Tomorrow Leica is rumored to announce a new iPhone grip that can control the FOTOS/LUX apps (by Fjorden?).
My guess is that this will be a new and improved version (Leica branded) of the Fjorden camera grip for iPhone. I already made a blog post on this rumor last year:
Leica acquired the smartphone photography startup Fjorden Electra AS last year:
New Leica LUX app can simulate the “Leica look” of different lenses