The following line networks are offline available (without any additional download):
• Istanbul rapid transit map (subway, tramway, suburban trains, Busway, funiculars and aerial tramways)
• Istanbul rapid transit geometric map
• Metrobüs lines in Istanbul

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Homepage: https://dieeinsteiger.blogspot.com

Easy zoomable line network app for all Istanbul residents and tourists!

All route maps are available completely offline, so they work reliably anytime, anywhere. The app offers intuitive maps for scrolling and smooth zooming. Various tabs allow you to quickly switch between different network maps and transport types, so you always have the right route map at your fingertips.
Route networks are frequently referred to as transit maps, system maps, or line diagrams. In different regions, they are commonly known as subway maps (US), tube maps (UK), or metro networks. Depending on the focus, these may also be called rail and bus maps, network schematics (spider maps), route planners, or departure charts. Whether providing a comprehensive city-wide plan, a night service map, or a topographic track layout, they represent the entire public transport infrastructure.

You can leave suggestions for improvement, ideas, wishes or simply feedback by e-mail or in the respective contact form on the following page: https://dieeinsteiger.blogspot.com/p/kontakt.html

Notices:
• Disclaimer: This app is a private project and is not an official app of any government agency or government body. The app does not represent any government agency or authority. No guarantee is given for the accuracy or completeness of the app's content.
• Source of information: The route maps and information used in the app are based on publicly available data and publications from the relevant transport companies. The official maps and information on local transport can be found on the website of the municipal transport operator Metro Istanbul: https://www.metro.istanbul, the bus and tram operator IETT: https://iett.istanbul, the state railway company TCDD Taşımacılık (for Marmaray): https://www.tcddtasimacilik.gov.tr, and Şehir Hatları (for ferries): https://www.sehirhatlari.istanbul.
• The embedded maps in this app be subject to the Creative-Commons license (CC BY-SA 2.5) and were created by Wikipedia-User Maximilian Dörrbecker „Chumwa“ (copyright holder).
• The app is not a product of Metro Istanbul. There is therefore no connection to these companies or transport associations.
• Usable with phone and tablet with Android 6.0 (Android Marshmallow, API 23) to Android 16 (Baklava, API 36).

Have fun in the Google Play Store, dieEinsteiger.