Seek

I spotted this plant at work during our break.
My supervisor Celine helped me to identify it. It is a purple loosestrife (Lythrum salicaria) or "Gewöhnlicher Blutweiderich".
Celine used the app "Seek" for the identification (see extra). Unfortunately it is not for free.
My mum uses to search for plants and critters with Google lens.
Which tool do you use for identification?