~/vienna/micro-saas $ whoami

Small tools that do one job right.

I have built software since 1993, when I co-founded Austria's first digital agency at 23. Three decades later I am back at the keyboard to build products myself. Not for enterprises with endless budgets. For the small everyday annoyances nobody bothers to fix. If it annoys me, it probably annoys you too.

$ cat stack.txt
User-FirstBuilt to LastPrivacy-FocusedMade in Vienna
// founder
Markus Hoefinger - Founder SpacerGIF
Markus Hoefinger
Founder, SpacerGIF
Vienna, Austria
Since 1993Serial FounderProduct-First

From Dial-Up to AI

A spacer.gif was a 1x1 pixel nobody ever saw, but every web layout in the nineties needed one. Invisible, tiny, holding the whole thing together. That is the kind of software I build.

I co-founded Austria's first digital agency in 1993, at 23. The next three decades went from startups to leading a 150-person team at Accenture Song. Big budgets, big teams, big complexity.

Now I am back to where I started: building products with my own hands. Not for enterprises. For real people with real problems. The kind of tools I want to use myself.

Every product here started the same way. Something annoyed me. I waited for someone to fix it. Nobody did. So I built it, with AI doing the heavy lifting. Thirteen annoyances, thirteen tools. If they bug me, chances are they bug you too.

// principles

One Problem. One Tool. Finished.

Most software tries to do everything and nails nothing. I pick one annoying problem and build the tool that finally solves it the way it always should have worked. Then I move to the next one. The test for every feature is the same question: does this make the tool simpler or more complex? If it is the second one, it does not ship.

01
MinimalismIf it adds complexity, it does not ship.
02
Attention to DetailThe things most people will not notice, but everyone will feel.
03
Zero FrictionOne tap. One task. Done.
04
User FirstStart with what the user needs. Work backwards to the tech.
// ai

AI Where It Earns Its Place

No chat box slapped on top of everything. AI sits inside the product only where it does real work: reading a receipt, sorting a subscription, understanding what you actually meant.

Smart parsing that understands intent.Categorization that learns as you go.Plain language that just works.
$ ls ./projects
sort:14 tools
MokkApp2026-06[live]
App Store Screenshot StudioTurn raw app screenshots into polished App Store visuals. The fastest way to design store listings that convert. Built for indie devs who ship.
SoloCoach2026-04[live]
Booking & Payments for CoachesIndependent sports coaches take bookings and get paid in one app. Clients book on mobile web, payments run through Stripe. No spreadsheets, no chasing money.
AgentSpeed2026-03[live]
AI Agent Readiness ScannerLike PageSpeed, but for AI agents. Scans your site for invisible barriers that block AI agents and gives you actionable fixes.
OpenPAX2026-02[live]
Flight Booking API for AIWhere AI agents book travel. Search 300+ airlines, book flights via REST API or MCP server. Flat €9.99 per booking.
ETF Savings Calculator2026-02[live]
Plan Your WealthThe simplest yet most advanced ETF savings plan calculator. Visualize your future.
HireSift2026-02[live]
AI Applicant ScreeningAI-powered hiring that sifts through applicants and shortlists the right talent.
Jenda2026-01[live]
Subscription TrackerConnect Gmail or forward receipts. AI detects your subscriptions automatically. No bank access needed.
StarReply2026-01[soon]
Automated Google Review RepliesAI-powered replies that sound like you. Connect Google Business Profile, never worry about reviews again.
Bill.Dock2025-11[live]
AI Receipt & Expense ScannerSnap a photo. Done. AI extracts everything and creates tax-ready expense reports.
Sheduler2025-11[soon]
Dynamic Event AgendasBeautiful multi-day workshop agendas with automatic calendar sync for participants.
Zero-Friction Tasks2025-09[live]
Personal Task ManagerThe first and only Todo app that syncs iOS and Windows natively. One tap. One task. Done.
OAWS Performance2025-08[live]
Podcast Investment TrackerStock picks from the "Ohne Aktien wird schwer" podcast vs. S&P 500 Index. Investment tracking since August 2024.
Seajet Wallet2025-07[live]
Ferry Tickets to WalletConvert your SEAJETS ferry tickets to Apple or Google Wallet. Board faster.
Jaukerl2025-07[live]
Vaccination Record AnalyzerAnalyze your Austrian ELGA vaccination records. Fast, secure, private.
// contact
hello@spacer-gif.com
// made in Vienna