Apple has been a reliable long-term investment that has regularly outperformed the S&P 500. Shares are up by 30% over the past year and have almost tripled over the past five years. While iPhone sales ...

Here's a look at how Apple's new iPads compare to their Android and Windows competitors in terms of specifications.

However, Apple’s success and opportunities have attracted several competitors. Apple investors may want to keep up with the competition and consider them for portfolio diversification.