Emulate iPhone app within another app? - iphone

I was wondering if I am able to emulate an iPhone app within an iPad app and allow people to use the iPhone application alongside the iPad app - by pressing a simple button, users would be able to use the other app. Obviously, this is an in-house application and not something that I'm launching to the App Store. Are there are libraries or framework available?
Thanks in advance - Daniel.

Why would you want to? The OS on the iPad can run iPhone applications natively. This is actually a requirement for iPhone applications.

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Launch an app when iPhone turns on

I'm making an app that needs to be launched when the user turns on the Iphone.
How can I make this? It is possible?
Thanks!
On a non jailbroken iPhone or iOS Device this is not possible through restriction of iOS/Apple.
If you aim for deploying your app on jailbroken devices have a look at launchd.

I want an iOS app which communicates to another app in PC/MAC via USB

I want an iOS app which communicates to another app in PC/MAC via USB.,Is there any way to do it without jailbreaking the iOS device and without applying to Apple's MFI Program ?
I don't intend to submit the application to Appstore.
Thanks for any help in advance.
You need to use the External Accessory Framework

How to make iPhone app searchable when search from an iPad

I created an iPhone app and published to the iTunes. Now my client complainig when he search it from the iPad it doesn't display under iPad apps. He asked me to make it search under iPad also. Then how I can do this plz help me.
Thanks
You can find it if you tap the iPhone tab on your iPad. If you want it to show up under iPad apps, it has to be an iPad app (or a Universal app, meaning it is designed for both iPhone and iPad). If you are looking to optimize your app for iPad and make it a Universal app, here are some resources to get you started:
Apple's Advanced App Tricks Guide
Creating a Universal iOS App Tutorial
Creating a Universal iOS Application
If you go to Xcode and start a new project, and click "Universal", Apple will have most of the work done for you. You will also find that it is a lot more straightforward than it sounds; basically you use the same code with different nib files. If you need more advanced control, you can always detect which device you are running on to do stuff programatically.

Adding an iPhone app binary to my current ipad app

I gave an app in the app store got ipad. I also made a app for the iPhone now.
What you guys suggest should I create a new app for the iPhone or is there way to add my iPhone binary to my current ipad app?
Thanks for your help.
There is no way to include the iPad and iPhone binary together. If you want to put them together, you'll need to create a universal application. You will have checks at run time that will determine whether or not your app is running on an iPad or iPhone, this will determine which set of ViewControllers your app will display.
There is a lot of information out there on creating universal apps.

Installing iPhone App to iPhone

I followed the tutorial from this site:
http://theappleblog.com/2008/08/04/tutorial-build-a-simple-rss-reader-for-iphone/
to make my first iPhone application, now I would like to test this application on my iPhone, what steps do I need to take in order to do this?
You have two choices. You can register to become an iPhone developer like most people do on the iPhone Dev Center, and then deploy directly to the device by selecting "Device - iPhone OS 2.2" in the Overview menu and then hitting Build and Go.
If you're not using any 2.2-specific APIs, you can compile with "Device - iPhone OS 2.1" and then send your app bundle over to a jailbroken iPhone via SFTP, and fake the codesign process using the ldid utility, allowing you to mess around with your apps on the device without registering to become a developer, and without having the headache of installing the open toolchain.
Become a registered iPhone developer. You can't deploy to the phone without doing this first.
http://developer.apple.com/iphone/