A:AnswerThese headphones are very compatible in fact they run the iPhone chip and I believe they’re under the Apple product umbrella. However there is no app.
A:AnswerI would really not recommend doing that they are pretty water resistant so using them by the pool will probably be ok but I would not try swimming with them
A:AnswerThey do come with a nice charger and several different size ear tips but personally I never hear any outside noises they have a good ear seal and a slightly heavy bass, in most cases you probably won’t hear any outside noises anyways