A handful of small apps, each built to solve one specific problem — my own, or one for friends and family. Creativity has many facets — this is one: every project starts as a sketchnote that maps out the problem, then becomes working software through co-development with AI. Three principles guide the build: data stays local and unshared wherever possible; design is process-centric; and the visuals stay clear and reduced, aiming for maximum usability. These are functional tools, not showcases. A live demo is linked wherever the project has one.
My personal drawing practice timer, shared so anyone can use it: guided sessions with warm-up, exercises, and prompts built right in. Fully extensible — write your own practice plan as a simple JSON template (or generate one with an AI chat) to shape sessions around your own goals.
My most complex project so far: a personal household and net-worth app covering the full financial picture for individuals and families — importing real bank statements via CSV with automatic duplicate detection, categorizing transactions with history-based suggestions, tracking recurring fixed costs and contract deadlines (including cancellation-period reminders), following net worth over time, visualizing cash flow by area of life through a Sankey diagram, and flagging suspicious transactions through local, self-learning pattern and amount-outlier detection. Built with traceability, practicality, and personal privacy in mind.
A shopping list PWA built around real grocery-run friction: quick-select chips for frequent items, automatic supermarket-aisle sorting, duplicate detection, and large touch checkboxes with a progress bar for checking off while you shop. Multiple named lists, JSON export/import, and shareable QR codes round out the planning side — fully offline, bilingual (DE/EN), all data stays on your device.
A 35-day guided learning path that takes complete beginners from first mouse clicks to file management, web research, office basics, and digital safety — with daily keyboard-typing drills built in. Structured like a game: learners complete daily "missions" across five phases (warm-up, lesson, mission, typing practice, wrap-up) and earn badges as they progress. A separate tutor/parent view gives whoever's guiding the learner a full overview — mission board, session prep, and badge management — so teaching stays as easy as learning.