Apps and mobile-first products
Cross-platform apps built with React, TypeScript and Capacitor, shipped to real users and iterated on over time. This includes products such as Dealer ID, Quiz Fight and Runish.
Projects by Halfdan Harring
A look at how Halfdan Harring builds products — across apps, SaaS platforms, AI-assisted tools and ongoing experiments. This is the product-building side of the work, rather than a plain list of apps.
SaaS and web platforms
Web apps and SaaS products such as TaskMondo, built on Firebase, Firestore and Cloud Functions, with a focus on simple workflows and fast iteration.
AI-assisted tools
Products like LostLead that use AI to support real business processes, developed with an AI-assisted workflow using tools such as Cursor and ChatGPT.
Product experiments
Smaller experiments and ongoing rebuilds, such as HeadToHead, where ideas are tested, paused and revisited as part of a continuous product-building practice.
Where to look next
- App portfolio
The individual apps and products.
- GitHub
Code and open work.
- AppsMedHalfdan.dk
The full app portfolio.
- HalfdanHarringBlog.dk
Writing on development and software.