. Built for TapeGeeks' running and recovery community.

  • Live in the App Store since September 2025
  • GPS tracking, shoe mileage, route management, injury prevention
  • Approved after 39 App Store review rejections — every one documented and resolved
  • Built by a non-coder using AI-assisted development tools
React Native Expo VibeCode Claude Code iOS
View on App Store ↗ Full build story ↗
RM
AI Web App

Content Creator PRO

Custom web application for generating platform-specific AI prompts. Built for a client running a $537K/year business who needed to produce professional content without hiring an agency. Generates tailored prompts for Instagram, email, Google Ads, product descriptions, and more — all maintaining consistent brand voice.

  • Deployed on GitHub Pages — live and used daily
  • Generates prompts for 8+ content formats and platforms
  • Built and delivered in 6 weeks
  • Replaced $35K+/year agency content costs
HTML CSS JavaScript Claude API GitHub Pages
Ask me about this →
CC
Automation · Internal

Multi-Platform Analytics Dashboard

Custom analytics system aggregating data from Shopify, Amazon Seller Central, Google Analytics 4, and Meta Ads into a unified view. Replaced 4 hours of manual Monday morning reporting with an automated overnight workflow. Built for internal use across GearTOP and TapeGeeks.

  • Aggregates data from 4 platforms: Shopify, Amazon, Google, Meta
  • Automated nightly data refresh via N8N workflows
  • Eliminated 4+ hours of manual reporting per week
  • Custom metrics tracking: ACOS, ROAS, organic vs. paid split
N8N Shopify API Amazon SP-API Google Analytics API Meta API
Ask me about this →
AD
Web · This Site

gregkowalczyk.com

This website. Built with Astro 5 and a custom glassmorphism design system. Static site deployed on Vercel with full SEO implementation — JSON-LD structured data, Open Graph, sitemap, canonical URLs. Design inspired by the Viable Edge Glass-UI pattern.

  • Built with Astro 5 (static) + Tailwind CSS v4
  • Custom Glass-UI design system with frosted cards and floating orbs
  • JSON-LD structured data: Person, ProfessionalService, LocalBusiness, FAQPage
  • Auto-deployed to Vercel on every push
Astro 5 Tailwind CSS v4 Vercel Glass-UI
You're already here →
GK

Want to Build Something Like This?

I build custom tools, apps, and systems for businesses that want to stop paying agencies and start owning their technology.

Let's Build Something