As these two smartphone titans continue to duke it out, stock traders may be tempted to try and pick favorites. However, due to the specific focus of QQQ and EWY, long-term minded ETF investors can have it both ways. Apple may dominate QQQ's index, but the fund has proved in the past to be an attractive option and suitable choice for those looking to construct a solid core. At this time, I hold the fund in a number of my client portfolios. Meanwhile, when used in small doses, EWY can be a suitable tactical holding when attempting to take aim at stable members of the developing world. With smartphones becoming increasingly engrained into our everyday lives, companies like Apple, Samsung, Google, and Microsoft appear to be in a strong position to benefit. Utilizing ETFs, it is possible to follow this exciting development while, at the same time maintaining a well-balanced portfolio. Written by Don Dion in Williamstown, Mass.