The app is "Minutes to Midnight" is simply a countdown of the time left before the day ends.

• Steps to Building you first iPhone app
• About using a timer to update UI elements
• How to specify your font type at runtime

All videos are not created equal. Campfire teaches you how to create a looping video effect with a UIImageView

• Steps to Building you first iPhone app
• Animating using UIImage View
• How to loop a video

openURL helps you launch Maps, SMS, Browser, Phone, and even other applications.

• Learn basic protocols supported natively by the phone
• Simple one line of code

What is the IP of your iPhone? You may working with a friend or family member and typically you would have them use IPConfig or website to return the IP, however it isn't that simple on the iPhone.

• Steps to Building you first iPhone app

Sure everybody know how to count, counting is easy. Many of us multitask our way through the day and know how easy it is to lose track of what number you were on. Use "Count Me In" to keep track if you were on 369 or 396.

• Run code before your application really begins by using the awakeFromNib event.
• How to use UIButtons, UILabels, UIImageViews, and more.

Do you know what your reaction time is? Mean RT is approximately 180 to 200 milliseconds to detect visual stimuli.

• Format strings and work with UIAlertView.
• Use NSTimer objects to create timers.
• How to use the random() function.

Speed dialer is for fast and easy calling to your favorite contacts, we can all use that!

• Apply native iPhone technology of dialing phone.
• Create setting bundles, read and write user settings.

Simple, yet cool! Load Flickr KML into Google Maps to show push pins on the map for photos that have been recently geotagged on Flickr.

• Run code before application really begins by using the awakeFromNib event.
• Call Google Maps from your application.
• "Utility Applications" for iPhone with XCode.

This is a simple application with a very cool effect. It renders a dynamic snow shower with a single flake image.

• Call use animations in your application.
• Timer and random number generator.
• Quartz animations.

Most of us know where we are at any given moment. But few of us know our exact longitude, latitude, and altitude.

• GPS access to longitude, latitude and altitude.
• Event delegates.
• "Utility Applications" for iPhone with XCode.

Are your walls straight in your house? A plumb-bob or a plummet is a weight with a pointed tip on the bottom that is suspended from a string and used as a vertical reference line.

• Basics of using the Accelerometer.
• Use of UIImage, UIImageViews, and Rotation Transforms

Life is all about making decisions, sometimes they are easy and sometimes they are tough. Let U Decide make the tough decisions for you.

• Generate random numbers.
• Use of UIButtons, UILabels, and more.
• Put IBActions into use.

Enjoy everyones favorite mobile search engine without the Navagation bar and the toolbar.

• How to embed resources into a UIWebView (very useful for embedded help files).
• Enable user interaction.
• Navigate to a mobile web site.

Need sleep? Sleep Sound is a sound generator that will play sounds of the ocean to help soothe you to sleep.

• Enable user interaction.
• Play looping background sounds.
• How to use UIImageView and UIButton.

Rain, rain, go away, will it come back another day? ZipWeather allows you to look up weather conditions by ZIP Code.

• Basics of downloading data with NSURLConnection.p
• More use of the UIWeb View.
• Do you need your umbrella today?

World Tour is an iPhone application that will help you keep track of when the iPhone Tech Talk World Tour is coming to town.

• How to use opacity with images.
• Use of rotation transformations.
• Create "animation wallpaper" and tile images.

Watch the flaming fireball bounce off the screen and leave a trail of smoke behind it.

• How to use opacity with images.
• Build a particle emitter.
• Use of the [UIView setAnimationDidStopSelector] to remove expired particles.

Homeland Security Advisory System is an iPhone application that will alert you to US Department of Homeland Security Advisories.

• Basics of downloading data with NSURLConnection.
• More with UIWebView and UIImage Views.

Wondering why your ears are popping? Mobile Altimeter allows you to track your altitude.

• GPS access to altitude information.
• How to use the UIImage View.

Temperature Converter allows you to convert temperatures between fahrenheit, celsius, and kelvin.

• Perform basic math operations on input and return output.
• How to use UITextFields, UIButtons, and UILabels.

iDrum is an iPhone application that turns your iPhone into a musical instrument of your own.

• Use of UIImageViews.
• How to play sound effects.
• More about "Utility Applications" for iPhone with XCode.

Pumpkin Face is a halloween themed application that could be used at night trick or treating to help light the way.

• Use of UIImageViews.
• Animations and opacity throughout application.
• More about "Utility Applications" for iPhone with XCode.

Hypno is an optical illusion iPhone application that could just possibly make you go cross-eyed.

• Use of UIImageViews.
• Animations and opacity throughout application.
• More about "Utility Applications" for iPhone with XCode.

Look up color HTML values on the go right on your iPhone! Special thanks to Bob Stein at VisiBone.com for permission to use their image.

• Use of the UIScrollView to view an image larger than the screen.
• How to use the UIToolbar.

The Sierpinski triangle is a fractal named after Sierpinski back in 1915. Originally constructed as a curve and is a mathematically generated pattern that can be reproducible at any magnification or reduction.

• How to use UIImage Views and Quartz graphics.
• Create a famous fractal.

LavaFlow is an iPhone application that plays a seamless looping video. This creates an entertaining "screen saver" like effect.

• Use of MPMoviePlayerController.
• More about "Utility Applications" for iPhone with XCode.
• How to loop a video

Easily use your iPhone or iTouch as a digital photo frame.

• How to use the UIImagePickerController, UIImageView and UIImage.
• More about "Utility Applications" for iPhone with XCode.

Look Ma no hands, it's one of those new fangled digital clocks. Another example of why less is more.

• How to use opacity with images.
• Animating using UIImage View.
• More use of the UITimer.

Password generator takes over the chore of constantly having to come up with unique passwords.

• Real working example of an app that is available in the App store today.
• Ability to skin an UIButton and many UI elements to use.
• How to do basic animations and use of random numbers.

It's a Death Calculator. It will tell you how long you have left to live in seconds, and the date of your demise.

• How to use UIImage Views, NSString format specifiers and NSDateFormatter.
• More about "Utility Applications" for iPhone with XCode.

Many of us hope we can strike it big with our mobile apps and have the money just rain on in. FYI, this is a full featured app that was previously rejected by the App store.

• Build a full iPhone application.

Example Applications

We have always learned best by example. We hope you will too. Here you will find 31 examples to help you get started as an iPhone developer.