Marc Sigmund

Entrepreneur, Self-taught Software Engineer, AI Prompt Engineer, Strategy Consultant


GPT Assistant

GPT Assistant is your personal AI assistant in your pocket, powered by GPT-4. It lives within WhatsApp and is always only one chat away to answer all your questions.


PhotoshootAI is an AI-powered automated photoshoot studio. Customers can upload a few photos of themself and receive back AI-generated portraits in various situations and scenes.


Cardity is a digital first sustainable business card for teams and enterprises. Living within your Apple or Google Wallet you can instantly share your contact details with whoever you meet.

AnyScan - Document Scanner

PassGen - Password Generator

My Apps on the AppStore