Smartphones are a big part of our lives today, and the best smartphones serve as more than just phones. They hold memories like photos and videos, and also protect other important things such as passwords and confidential apps. Many of us have banking apps or investing apps on our phones, and allowing the wrong person access to those apps could be detrimental to our online security portfolio. Luckily, there are steps you can take to secure applications on the best Android phones, including locking applications individually.