# Polizei Stressi

> Free iOS and Android app (German: POLIZEI STRESSI) that shows every demonstration, rally and vigil officially registered with the Berlin assembly authority (Versammlungsbehörde der Polizei Berlin) as a calendar, with location, route, time and push notifications. Made by Boris Niehaus in Berlin.

Since 23 February 2021, Berlin's Versammlungsfreiheitsgesetz (VersFG BE, section 12 (8)) requires the assembly authority to publish all officially registered assemblies: name, location, route, date and time. The authority updates the list on berlin.de daily, around 2 pm. Polizei Stressi collects this data every day and keeps an archive of more than 50,000 assemblies since June 2021. Berlin is the only German state with such a publication duty, so the app only covers Berlin.

The app is not affiliated with the Berlin police or with the zine "Stressfaktor"; the name is a nod to it.

## Features

- Calendar of all registered demonstrations, rallies and vigils in Berlin, searchable by keyword
- Event details with location, route on a map and export to your own calendar
- Push notifications for new registrations matching saved keywords
- Live tracking of police and rescue helicopters over Berlin (ADS-B data from adsb.lol), with alerts for lift-off, circling and proximity
- Court hearings calendar
- Daily summary of new registrations, written by an LLM
- Weekly Media Impact: every Monday, the five protests of the week that made the Berlin press, with the articles and reported head counts
- Analysis views: keyword histograms, weekday and time-of-day breakdowns, Berlin election 2026 special
- iPhone Duo support across both displays (iOS 5.0)
- AI chat (beta) on Apple's Private Cloud Compute, for iOS 27 devices with Apple Intelligence
- Available in 29 languages

## Links

- [Website](https://polizeistressi.de/)
- [App Store](https://apps.apple.com/de/app/polizei-stressi/id1672243697)
- [Google Play](https://play.google.com/store/apps/details?id=com.just161.polizeistressi)
- [Data dashboard](https://polizeistressi.de/data/index.html): interactive statistics on all assemblies registered in Berlin since 2021
- [Helicopters over Berlin](https://polizeistressi.de/data/heli.html): which police, federal police and rescue helicopters flew over Berlin in the last 24 hours, live map and minutes in the air per aircraft
- [Privacy policy](https://polizeistressi.de/privacypolicy.html)
- [Bluesky](https://bsky.app/profile/polizeistressi.de)
- [Article: why photographers and journalists covering Berlin should install Polizei Stressi](https://medium.com/@bo.niehaus/why-photographers-and-journalists-covering-berlin-should-install-polizei-stressi-berlin-protests-31b4eab2c739)
- [Article: getting Polizei Stressi ready for iPhone Duo](https://medium.com/@bo.niehaus/getting-polizei-stressi-ready-for-iphone-duo-182abfedc54d)
- [Developer](https://borisniehaus.de/)

## Updates

- 2026-10-18 (v5.2.0, iOS / Android): Polizei Stressi is now free. New users get one week of everything, then the calendar stays free and the full version is a one-time purchase. Existing users keep everything.
- 2026-10-16 (v5.1.0, iOS / Android): New Conflicts page: which wars and conflicts bring Berlin to the streets? 18 conflicts ranked, with monthly trends since 2021. Analysis tab reorganised.
- 2026-10-09 (v5.0.0, iOS): Runs across both displays of iPhone Duo. Plus an AI chat (beta) on Apple's Private Cloud Compute.
- 2026-10-04 (v4.4.2, iOS / Android): Weekly review and daily summaries open instantly, even offline.
- 2026-09-25 (v4.4.1, iOS / Android): New: Weekly Media Impact – every Monday the five protests the Berlin press covered.
- 2026-09-13 (v4.2.5, iOS / Android): berlin.de outage banner, court calendar fixes, announcements via push.
- 2026-08-18 (v4.2.0, iOS): Election special: numbers and insights around the Berlin vote.
- 2026-08-09: Better daily summaries.
- 2026-08-01 (Web): Data dashboard live: charts and a topic map for close to 48,000 assemblies since 2021.
- 2026-08-01 (v3.3.2, Android): Approved on Google Play.
- 2026-07-30 (v3.3.2, iOS): Compare two keywords, breakdown by weekday and time of day, four app icons to pick from.
- 2026-07-29 (v3.3.1, iOS): Send feedback straight from the app.
- 2026-07-15 (v3.1, iOS): Court hearings: searchable, with notifications and calendar export.
- 2026-06-17 (v3.0, Android): Android app rebuilt: alerts, widget, daily summary.
- 2026-05-12 (v3.0.45, iOS): Export several events to your calendar at once.
- 2026-05-05 (iOS): Helicopter tracking is back, with pushes for lift-off, circling and proximity.