help with astroshader app

[DAT]

Just wandering if anyone if anyone can tell me what I am doing wrong. I am trying to capture images using an iphone se and the astroshader app but cannot get rid of star trails. As someone has noted, it would appear the app is not aligning.

I have tried all manner of settings and combinations, including: reducing time and number of exposures, changing the iso, setting a delay on the shutter, different eps (from 9mm-to 30mm), no zooming, alignment set as "strong"...

I have also tried 3 different targets: m13, ring nebula and the double cluster in Persus (thinking the amount of stars I could frame would help).

I am observing from a very light polluted area but nonetheless expect that better results are possible.

I have also posted on CN in case the app developer picks up on it. 

Any help would be much appreciated

(thank you @PeterStudz for your help so far)