I build apps of my own, and platforms for people who came with an idea and no map.
Hi, I'm Steffen. Berlin, working solo. Happiest when nothing exists yet, and rarely convinced that the obvious way is the right one.
Pitch me your idea. We'll take it apart together.
FOOD
Decide fast, eat the way you meant to.
KOLIBI
REMAINING412 kcal
iOS · Android
Kolibi reads the plate, estimates the portions and fills in calories and macros in seconds. Your targets are calculated for your body and your goal, and they shift on training days. Correct a portion once and every estimate after that lands closer.
Get the app →Decide before you leave.
Web
GetaBite maps vegan and vegetarian places together with the dishes they actually serve, built from menus people photograph on the spot. The scanner covers the supermarket shelf for the rest of the week. You walk in knowing what fits and what to ask about.
Open →LANGUAGE & PEOPLE
Say it in Spanish. Say it to someone who gets it.
Don't be a tourist.
1,000 words is enough.
Spanish with the least effort possible
Carpincho drills the moments you actually land in, from ordering at the cafe to the call you keep putting off. You speak, it listens and tells you the two words it hung on. Every word is spoken in Rioplatense, neutral Latin American and Spain, so you hear which one you are learning.
Get the app →
Social platform · Web
Peeranimo matches you with people working on the same thing you are. You describe where you are stuck, and the conversation starts with someone who has been there.
Open →DOCUMENTS & DATA
The document you need now. The reason the number moved.
Passport — Steffen G.
Valid until 2029
iOS
Passport, insurance, the contract someone wants a copy of today. Orivela keeps them in one place and puts the right one in your hand while you are still in the conversation. Add it once and you stop searching for it.
Get the app →Numbers moved.
Erdi knew why.
Web
ErdiKnows puts your releases, price changes and campaigns on the same timeline as your revenue and your signups. When a number moves, you can see what you changed the week before. Built for developers who ship weekly and want the answer in one screen.
Open →./work-with-me
Pick your case. I'll take you through how I work.
See all six →>_ contact
I'm available for freelance projects,
architecture work, and long-term
product partnerships.
Full product thinking, every step of the way.
Clean data models. Scalable from day one.
Revenue models, retention, growth: the business behind the build.
Self-built and client projects across multiple industries.