IPhone/iPod Touch/iPad Adapter : Excellent product, albeit a tad expensive

I bought this to use with the Peterson strobe tuner Android app, and it works perfectly.

Pros: Does what it says on the tin, plugs into a standard small jack socket on your phone and turns your phone into a tuner (so long as you've downloaded the app).

Cons; It's a bit on the cheap side feel wise, i think the jack plug could be a bit more heavy duty, but hey.. it still works. The Peterson tuner app isn't free, you have to pay for it so make sure you include this cost in the total. it's available from the Apple store, and the android App store. it's not expensive, and at just $9.99 is excellent. >

If your phone takes a type c plug you will also have to buy an adaptor so you can use this plug with your android phone. I just upgraded to a new Samsung Galaxy that doesn't have a standard jack socket so had to buy a short adaptor cable. Not the end of the world, but just one extra cost I didn't think about.