About
Maciej Szamowski

Maciej Szamowski

Marketer of 16 years. Solo developer of one. Building hora Calendar — a native macOS Google Calendar client — from Poland.

years
16+

in marketing

big-tech stints
3

Samsung · TikTok · Ubisoft

lines of Swift
16k+

shipped in 24 months

solo dev
1

from Poland, in public

“The Mac calendar Google never built.
Shipped by one person, in public, from Poland.

Hi 👋 — you're about to trust an app with something important: your day. So here's the short version of who I am and why I built this.

Where I'm coming from

For the last 16+ years I've worked in marketing, split between big tech and gaming names (Samsung, TikTok, Ubisoft) and smaller places — SaaS startups, ad agencies. Roles changed, companies changed, tools changed.

Two things never did: email and calendar. Any meaningful work in the 21st century runs on those two rails.

For email, I eventually found Mimestream — a native macOS Gmail client. It's excellent, full recommendation.

For calendar, I never landed. Functionality was missing, or the app was slow, or the design clashed with how I think about time. I kept switching, kept paying, kept being mildly annoyed.

The pivot

Two years ago I decided to come back to something that had always pulled at me but which I'd never committed to: programming.

I started small — little fixes in web dev projects. Then I fell into the Python rabbit hole. Then one evening I looked at my Mac and thought: I'm a macOS user. Let me try Swift. Let me build something real.

I didn't have the idea yet. Then it arrived.

The idea

Build the calendar I'd been looking for. One that actually uses what macOS and Google Calendar can do:

  • Real Google Meet integration
  • Color-coded events the way Google intended
  • Native macOS notifications
  • A menu-bar widget that pulls its weight — showing the next meeting, not just the time
  • And above all, a native app — not a web page pretending to be one

That's hora Calendar.

Where I am today

16,000+ lines of Swift. A Linear backlog that keeps expanding. One developer — me — shipping from Poland, in public.

If you live in Google Calendar, you use a Mac, and every existing option has let you down in some small way — give hora a shot.

Thanks for reading,

Maciej