Apple's iPhone 4 serves as both a telephone and a personal media center that allows you to stay connected to the Internet while on the go. The iPhone 4 also features a system of mobile applications, often referred to as "apps," which are available in a wide variety of categories including audio and video recording, games and productivity. As of February 2011, the iPhone 4 comes with either 16 or 32 gigabytes of storage space.
The iPhone 4 uses Retina display with a 960- by 640-pixel resolution. A built-in microphone allows you to record sound without any extra accessories. Dual cameras allow you to take photos and record video. Out of the box, the iPhone 4 comes with Apple's native apps, which include Mail, Safari, YouTube, Stocks, Weather, Clock, iPod and the App Store. The device also comes with white ear buds, a USB cable and a charging dock.
The iPhone 4 features not one but two 5-megapixel cameras. You can use both cameras to capture still images or record video. The camera on the front of the phone is particularly useful for taking pictures of yourself with friends and using Apple's "Face Time" video chat feature. The iPhone also features an LED flash that you can use for lighting while recording video. Both cameras allow you to tap on a subject to focus while taking photos or recording video.
Both cameras on the iPhone are capable of taking still photos and recording HD video. To access the video camera, tap the "Camera" app and slide the switch on the bottom right corner to the "Video Camera" icon. Press the red "Record" button to start filming; press the same button again to stop filming. You can use the "iMovie" app to edit your videos or download third-party apps to apply special effects to your videos during and after filming. Videos you record on the iPhone will appear in the "Photos" app, which is your photo library.
The iPhone 4 comes with the "Voice Memos" app for making short audio recordings such as notes and reminders. This app also allows you to edit your audio recordings and share them with family and friends through email or multimedia messaging. In addition, third-party audio recording apps are available for the iPhone with many more features. Apps such as Top Secret Audio Recorder, Audioboo and iRecorder Pro offer audio recording features such as delayed timer recordings, sharing audio recordings on social network profiles and Wi-Fi transfers to copy audio recordings to your computer.