You can play the audio slowly with either a long press or every second tap (you can decide which one to use or disable it in app preferences) on mobile apps.
To change the slow playback behavior
*As the system default settings for activating slow playback is "Long Press".
1．Tap the hamburger icon on the top left on Home screen
2．Tap "Preferences" on menu
3．Tap Audio > Slow audio playback trigger
4．Select a trigger as you like (Disable/Second Tap/Long Press)