SpeedUp Player Pro 2020 IOS (iPhone, iPad, iPod) Save time listening to podcasts and audiobooks. Play at any speed using a slider!Study mode helps you learn more effectively.Sleep timer can save your battery while you sleep. SpeedUp Player Pro IOS Features:  Variable speed playback: 0.5X(half speed) – 2.5X (0.1X interval).  Preserve pitch(tone) while changing playback