I have created Map application for iPhone and I developed same Map application on iPad too by my client requirement. Now I have same Map app project but two .ipa files one f
If you wanted your iPhone and iPad project to be in the same app, you should have built it that way.
However, if you did specifically want a separate iPhone and iPad app, then you should make the difference clear in the names of each app.
There are many companies who have both iPhone and iPad apps on the appstore. Generally, the iPhone app is just called 'appName' and the iPad version is usually called 'appName for iPad'.
Examples of this are:-
Skype and Skype for iPad
Ebay and Ebay for iPad