Business informatics · HdM Stuttgart
Six years of Android development with 265,829 downloads, today ScreenTether for Windows and Android.
Looking back · 2016 to 2019
My own Android versions for phones that no longer got updates: from the LG L Fino in 2016 to the Xiaomi Mi A1. For the Galaxy Note 3, LG G3 and Mi A1 I was the official maintainer.
Original screenshot: RR 6.0, Android 8.1, LG G3, 13 Feb 2018. Redrawn on the display.
2018 to 2020 · Havoc OS
I took the Mi A1 from Android 8.1 to 10 and the Mi 9T from 9 to 10. On top came an official GSI: one system image that boots on any Treble device.
Mi A1: Havoc 2.4, maintainer MountaserHalak (redrawn). Mi 9T: Havoc 3.8, original screenshot.
2017 to 2020 · Kernel
My Moun Kernel ran on the LG G3 and the Mi A1. I merged updates from Linux and Qualcomm, and built and released every version with my own shell scripts.
Original screenshot: RR 7.0, Android 9, Mi A1, kernel 4.9.158-Moun_Kernel_v7.2+. Redrawn on the display.
2026 · Back at the desk
Set it up once over USB, then everything runs over Wi-Fi: a second screen, apps in their own windows, several phones. Local, no account, no cloud.
How ScreenTether works
Kotlin. Turns wireless debugging on by itself, but only on a network where a paired PC answers.
Wake and control commands over UDP, signed with HMAC-SHA256 and protected against replay.
Go. Its own adb server that leaves other developer tools alone, and an interface for windows, quality and devices.
An extra Android screen on the PC. Whatever runs on the phone itself stays untouched.
Up to three apps at once, each in its own window next to your PC programs.
No account, no cloud, no telemetry. Keys live in the Android Keystore and encrypted on Windows, and the licence is checked offline.
Several phones on one PC at the same time, and every phone knows several PCs.
FIG_07 · How I work
Before ScreenTether I had never worked with Go. My part: setting the requirements, breaking the work into steps that can be checked, and reviewing every result.
What the app has to do and where its limits are. 13 specifications for ScreenTether.
Claude Opus turns them into implementation plans that I approve.
Gemini (via Google Antigravity) or Claude carries out the plans step by step.
Claude Opus and I review every change. I decide what goes in.
| Day | Claude | Gemini | no AI tag |
|---|
The colour shows which AI model is listed as co-author in the commit.
FIG_08 · Infrastructure
I turned a single computer into a server that does exactly what I need: storage and backups, secure remote access, a smart home without vendor clouds and the services behind this website. I set it all up and keep it running myself.
Services
One entry point for every service, encrypted, with certificates that renew themselves.
The domain always points to my current IP address, even when the provider changes it.
Secure access to the home network on the go, without exposing services to the internet.
Blocks ads and trackers for every device at home, with nothing installed on the devices.
The hub for lights, sockets, sensors and automations.
Connected by hand: own service account, access through my domain over HTTPS, device state reported back.
Devices are controlled directly on the home network, not through the vendor's cloud.
Start and shut down the PC by voice or scene, and track power use per PC.
All container logs in one place, live in the browser.
Measures the line regularly and watches the cable modem's signal levels.
Important data is also backed up to cloud storage.
A development environment on the server, reachable from any device.
A searchable photo library without handing photos to a cloud provider.
Manage and share files on the server from the browser.
The page you are reading runs on this server.
FIG_09 · Numbers 2016 to 2022
SourceForge per file and GitHub, retrieved in October 2026. Not counted: RR 7.0, Mega, Descendant and early builds without counters.
FIG_10 · About me
Business informatics and digital media at Stuttgart Media University (HdM), 3rd semester.
About me
Business informatics and digital media at Stuttgart Media University (HdM), 3rd semester.
How I work
Contact and availability
I am looking for a working student position now, and for an internship semester placement from the winter semester 2027/28.
