I have the Otter app both on my Iphone and my Ipad. It's free for 300 minutes a month or you can pay for the Pro (which I don't need). It's very handy when I have a business call and I just can't hear. It's very accurate when transcribing. What I like to do is have it open on my Ipad and my Iphone close by. I can read what they are saying. I have a hearing aid and a Cochlear Implant and hearing on the cell phone has been a problem for me. Most of my family and friends text me any more. Business calls I have to be able to hear what they are saying. I have Bluetooth on my hearing aids too.