Apps
Everything I've built.
Every app I ship — from the newest release back to a 2016 first attempt. Filter by what an app does, or by the device it runs on.
17 apps
Mobile Darkroom 2026 · App Store A local, non-destructive photo lab for iPhone and iPad — RAW, curves, masks, depth-aware bokeh and honest optical simulations. Everything on-device. 
MandelKit Explore infinite Mandelbrot and Julia fractals — native Metal rendering, arbitrary-precision deep zoom and export, on iPhone, iPad and Mac. 
UpscaleKit Upscale photos and illustrations right on your Mac — local Core ML models, pixel-precise, private, with no image upload. 
RadianceCap The iPhone capture app for sensor-rich 3D scenes — it stores the known camera pose, the optics and LiDAR depth with every photo. Feeds RadianceKit. 
INDD2IDML in the works Convert Adobe InDesign .indd documents to open IDML on macOS — a small, focused prepress utility. Coming soon to the App Store. 
SpawnHere 2026 · direct download Opens new app windows on the display under your pointer — a small native menu-bar utility for multi-display Macs. 
RadianceView A fast, native viewer and editor for 3D Gaussian-splatting scenes on the Mac — open PLY/.splat/.spz captures, clean them up and export. Companion to RadianceKit. 
Heightmap Turn any photo into a printable 16-bit height map for UV printers, laser engravers, CNC and 3D — depth estimated on-device. 
Quinque A daily five-letter German word puzzle — one word, six tries, the same riddle for everyone. Free, no ads, no tracking. 
Mundwerk Fast, private dictation for macOS — fully on-device, types text right at the cursor. 
Druckkosten Print-cost calculator for print shops — paper, toner, finishing, margin; quotes as PDF. 
CameraView All your HomeKit cameras side-by-side in one configurable grid on your Mac — edge-to-edge, local, private. 
RadianceKit Gaussian-splatting / radiance-field toolkit for macOS. On the Mac App Store; full product site at radiancekit.de. 
Listen4Me Real-time live captions of spoken German — accessibility-focused, on iPad and iPhone. 
Showroom Test 2021 · unreleased A demo app with several 3D scenes — an apartment, a hotel, a sports car — built with the Unreal Engine to show what real-time 3D can do on iPad and the Mac. An unreleased 2021 prototype. 
Kunsthandel 2021 · unreleased A 3D version of kunsthandel.de, built with the Unreal Engine — a Corona-era virtual gallery you could walk through. An unreleased 2021 prototype. 
igersmunich 2016 My very first app, 2016 — an iPhone companion for the Instagramers Munich photo-walk community: latest posts, instameets and news. No app matches this selection.