This app was mentioned in 6 comments, with an average of 4.00 upvotes
There's several web sites that do this...
But if you insist on an app they do have them for Android too...
https://play.google.com/store/apps/details?id=org.blitzortung.android.app for example.
Google "real time lightning map".
They just missed (passing to the E of London).
Yesterday had Europe polka dotted with lightning - the only countries which missed it were Ireland and Norway. Today looks like more of the same.
Blitzortung Lightning Monitor is good on Android ⚡
Blitzortung Lightning Monitor.
It uses data from https://www.blitzortung.org/
Another cool website that displays this data in real time is https://www.lightningmaps.org/
This sorta explains how it works, it's a community project. https://www.blitzortung.org/en/cover_your_area.php
These are my favourite (free) android apps which probably aren't well known:
Blitzortung Lightning Monitor : It shows where lightning strikes in real time. It is great when you are are outdoor, or watching storm from your home.
OruxMaps: Offline maps, track recording, distance/area measuring and more. Install BRouter and you can use it to calculate routes (offline). It has so many features, it can be difficult to learn how to use it, but it's worth it.
LibreOffice Impress Remote: If you use LibreOffice Impress, this remote is must have for presentations. It works really seamlessly, you need to enable it in LibreOffice settings, and then it just works. (You need to pair your phone and laptop using bluettoth, but then it works.)
ON 3D-CameraMeasure: Measuring things with your phone. Just look at screenshots at google play. There are also another measuring tools from this developer in google play.
Simon Tatham's Puzzles: Probably the best collection of puzzle games. And it is free without ads. You can remove your sudoku, minesweeper, untangle... - everything is included in this one app.
WPS Office + PDF: View and edit your documents.
edit: formatting
Ja ist zwar was eigenes nutzt aber die selben Daten
https://play.google.com/store/apps/details?id=org.blitzortung.android.app