The Israeli-made Tonara ‘listens to you as you play, shows where you are in the score and turns the pages automatically,’ says the blurb.
Using iPad’s built-in microphone to listen as you play, it shows where you are at any given time (and where you should be, when playing in enselble). It turns the page only when you are ready and allows you to annotate as you go along.
There’s a free download here.
BDS supporters should look elsewhere.