I used the pro version of XiiaLive but since a moment the alarm clock stop after 30 minutes.
Version : 22.214.171.124 (pro)
Device : Samsung SM-T110
Android : 4.2.2
Hello Sarah! Apologies for any delay in getting back to you. The latest release of XiiaLive allows you to turn off the alarm timeout option.
Here is how to do it:
Customer support service by UserEcho