iOS App · Website
Tulpi
Website and iPhone app. Tulpi names 3,025 plants on the phone, says how sure it is, and keeps yours alive with care that remembers each plant. The site at www.tulpi.app mirrors the app in four season colours.
Client · Real estate
nbh.immo
Berggruen Holdings, the private property company of Nicolas Berggruen, needed to show its available Berlin commercial space without putting it on the open market. I designed and built nbh.immo: a private, owner-direct portal for their Gewerbeflächen, plus its own admin where NBH manages every building, unit and photo gallery themselves. Filterable by use and district, always live and current.
Own product · Training
Healmen
Full-scale training platform for men to develop real relationship skills. 14 disciplines spanning communication, emotional intelligence, conflict resolution, intimacy, and self-awareness. 59 structured courses with 256 lessons following a read-practice-reflect methodology. Features progress tracking across all disciplines, personalized archetype profiles, streak tracking, Stripe subscription management, and a full admin CMS for content and user management.
Client · Hospitality
Honey Lou Website
Full website for Honey Lou Berlin. Includes a custom-built reservation system with real-time capacity tracking, admin dashboard, automated guest confirmations, waitlist handling, and calendar exports.
Own agency · AI strategy
Microdose
AI strategy agency. Microdose builds the one position a brand can defend, proves it in the brand's own words, publishes it in the shape AI engines read, and measures whether they now say it. Four engines, one number, every month. The agency runs on its own tool, the Observatory: live cultural monitoring, sentiment tracking and signal detection.
iOS App
Hours Away
A world clock that answers a question. Hours Away says in one sentence when the people you work with can be reached, in your own time, and marks the hours everyone shares. For iPhone, iPad and Apple Watch.
ShareSwiftUI · Swift 6 · WidgetKit · WatchConnectivity
Everything else · newest first
Own product · Interactive art
MIMIS WORLD
A browser world made from the paintings of Mimi Ritzler. You play a drop of pigment walking around inside her work. Fifteen of her real canvases hang in two galleries and wake, one at a time, as you do the thing each one is dreaming of. At the end you paint your own and it hangs beside hers. Nothing here was designed by eye: every colour is a real pixel lifted from one of her canvases, and every shape is built by one renderer that turns any form into her nested contour rings. Vanilla Three.js and hand written GLSL, sound synthesised live, the whole first load about 320 KB. Paintings by Mimi Ritzler, used with permission: instagram.com/mimiritzler
Own product · Social
Hi Honey · Dating App
Hyperlocal dating app designed for Honey Lou Berlin. Users browse profiles tied to the venue, match based on music taste and attendance patterns, and commit to meeting at the bar. Built with location-aware matching, event-night push notifications, integrated table reservations, and a venue admin dashboard tracking match-to-visit conversion.
Own product · AI
Inner Council
Jungian archetype inquiry platform. Users complete a deep questionnaire spanning identity, relationships, career, shadow, and purpose. AI synthesizes responses into a personalized archetype profile with tension mapping, shadow pattern analysis, and integration paths. Each result generates a designed, downloadable PDF report. Includes Stripe-powered payments and a full admin dashboard for managing users and analytics.
Own product · SaaS
CashCount Guru
AI-based accounting software for bars, restaurants and clubs. The nightly cash count becomes the schedule, the staff costs and the P&L. Close-out in one minute, automatic wage calculation with night surcharges, profit and margin per month. Runs next to the till, no new hardware. Running a real bar group since January 2026: 180 nights closed out, 209,000 euros reconciled, 2 venues, 13 staff.
iOS App
muri
Bedtime stories made from your child's words. Your child taps two or three pictures or says them into the microphone and presses the light. Three muris make up a story that exists only once, with your family's first names in it, and read it aloud. Twenty seconds later the screen goes dark. For children aged 2 to 10, on iPhone. With Muriel Buchheim.
Tools
Free tools to download.
Small, sharp tools I built. Free to download and use.
noagency
Which school of advertising should your campaign follow?
Campaign direction · 8 agency schools · Claude skill
findjob
A job search engine for the EU & German market.
EU + Germany · Job search · Excel output
Playground