I have seen some apps that CLAIM that they can boost your battery life, but I wasn't sure. I'm not going to try.

Okay thanks!

Is it healthy to download an app in which your battery life will last longer?

It most definitely should not heat up. A relative of mine had a terrible charger: heated up, electric shock was very probable, and it was falling apart. Chargers aren't that expensive; you should check out a new one.

Welcome! I joined not too long ago.., enjoying the app! The atmosphere could be a little more customizable, though.

Shuffle
Touch nano (gave to bro)
iPod 4gen
Family macbook