About
Stefan Papst — mobile app growth consultant from Austria, currently based in Budapest. Operator background: co-founded and scaled a portfolio of B2C subscription apps before consulting full-time.
Most founders get either a generalist freelancer or an enterprise agency. Tap Convert is the missing middle — one app-specialist partner who crosses product and marketing, and who has run real paid UA and product experiments with their own money.
Paid UA without unit-economics validation is a predictable path to overspend. Start with ARPU, LTV and free-to-paid, set the CPA ceiling, then acquire. Fix attribution before touching bids.
In one line
"I've run real paid UA and product experiments with my own money — so I optimise your app the way I'd optimise mine: starting from the numbers."
The company
Registered in Budapest, Hungary
The path here
Foundation
Computer Science & Business Management. The engineering to build, the business lens to grow.
Co-founder
Co-founded a software company — learning to ship and run real products end to end.
Operator
Built & scaled a portfolio of B2C subscription apps with my own capital.
Today
Fully focused on subscription web & app growth for founders.
Work with me
Book a discovery call, or send a short intake and get a personalised video response.
