How is it flowing? The story of FlowFlow

Written by Roman on July 16, 2026

Back in 2017 I started FlowFlow as one of my first pet projects, and it has been quietly evolving ever since. The idea behind it - bring the information about all Swiss waters easily accessible to the public, for free. This year, thanks to AI tooling, I could finally give it the frontend it deserves and release it under flowflow.planet10.ch.

What you can do with it

FlowFlow shows all water monitoring stations in Switzerland in one place — water temperature, discharge, and water levels for rivers and lakes across the country. You can search for a station, browse them on a map, or just check whether your river is warm enough for a swim. No accounts, no ads, easily accessible on your phone.

How it's done

All measurements come from official Swiss sources such as BAFU/FOEN hydrodata and MeteoSwiss — FlowFlow simply gathers them in one place and makes them pleasant to look at. Under the hood it's a Ruby on Rails app, self-hosted, importing fresh data every ten minutes.

Feedback welcome

FlowFlow is free for everyone. Have a look at flowflow.planet10.ch — I'm happy to hear your feedback via our contact page.