Stephan Eberle

@steviee

iOS developer & indie maker from Bad Oldesloh, Germany. I build apps that work with ADHD brains, not against them.

Goals-first habit tracker for iPhone & Apple Watch. Built for ADHD brains: no streak shaming, flexible 0–5 intensity, all data on device.

Brown noise & sleep sounds generator for iPhone, iPad & Mac. 10-band EQ & Spatial Audio for deep sleep, ADHD focus, and deep work.

Classic chess with wooden design. Two players, one device. AI opponent included.

One-tap orbital slingshot. Orbit a star, release, ride gravity to the next one. Real spectral classes, bent spacetime, no ads.

REST API for e-invoicing: ZUGFeRD, XRechnung, Factur-X. JSON in, EU-compliant PDF out. No data storage.