I build small, focused apps that just work.
Three apps, three problems worth solving properly: tracking flights for virtual airlines, keeping your day organized, and getting your passwords into Safari without a cloud in between.
One page each, so you get the full picture.
Every app here started as something I wanted to exist for myself. Pick one below for screenshots, features, and how to get it.
Flight Tracker XP
Native flight tracking for X-Plane, built for smartCARS-based virtual airlines — no extra plugin required.
Learn more
Listenheld
A smart app for tasks, checklists and reminders — with shared lists, widgets, and iCloud sync built in.
Learn more
SafariKeePassXC
Connects Safari to your KeePassXC database. Autofill, TOTP codes, and password generation — all local.
Learn moreHey, I'm Markus.
I'm an independent developer building native apps. No team, no roadmap dictated by a board — just problems I run into myself, that I end up caring enough about to build a proper solution for and keep maintaining.
Flight Tracker XP came out of my own flight-simulation hobby. Listenheld came from wanting a checklist app that didn't get in my way. SafariKeePassXC came from wanting my passwords in Safari without trusting them to yet another cloud service.
Got a question, bug report, or feature idea?
Discord is the best place to reach me — I'm in there myself and read everything.