Welcome to Johannes Singler's Private Website

2026-08-17 Mobile phone plans for cross-border commuters to Switzerland

There are now recommendations for mobile phone plans for cross-border commuters to Switzerland on a dedicated page.

2025-02-18 An update after a long time

I have finally rewritten LogicalSolver from Dart to TypeScript (thanks to the AI). This makes the app maintainable again, and I was able to fix a few old bugs. In addition, many controls are hidden when printing so that nothing distracts from the grid.

2019-10-27 20th Birthday

It has been 20 years since this private website (formerly called "homepage") went online. About 460,000 visits have occurred since then, about 70% of them in the last three years. Each visitor stays about 10 minutes on average. Thanks for your visit.