Sometime, you will notice , some app are free for one day. So, we can get iPhone , iPad application can get free if we know what application are free. We can monitor from following websites.
freeappaday
You can check what app are free from this site but some information are wrong.
Free Game Of The Day
If you like playing game on iPhone, iPad , you should check this site daily. You can get one free game per day. Read More
