iPhone users are still the most loyal to the platform by a wide margin, Zokem found in a study on Tuesday. Apple's platform was unique in commanding not only high loyalty from existing users, 85 percent of which planned to buy again, but being the most frequently sought after by those jumping over from competitors. Android had a higher loyalty, at 89 percent of existing owners likely to buy again, but there was higher overall turnover and fewer using another mobile OS likely to choose it as their next platform.