Is there a phone application for the iphone that is more Senior friendly then the Apple app that comes with it?

Question

My Dad who is 81 is finding his iphone difficult to use. At first I was surprised that he struggles to use it. He had no problems using his old style cell phone. But after trying to teach him how to use the iphone I can now see why he struggles with it.  If the phone could have the features I've listed below it would make things so much easier for him.
1) With the exception of incoming phone calls, the phone app always opens to the same screen. This screen gives the choices of Favorites, Recents, Contacts, Keyboard and Voicemail  in big blocks in the center of the screen. 
2) There is a setting for the speaker so that it can be set to always be on. If the user doesn't want the speaker for a particular call or voice mail message  there is a  button on the screen to turn it off temporarily on the upper right corner. 
3) The dot button used to listen to a voicemail message is a bigger dot. And it remains visible after listening to the message. It changes color rather then completely disappearing after listening to the message.  
4) The upper left corner is reserved for only edit or to navigate back buttobs.  The phone app has a greeting button in this spot on the Voicemail screen. A better place for recording a greeting would be in settings.

Answer 1

http://www.apple.com/feedback/iphone.html