The zoomable map summarizes all flea markets of Hamburg in one map. Therefore is the well-known S+U-line network used. It can also be used offline.
The app shows all opening times, a approximate number of stands and the street.

https://www.facebook.com/203994253076876
https://dieeinsteiger.blogspot.com

Notices:
• Usable with phone and tablet with Android 4.1 (Jelly Bean, API 16) bis Android 10.0 (Q, API 29).
• The content of the apps is not guaranteed to be correct or complete.
• The embedded map is released for free use by Locafox GmbH (Text & Research: Alexander Prietz, Katja Zimmermann). Source: https://www.locafox.de/magazin/flohmarkt-map-berlin/