So far, I have two paid-for sound amplifier hearing aid applications, SpyApps Listen Up $2 and soundAMP $10. Listen Up could use a better volume limiter. The squelch control does not work and probably is not useful anyway. The most recent version of Listen Up has very slight lag between the microphone and the headphones, but the lag is much shorter than before the 3.0 compatible update. Just got soundAMP, it came with a lot of hype. It has almost no lag. One obvious flaw with soundAMP is poor/weak amplification. With the iPhone volume necessarily turned almost all the way up for significant amplification, when using the iPhone's built-in microphone, annoying pops are heard through the headphones whenever the volume is adjusted (like when receiving a phone call). soundAMP is overpriced. Compared to Listen Up, the current version of soundAMP might be worth about the same $2 (definitely not worth $10). -- Big front wheel skates (144mm front wheel, four 80mm trailing wheels). Great for rough street skating. http://www.flickr.com/photos/275322... archived from misc.phone.mobile.iphone

John Doe wrote: > So far, I have two paid-for sound amplifier hearing aid > applications, SpyApps Listen Up $2 and soundAMP $10. Listen Up > could use a better volume limiter. The squelch control does not > work and probably is not useful anyway. The most recent version of > Listen Up has very slight lag between the microphone and the > headphones, but the lag is much shorter than before the 3.0 > compatible update. Just got soundAMP, it came with a lot of hype. > It has almost no lag. One obvious flaw with soundAMP is poor/weak > amplification. With the iPhone volume necessarily turned almost > all the way up for significant amplification, when using the > iPhone's built-in microphone, annoying pops are heard through the > headphones whenever the volume is adjusted (like when receiving a > phone call). soundAMP is overpriced. Compared to Listen Up, the > current version of soundAMP might be worth about the same $2 > (definitely not worth $10). John, thanks for the reviews. are there other app choices? archived from misc.phone.mobile.iphone

soundAMP has been updated. They definitely increased/improved the amplification. They changed the frequency filtering graphics, for the worse IMO. For some strange reason, they flipped the GUI for use with the iPhone's built-in microphone, permanently, not according to the iPhone's orientation. Maybe they do not know how to program flipping of the screen according to the iPhone's orientation. I like the very simple GUI, but soundAMP has the feel of a program written by a programmer who does not use it. -- Big front wheel skates (144mm front wheel, four 80mm trailing wheels). Great for rough street skating. http://www.flickr.com/photos/275322... archived from misc.phone.mobile.iphone