Building & experimenting,
one app at a time
I'm a solo developer and I enjoy building useful, interesting applications especially with AI tools. From geocoding to language learning, financial tools to chess openings — these are some of the projects I've been working on.
Things I've built
A mix of passion projects and practical tools. Most are finished, a few are still in progress.
Opening Master
Master Chess OpeningsLearn the why behind every move. Watch, practice, and test your knowledge of 50+ essential openings with AI-powered explanations.
Sentence Lab
Spanish EditionBuild sentences, build fluency. Learn Spanish by constructing real sentences with active production and spaced repetition.
Your Horizon
Financial PlanningChart your financial future. Track investments, plan for retirement, and visualize your path to financial independence.
TripIQ
Travel SmarterArrive prepared, not clueless. Learn cultural etiquette, essential phrases, and local knowledge before you go.
SellThisHouse
Home Sale Command CenterYour complete home-selling companion. Track deadlines, manage tasks, coordinate your team, and compare offers from preparation to closing.
Tichu
Classic Card GamePlay the challenging partnership card game online. An interesting mix of poker, bridge and some other unique strategic challenges.
PDF Signer
Sign DocumentsSign PDFs quickly and securely. Add signatures, initials, dates, and text fields to any document in seconds.
Thin AI
Small Models, Genuine LearningA research program exploring what AI can do without frontier-scale compute. Small models that genuinely learn — parse, reason, reflect, and retain — all on a single machine.
TerraMap
Territory PlanningPlan and optimize sales territories with ease. Visualize coverage, balance workloads, and empower your field teams with smart territory management.
Trading Lab
Practice TradingSharpen your trading skills risk-free. Simulate trades with real market data and learn strategies without risking real money.
Pinpoint Geocoder
US Geocoding APITurn addresses into coordinates — fast, accurate, and affordable. 250M+ address points, sub-100ms responses, and no data restrictions at 1/10th the price of major providers.
TradeInvoice
Invoicing for TradesRun the back office of your trade business. Manage clients, estimates, jobs, and invoices — track outstanding payments, recurring billing, and revenue, all in one dashboard.
Cadenza
Piano Journal & LibraryMaster your repertoire, one session at a time. A practice journal and curated library for classical pianists.
ArtistPortfolio
Showcase Your ArtCreate stunning portfolio websites in minutes. Elegant galleries, custom domains, and beautiful themes for artists.
Reveal The Word
Scripture MemorizationStudy Scripture and memorize for life. Progressive hint modes and spaced repetition help you commit verses to long-term memory. 100% free.
Built in the high desert
Hey, I'm Jeff — a solo developer who loves building and experimenting with software. I work on whatever interests me: education tools, creative apps, productivity utilities, games. If an idea gets stuck in my head, I build it.
I care about making things that are well-crafted and genuinely useful. Some of these projects started as weekend experiments, others as tools I needed myself. All of them reflect what I find interesting and worth exploring.
I work in Albuquerque, NM — a place with clear skies, wide open space, and not a lot of distractions. It's a good place to focus and build things.
Let's connect
Have a question, idea, or just want to say hi? I'd love to hear from you.
jeff@highdesertapps.com