The trend of having dual-cameras has established itself in the smartphone world, and it adds one more question to prospect buyers: are dual-camera better or worth the potential additional cost? As usual, the answer to this question depends on how you use the camera. With a clear explanation of what dual-camera system can, or cannot do, you can assess their value to you.
It is necessary to establish that “two” isn’t always better than “one”. Don’t let yourself fooled into that kind of thinking. Adding more cameras simply don’t scale the photo quality linearly, if at all. A secondary camera is often a supplement that creates new functionalities (artsy, effects) instead of increasing image quality (in the strict sense, not the artistic sense).