One of the biggest features of the iPhone 5s is its Touch ID fingerprint sensor that makes it much easier to secure the device using the owner's fingerprint for authentication. By simply placing your thumb on the sensor — or any finger, for that matter — the iPhone 5S can identify your fingerprint and unlock your phone. The iPhone 5S' fingerprint sensor is a nice piece of technology. It is capacitive and when you touch the iPhone's fingerprint sensor, it measures the minuscule differences in conductivity caused by the raised parts of your fingerprint, and it uses those measurements to form an image. Apple embedded this sensor in the Home button, and added a ring to turn it on and help reduce signal errors.
When you set up the iPhone 5S for the first time you can register a new fingerprint profile through a brief calibration process. The smartphone asks to repeatedly press your finger to the sensor, including the edges of your print, so that it can capture and store a unique TouchID. The iPhone 5S supports multiple profiles for multiple fingers and users, allowing you to give loved ones streamlined access to your device. Touch ID can also be used to make App Store or iTunes purchases. Just place your finger on the home button for a second or two, and like magic, you've been verified. Touch ID has 360-degree fingerprint readability. Apple claims that your fingerprint information is stored on the Secure Enclave. The information isn't accessible to any software, servers, or to iCloud.
Winner: iPhone 5S
