"Unsane" movie
 

Saw it today (MoviePass...so...)

3.5/5 stars. I went in assuming it would simply be OK or quite bad. Surprised that I actually felt it was quite good and pretty much enjoyed it. The entire movie was "shot" with an iPhone camera - really. Other than the odd screen ratio - a bit 'squareish', one would be hard to notice. Acting - especially Claire Foy (English actress who play Queen Elizabeth on the Crown/Netflix) was very good...and did the American accent perfectly. Somewhat scary in parts and the storyline was interesting/quirky with some good twists at the end. And a 10-minute cameo appearance by a very famous A-list actor, which was a complete surprise.
All in all, worthy to see and I may see again when bored. But understandably many others may feel the complete opposite and feel a waste of their time.