KistenRadar
Find boxes again with QR codes.
Photograph boxes, print QR labels as PDFs, and find everything later by search or scan.
- iPhone · iOS
- Stored locally on device
- Free · KistenRadar Plus
Portfolio
Apps for concrete everyday problems instead of feature noise.
I build small iPhone, iPad, and Mac apps for boxes, routines, movement, recipes, medication, and family workflows. The emphasis is on clarity, local storage, and useful detail.
- No second domain and no JavaScript language switching on indexable pages.
- Clear workflows, local storage, and deliberate product boundaries.
Apps
Six products, each with a clear job.
RecipeFlow
Turn web recipes into clear cards on your Mac.
Paste a URL or share directly from Safari: RecipeFlow extracts recipe structure locally and keeps it in a focused library.
- Mac · macOS 26+
- Stored locally on Mac
- Preview
TapDiary
Private daily check-ins for mood and energy.
A small daily check-in with weekly snapshots, a heatmap, reminders, and a widget.
- iPhone · iOS 17+
- Stored locally on device
- Free
Cyclr
The clear cycling computer for iPhone.
Live stats, local ride history, GPX export, and Apple Watch support without a mandatory account.
- iPhone · Apple Watch
- Local-first storage
- Free
Remed
Plan, remind, and track medication.
Locally stored medication plans with reminders, history, and PDF/CSV export.
- iPhone · iOS
- Stored locally on device
- Free
Coloring Heroes
Creative, calm, and ad-free.
Two drawing modes, photo import, and local storage for iPhone and iPad.
- iPhone · iPad
- Stored locally on device
- Free
Approach
Shared principles behind the apps.
Clear starts
Each app begins with the actual job, not with setup complexity.
Privacy by default
Local storage and fewer unnecessary data flows are the default, not an add-on.
Small products, cleaner decisions
Less surface area, better prioritization, and noticeably less friction.